Oil Pressure

[Bentley Lodge Goulburn]

I recently rebuilt my engine and I would have liked to replace but
declined the expense. I made a modification which seems to be
satisfactory. First I placed a washer between the spring and ball to
increase the blow off pressure by effectively lengthening the spring.
This raised it to C90lbs hot which worried me.

I then employed a method we used on the Cosworth pumps we used in
Formula Ford. I tapped a hole on the brass cover retaining the spring
and inserted a 6mm bolt and locknut which can be adjusted in to move a
platform the spring rests on to increase tension & pressure. This works
well, I think it is still set a bit high - 70-80lbs, possibly ok for
summer. No signs of a leak, Reason I used metric was I had a nut which
had a broad circular base larger in diameter than the hexs which I'm
sure seals it up nicely.

I believe no matter what you do to the spring the pressure at idle will
be unaffected.

Gos Cory
TC 5202, TF 5783

-----Original Message-----
From: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com] On Behalf
Of WM HYATT
Sent: Friday, 27 February 2009 4:48 AM
To: Clive Sherriff; Mg-taBC@yahoogroups.com
Subject: Re: [mg-tabc] Oil pressure

Clive -
Racing oils, motorcycle oils, are a good choice for breaking in of flat
tappet engines. Such oils have high levels of ZDDP as these engines do
not normally use Catalytic converters. Years ago ZDDP compounds were
used in oils for their anti-wear properties, but their levels have been
reduced over the years as they have been shown have effect lifespan of
C. Converter.
Oils with a starburst API "SM" designation (passenger car oils) have a
mandated Max of .08% PPM of ZDDP whereas non SM oils such as
Racing/Motorcycle oils unconstrained by C.C mandate typically still are
available with much higher levels of ZDDP. E.g. Tom's Valvoline VR1
Racing oil has up to 1300 PPM of ZDDP. Castrol's Syntec 20/50 full
synthetic (can should say recommended for Classic Cars) i.e. non
Catalytic Conv. cars has 1200 ppm of ZDDP. Brad Penn Grade 1 Racing oil
(non synthetic) has 1500pp ZDDP. Classic Car Motor Oil
(www.classicmotoroil.com) offers an oil with 1500-1600 PPM of ZDDP
bottled by D-A Lubricant Co. www.dalube.com
ZDDP additives such as GM E.O.S,, ZDDPlus, www.zddplus.com, Camshield
www.camshield.com are available for initial break-in at each oil change
if a modern oil with API SM rating is opted for instead of possibly
harder to get & more expensive oils listed above.

Bill
TC4926
Odessa, Fl.

p

----- Original Message -----
From: Clive Sherriff
To: TWilson@indy. rr.com ;
mg-tabc@yahoogroups .com
Sent: Wednesday, February 25, 2009 5:51 PM
Subject: Re: [mg-tabc] Oil pressure

Tom,

Some seem content with 10 on tickover and 40
running. However I must admit I prefer to see
my oil at 50 / 60psi when running hot, and
about 20 at hot tickover in road use. (Racing
oil? - for a higher compression road or racing
engine I'd want a full 60 / 70 psi very soon
after my 25 psi at tickover revs)

Possibly a weak pressure spring - take the cap off
and fit a few small washers under the spring and
see what this does, (you can then replace or stretch
the spring if this seems the problem, otherwise
maybe the pump lid is worn and needs regrinding
dead flat to stop internal back oil seepage, but be
warned that less than 0.0015inch clearance
between the lid and the gears may well cause
a seizure when hot.

Rocker arm is easily checked by putting a thin
shim under the rear rocker post to block off the
oil supply and running for a short time (30 secs
should be enough, to see what that does to the
pressure.

Clive
Oxford UK
==================================

----- Original Message -----
From: Tom & Emily Wilson
To: mg-tabc@yahoogroups .com
Sent: Wednesday, February 25, 2009 8:21 PM
Subject: [mg-tabc] Oil pressure

I fired up the rebuilt "restored" engine for TC0272 this afternoon. It
started on the first crank and seems to be running pretty nice.
Oil pressure on the engine is still somewhat low. I'm using Valvoline 30
weight racing oil to break the engine in, and pressure at idle is 32
pounds.
At 3000 RPM it goes up to 40 pounds.
The only two things I didn't repair in the engine are the oil pump and
the
rocker arm assembly. So the options on oil pressure being low are these
two
things plus the pressure relief spring.
Is the pressure at a low enough level that I should be concerned about
this?

Thanks.
Tom Wilson
TC0272 & 0273

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]



[Non-text portions of this message have been removed]

[cliffknight@tiscali.co.uk]

The blow off spring and ball valve is only a protection device against damage due to excess pressure building up when the oil is cold, or with a new engine where downstream clearances are tight. The items that control the hot running pressure should be the clearances in the pump, the leakage past bearings, and the condition of the oil and its temperature. The blow off type ball pressure relief valve is designed to be shut during normal running and not to act as a pressure regulator. A pressure regulator would have a profiled plug, not a ball and would prevent the oil gauge being used to detect overheating as described in the manual.

As supplied, the spring is not adjustable and according to the factory literature it is set to 50 to 70 lb. per sq.in. I would interpret this range as 50 hot and 70 cold but I may be wrong. My own experience is that a rebuilt XPAG engine will easily go up to 70 cold and will run at near or sometimes above 50 hot. This rapidly drops, as the engine runs in, to 40ish. With age it continues to fall but anything above 30 seems to indicate that bearings are still servicable. Remember that the volume of oil circulating is in inverse proportion to the pressure so lower oil pressure is an indication of more oil at the bearings not less. When bearings fail you will normally see a catastrophic fall in pressure down to a few psi in a relatively short time. (not always .........so keep listening and checking). The MG literature quotes 40 psi min. at speed and 10 psi min at tickover under normal running conditions.

The pressure gauge on the dash is not very accurate so readings for setup checking should always be done with a decent calibrated master gauge.

Cliff


----Original Message----
From: goscory@ozemail.com.au
Date: 27/02/2009 11:26
To:
Subj: RE: [mg-tabc] Oil pressure







I recently rebuilt my engine and I would have liked to replace but
declined the expense. I made a modification which seems to be
satisfactory. First I placed a washer between the spring and ball to
increase the blow off pressure by effectively lengthening the spring.
This raised it to C90lbs hot which worried me.

I then employed a method we used on the Cosworth pumps we used in
Formula Ford. I tapped a hole on the brass cover retaining the spring
and inserted a 6mm bolt and locknut which can be adjusted in to move a
platform the spring rests on to increase tension & pressure. This works
well, I think it is still set a bit high - 70-80lbs, possibly ok for
summer. No signs of a leak, Reason I used metric was I had a nut which
had a broad circular base larger in diameter than the hexs which I'm
sure seals it up nicely.

I believe no matter what you do to the spring the pressure at idle will
be unaffected.

Gos Cory
TC 5202, TF 5783

-----Original Message-----
From: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com] On Behalf
Of WM HYATT
Sent: Friday, 27 February 2009 4:48 AM
To: Clive Sherriff; Mg-taBC@yahoogroups.com
Subject: Re: [mg-tabc] Oil pressure

Clive -
Racing oils, motorcycle oils, are a good choice for breaking in of flat
tappet engines. Such oils have high levels of ZDDP as these engines do
not normally use Catalytic converters. Years ago ZDDP compounds were
used in oils for their anti-wear properties, but their levels have been
reduced over the years as they have been shown have effect lifespan of
C. Converter.
Oils with a starburst API "SM" designation (passenger car oils) have a
mandated Max of .08% PPM of ZDDP whereas non SM oils such as
Racing/Motorcycle oils unconstrained by C.C mandate typically still are
available with much higher levels of ZDDP. E.g. Tom's Valvoline VR1
Racing oil has up to 1300 PPM of ZDDP. Castrol's Syntec 20/50 full
synthetic (can should say recommended for Classic Cars) i.e. non
Catalytic Conv. cars has 1200 ppm of ZDDP. Brad Penn Grade 1 Racing oil
(non synthetic) has 1500pp ZDDP. Classic Car Motor Oil
(www.classicmotoroil.com) offers an oil with 1500-1600 PPM of ZDDP
bottled by D-A Lubricant Co. www.dalube.com
ZDDP additives such as GM E.O.S,, ZDDPlus, www.zddplus.com, Camshield
www.camshield.com are available for initial break-in at each oil change
if a modern oil with API SM rating is opted for instead of possibly
harder to get & more expensive oils listed above.

Bill
TC4926
Odessa, Fl.

p

----- Original Message -----
From: Clive Sherriff
To: TWilson@indy. rr.com ;
mg-tabc@yahoogroups .com
Sent: Wednesday, February 25, 2009 5:51 PM
Subject: Re: [mg-tabc] Oil pressure

Tom,

Some seem content with 10 on tickover and 40
running. However I must admit I prefer to see
my oil at 50 / 60psi when running hot, and
about 20 at hot tickover in road use. (Racing
oil? - for a higher compression road or racing
engine I'd want a full 60 / 70 psi very soon
after my 25 psi at tickover revs)

Possibly a weak pressure spring - take the cap off
and fit a few small washers under the spring and
see what this does, (you can then replace or stretch
the spring if this seems the problem, otherwise
maybe the pump lid is worn and needs regrinding
dead flat to stop internal back oil seepage, but be
warned that less than 0.0015inch clearance
between the lid and the gears may well cause
a seizure when hot.

Rocker arm is easily checked by putting a thin
shim under the rear rocker post to block off the
oil supply and running for a short time (30 secs
should be enough, to see what that does to the
pressure.

Clive
Oxford UK
==================================

----- Original Message -----
From: Tom & Emily Wilson
To: mg-tabc@yahoogroups .com
Sent: Wednesday, February 25, 2009 8:21 PM
Subject: [mg-tabc] Oil pressure

I fired up the rebuilt "restored" engine for TC0272 this afternoon. It
started on the first crank and seems to be running pretty nice.
Oil pressure on the engine is still somewhat low. I'm using Valvoline 30
weight racing oil to break the engine in, and pressure at idle is 32
pounds.
At 3000 RPM it goes up to 40 pounds.
The only two things I didn't repair in the engine are the oil pump and
the
rocker arm assembly. So the options on oil pressure being low are these
two
things plus the pressure relief spring.
Is the pressure at a low enough level that I should be concerned about
this?

Thanks.
Tom Wilson
TC0272 & 0273

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]













Get up to 50% off Norton Security 2009 only from Tiscali - http://www.tiscali.co.uk/securepc
__________________________________________

[Non-text portions of this message have been removed]

[Tom Wilson]

Here's an update on the low oil pressure problem for the engine in TC0272.
I blocked off the oil passage to the rocker gear and didn't see a noticeable
difference in oil pressure.
I pulled the oil pump for inspection. The internal parts were replaced by
the shop that did the restoration, but it turned out they didn't check
clearances. End clearance on the pump gears was over .004, plus an
additional amount created by the shellac used as a sealant for the cap-body
joint. Most of the wear is due to wear in the bottom of the pump body where
the gears ride.
I shortened the pump body and repolished the cap (it had grooves from the
idler gear). Now the clearance is .0030 to .0035. That's the maximum of
the specification range, but it should improve pressure.
The oil pump is back on the engine and I'll run it again tomorrow to see
what kind of improvement there is.

Tom Wilson
Zionsville, IN
TC0272 & 0273




[Non-text portions of this message have been removed]

[Tom & Emily Wilson]

Oil line to the pressure gauge is connected to the fitting on the engine
block.
Tom

_____

From: sebring222@aol.com [mailto:sebring222@aol.com]
Sent: Sunday, March 01, 2009 8:05 PM
To: twilson@indy.rr.com
Subject: Re: [mg-tabc] Oil Pressure


Tom-
In an effort not to overlook anything, which banjo fitting is the oil
pressure line connected to? The cylinder head or the block?

Jim Dougherty
TC4931
TC5382
New Orleans



-----Original Message-----
From: Tom Wilson
Sent: Sun, 1 Mar 2009 6:00 pm
Subject: [mg-tabc] Oil Pressure

Here's an update on the low oil pressure problem for the engine in TC0272.
I blocked off the oil passage to the rocker gear and didn't see a noticeable
difference in oil pressure.
I pulled the oil pump for inspection. The internal parts were replaced by
the shop that did the restoration, but it turned out they didn't check
clearances. End clearance on the pump gears was over .004, plus an
additional amount created by the shellac used as a sealant for the cap-body
joint. Most of the wear is due to wear in the bottom of the pump body where
the gears ride.
I shortened the pump body and repolished the cap (it had grooves from the
idler gear). Now the clearance is .0030 to .0035. That's the maximum of
the specification range, but it should improve pressure.
The oil pump is back on the engine and I'll run it again tomorrow to see
what kind of improvement there is.

Tom Wilson
Zionsville, IN
TC0272 & 0273


[Non-text portions of this message have been removed]

[David Lodge]

Speaking of racing oils, is Castrol R still available? Ah! Club racing at Silverstone in the early 60s when it was still a WW II airfield!

Regards, Lodge in Vancouver

--- On Thu, 26/2/09, WM HYATT wrote:

> From: WM HYATT
> Subject: Re: [mg-tabc] Oil pressure
> To: "Clive Sherriff" , Mg-taBC@yahoogroups.com
> Date: Thursday, 26 February, 2009, 5:48 PM
> Clive -
> Racing oils, motorcycle oils, are a good choice for
> breaking in of flat tappet engines. Such oils have high
> levels of ZDDP as these engines do not normally use
> Catalytic converters. Years ago ZDDP compounds were used in
> oils for their anti-wear properties, but their levels have
> been reduced over the years as they have been shown have
> effect lifespan of C. Converter.
> Oils with a starburst API "SM" designation
> (passenger car oils) have a mandated Max of .08% PPM of ZDDP
> whereas non SM oils such as Racing/Motorcycle oils
> unconstrained by C.C mandate typically still are available
> with much higher levels of ZDDP. E.g. Tom's Valvoline
> VR1 Racing oil has up to 1300 PPM of ZDDP. Castrol's
> Syntec 20/50 full synthetic (can should say recommended for
> Classic Cars) i.e. non Catalytic Conv. cars has 1200 ppm of
> ZDDP. Brad Penn Grade 1 Racing oil (non synthetic) has
> 1500pp ZDDP. Classic Car Motor Oil (www.classicmotoroil.com)
> offers an oil with 1500-1600 PPM of ZDDP bottled by D-A
> Lubricant Co. www.dalube.com
> ZDDP additives such as GM E.O.S,, ZDDPlus,
> www.zddplus.com, Camshield www.camshield.com are available
> for initial break-in at each oil change if a modern oil with
> API SM rating is opted for instead of possibly harder to get
> & more expensive oils listed above.
>
> Bill
> TC4926
> Odessa, Fl.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> p
>
>
>
>
>
> ----- Original Message -----
> From: Clive Sherriff
> To: TWilson@indy.rr.com ; mg-tabc@yahoogroups.com
> Sent: Wednesday, February 25, 2009 5:51 PM
> Subject: Re: [mg-tabc] Oil pressure
>
>
> Tom,
>
> Some seem content with 10 on tickover and 40
> running. However I must admit I prefer to see
> my oil at 50 / 60psi when running hot, and
> about 20 at hot tickover in road use. (Racing
> oil? - for a higher compression road or racing
> engine I'd want a full 60 / 70 psi very soon
> after my 25 psi at tickover revs)
>
> Possibly a weak pressure spring - take the cap off
> and fit a few small washers under the spring and
> see what this does, (you can then replace or stretch
> the spring if this seems the problem, otherwise
> maybe the pump lid is worn and needs regrinding
> dead flat to stop internal back oil seepage, but be
> warned that less than 0.0015inch clearance
> between the lid and the gears may well cause
> a seizure when hot.
>
> Rocker arm is easily checked by putting a thin
> shim under the rear rocker post to block off the
> oil supply and running for a short time (30 secs
> should be enough, to see what that does to the
> pressure.
>
> Clive
> Oxford UK
> ==================================
>
> ----- Original Message -----
> From: Tom & Emily Wilson
> To: mg-tabc@yahoogroups.com
> Sent: Wednesday, February 25, 2009 8:21 PM
> Subject: [mg-tabc] Oil pressure
>
> I fired up the rebuilt "restored" engine for
> TC0272 this afternoon. It
> started on the first crank and seems to be running pretty
> nice.
> Oil pressure on the engine is still somewhat low. I'm
> using Valvoline 30
> weight racing oil to break the engine in, and pressure at
> idle is 32 pounds.
> At 3000 RPM it goes up to 40 pounds.
> The only two things I didn't repair in the engine are
> the oil pump and the
> rocker arm assembly. So the options on oil pressure being
> low are these two
> things plus the pressure relief spring.
> Is the pressure at a low enough level that I should be
> concerned about this?
>
> Thanks.
> Tom Wilson
> TC0272 & 0273
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>
>
> [Non-text portions of this message have been removed]

[pgh1949]

Castrol R is unfortunately not available in North America. I had a friend of mine bring back 4 litres from Holland last fall for my Scott motorbike. Had to have it of course for the sweet smell of the exhaust. Castrol had informed me that they did not have it over here due to lack of demand. Quite expensive but unique to be sure.
Regards
Brian in Alberta

----- Original Message -----
From: David Lodge
To: Clive Sherriff ; Mg-taBC@yahoogroups.com ; WM HYATT
Sent: Monday, March 02, 2009 9:30 PM
Subject: Re: [mg-tabc] Oil pressure


Speaking of racing oils, is Castrol R still available? Ah! Club racing at Silverstone in the early 60s when it was still a WW II airfield!

Regards, Lodge in Vancouver

--- On Thu, 26/2/09, WM HYATT wrote:

> From: WM HYATT
> Subject: Re: [mg-tabc] Oil pressure
> To: "Clive Sherriff" , Mg-taBC@yahoogroups.com
> Date: Thursday, 26 February, 2009, 5:48 PM
> Clive -
> Racing oils, motorcycle oils, are a good choice for
> breaking in of flat tappet engines. Such oils have high
> levels of ZDDP as these engines do not normally use
> Catalytic converters. Years ago ZDDP compounds were used in
> oils for their anti-wear properties, but their levels have
> been reduced over the years as they have been shown have
> effect lifespan of C. Converter.
> Oils with a starburst API "SM" designation
> (passenger car oils) have a mandated Max of .08% PPM of ZDDP
> whereas non SM oils such as Racing/Motorcycle oils
> unconstrained by C.C mandate typically still are available
> with much higher levels of ZDDP. E.g. Tom's Valvoline
> VR1 Racing oil has up to 1300 PPM of ZDDP. Castrol's
> Syntec 20/50 full synthetic (can should say recommended for
> Classic Cars) i.e. non Catalytic Conv. cars has 1200 ppm of
> ZDDP. Brad Penn Grade 1 Racing oil (non synthetic) has
> 1500pp ZDDP. Classic Car Motor Oil (www.classicmotoroil.com)
> offers an oil with 1500-1600 PPM of ZDDP bottled by D-A
> Lubricant Co. www.dalube.com
> ZDDP additives such as GM E.O.S,, ZDDPlus,
> www.zddplus.com, Camshield www.camshield.com are available
> for initial break-in at each oil change if a modern oil with
> API SM rating is opted for instead of possibly harder to get
> & more expensive oils listed above.
>
> Bill
> TC4926
> Odessa, Fl.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> p
>
>
>
>
>
> ----- Original Message -----
> From: Clive Sherriff
> To: TWilson@indy.rr.com ; mg-tabc@yahoogroups.com
> Sent: Wednesday, February 25, 2009 5:51 PM
> Subject: Re: [mg-tabc] Oil pressure
>
>
> Tom,
>
> Some seem content with 10 on tickover and 40
> running. However I must admit I prefer to see
> my oil at 50 / 60psi when running hot, and
> about 20 at hot tickover in road use. (Racing
> oil? - for a higher compression road or racing
> engine I'd want a full 60 / 70 psi very soon
> after my 25 psi at tickover revs)
>
> Possibly a weak pressure spring - take the cap off
> and fit a few small washers under the spring and
> see what this does, (you can then replace or stretch
> the spring if this seems the problem, otherwise
> maybe the pump lid is worn and needs regrinding
> dead flat to stop internal back oil seepage, but be
> warned that less than 0.0015inch clearance
> between the lid and the gears may well cause
> a seizure when hot.
>
> Rocker arm is easily checked by putting a thin
> shim under the rear rocker post to block off the
> oil supply and running for a short time (30 secs
> should be enough, to see what that does to the
> pressure.
>
> Clive
> Oxford UK
> ==================================
>
> ----- Original Message -----
> From: Tom & Emily Wilson
> To: mg-tabc@yahoogroups.com
> Sent: Wednesday, February 25, 2009 8:21 PM
> Subject: [mg-tabc] Oil pressure
>
> I fired up the rebuilt "restored" engine for
> TC0272 this afternoon. It
> started on the first crank and seems to be running pretty
> nice.
> Oil pressure on the engine is still somewhat low. I'm
> using Valvoline 30
> weight racing oil to break the engine in, and pressure at
> idle is 32 pounds.
> At 3000 RPM it goes up to 40 pounds.
> The only two things I didn't repair in the engine are
> the oil pump and the
> rocker arm assembly. So the options on oil pressure being
> low are these two
> things plus the pressure relief spring.
> Is the pressure at a low enough level that I should be
> concerned about this?
>
> Thanks.
> Tom Wilson
> TC0272 & 0273
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
>
>
>
> [Non-text portions of this message have been removed]




[Non-text portions of this message have been removed]

[David Lodge]

Hello Brian,

Well, the smell's the thing. Unforgettable!

Regards, lodge in Vancouver

--- On Tue, 3/3/09, pgh1949 wrote:

> From: pgh1949
> Subject: Re: [mg-tabc] Oil pressure
> To: emmgeeteecee@yahoo.co.uk, "Clive Sherriff" , Mg-taBC@yahoogroups.com, "WM HYATT"
> Date: Tuesday, 3 March, 2009, 10:47 AM
> Castrol R is unfortunately not available in North America.
> I had a friend of mine bring back 4 litres from Holland last
> fall for my Scott motorbike. Had to have it of course for
> the sweet smell of the exhaust. Castrol had informed me
> that they did not have it over here due to lack of demand.
> Quite expensive but unique to be sure.
> Regards
> Brian in Alberta
> ----- Original Message -----
> From: David Lodge
> To: Clive Sherriff ; Mg-taBC@yahoogroups.com ; WM HYATT
> Sent: Monday, March 02, 2009 9:30 PM
> Subject: Re: [mg-tabc] Oil pressure
>
>
> Speaking of racing oils, is Castrol R still available?
> Ah! Club racing at Silverstone in the early 60s when it was
> still a WW II airfield!
>
> Regards, Lodge in Vancouver
>
> --- On Thu, 26/2/09, WM HYATT
> wrote:
>
> > From: WM HYATT
> > Subject: Re: [mg-tabc] Oil pressure
> > To: "Clive Sherriff"
> , Mg-taBC@yahoogroups.com
> > Date: Thursday, 26 February, 2009, 5:48 PM
> > Clive -
> > Racing oils, motorcycle oils, are a good choice for
> > breaking in of flat tappet engines. Such oils have
> high
> > levels of ZDDP as these engines do not normally use
> > Catalytic converters. Years ago ZDDP compounds were
> used in
> > oils for their anti-wear properties, but their
> levels have
> > been reduced over the years as they have been shown
> have
> > effect lifespan of C. Converter.
> > Oils with a starburst API "SM" designation
> > (passenger car oils) have a mandated Max of .08% PPM
> of ZDDP
> > whereas non SM oils such as Racing/Motorcycle oils
> > unconstrained by C.C mandate typically still are
> available
> > with much higher levels of ZDDP. E.g. Tom's
> Valvoline
> > VR1 Racing oil has up to 1300 PPM of ZDDP.
> Castrol's
> > Syntec 20/50 full synthetic (can should say
> recommended for
> > Classic Cars) i.e. non Catalytic Conv. cars has 1200
> ppm of
> > ZDDP. Brad Penn Grade 1 Racing oil (non synthetic)
> has
> > 1500pp ZDDP. Classic Car Motor Oil
> (www.classicmotoroil.com)
> > offers an oil with 1500-1600 PPM of ZDDP bottled by
> D-A
> > Lubricant Co. www.dalube.com
> > ZDDP additives such as GM E.O.S,, ZDDPlus,
> > www.zddplus.com, Camshield www.camshield.com are
> available
> > for initial break-in at each oil change if a modern
> oil with
> > API SM rating is opted for instead of possibly
> harder to get
> > & more expensive oils listed above.
> >
> > Bill
> > TC4926
> > Odessa, Fl.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > p
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Clive Sherriff
> > To: TWilson@indy.rr.com ; mg-tabc@yahoogroups.com
> > Sent: Wednesday, February 25, 2009 5:51 PM
> > Subject: Re: [mg-tabc] Oil pressure
> >
> >
> > Tom,
> >
> > Some seem content with 10 on tickover and 40
> > running. However I must admit I prefer to see
> > my oil at 50 / 60psi when running hot, and
> > about 20 at hot tickover in road use. (Racing
> > oil? - for a higher compression road or racing
> > engine I'd want a full 60 / 70 psi very soon
> > after my 25 psi at tickover revs)
> >
> > Possibly a weak pressure spring - take the cap off
> > and fit a few small washers under the spring and
> > see what this does, (you can then replace or stretch
>
> > the spring if this seems the problem, otherwise
> > maybe the pump lid is worn and needs regrinding
> > dead flat to stop internal back oil seepage, but be
> > warned that less than 0.0015inch clearance
> > between the lid and the gears may well cause
> > a seizure when hot.
> >
> > Rocker arm is easily checked by putting a thin
> > shim under the rear rocker post to block off the
> > oil supply and running for a short time (30 secs
> > should be enough, to see what that does to the
> > pressure.
> >
> > Clive
> > Oxford UK
> > ==================================
> >
> > ----- Original Message -----
> > From: Tom & Emily Wilson
> > To: mg-tabc@yahoogroups.com
> > Sent: Wednesday, February 25, 2009 8:21 PM
> > Subject: [mg-tabc] Oil pressure
> >
> > I fired up the rebuilt "restored" engine
> for
> > TC0272 this afternoon. It
> > started on the first crank and seems to be running
> pretty
> > nice.
> > Oil pressure on the engine is still somewhat low.
> I'm
> > using Valvoline 30
> > weight racing oil to break the engine in, and
> pressure at
> > idle is 32 pounds.
> > At 3000 RPM it goes up to 40 pounds.
> > The only two things I didn't repair in the
> engine are
> > the oil pump and the
> > rocker arm assembly. So the options on oil pressure
> being
> > low are these two
> > things plus the pressure relief spring.
> > Is the pressure at a low enough level that I should
> be
> > concerned about this?
> >
> > Thanks.
> > Tom Wilson
> > TC0272 & 0273
> >
> > [Non-text portions of this message have been
> removed]
> >
> > [Non-text portions of this message have been
> removed]
> >
> >
> >
> >
> > [Non-text portions of this message have been
> removed]
>
>
>

[MGLeckstein]

I believe Abington Spares sells Castrol R

Mike

-----Original Message-----
From: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com] On Behalf Of
David Lodge
Sent: Tuesday, March 03, 2009 8:39 PM
To: Clive Sherriff; Mg-taBC@yahoogroups.com; WM HYATT; pgh1949
Subject: Re: [mg-tabc] Oil pressure

Hello Brian,

Well, the smell's the thing. Unforgettable!

Regards, lodge in Vancouver

--- On Tue, 3/3/09, pgh1949 wrote:

> From: pgh1949
> Subject: Re: [mg-tabc] Oil pressure
> To: emmgeeteecee@yahoo.co.uk, "Clive Sherriff"
, Mg-taBC@yahoogroups.com, "WM HYATT"

> Date: Tuesday, 3 March, 2009, 10:47 AM
> Castrol R is unfortunately not available in North America.
> I had a friend of mine bring back 4 litres from Holland last
> fall for my Scott motorbike. Had to have it of course for
> the sweet smell of the exhaust. Castrol had informed me
> that they did not have it over here due to lack of demand.
> Quite expensive but unique to be sure.
> Regards
> Brian in Alberta
> ----- Original Message -----
> From: David Lodge
> To: Clive Sherriff ; Mg-taBC@yahoogroups.com ; WM HYATT
> Sent: Monday, March 02, 2009 9:30 PM
> Subject: Re: [mg-tabc] Oil pressure
>
>
> Speaking of racing oils, is Castrol R still available?
> Ah! Club racing at Silverstone in the early 60s when it was
> still a WW II airfield!
>
> Regards, Lodge in Vancouver
>
> --- On Thu, 26/2/09, WM HYATT
> wrote:
>
> > From: WM HYATT
> > Subject: Re: [mg-tabc] Oil pressure
> > To: "Clive Sherriff"
> , Mg-taBC@yahoogroups.com
> > Date: Thursday, 26 February, 2009, 5:48 PM
> > Clive -
> > Racing oils, motorcycle oils, are a good choice for
> > breaking in of flat tappet engines. Such oils have
> high
> > levels of ZDDP as these engines do not normally use
> > Catalytic converters. Years ago ZDDP compounds were
> used in
> > oils for their anti-wear properties, but their
> levels have
> > been reduced over the years as they have been shown
> have
> > effect lifespan of C. Converter.
> > Oils with a starburst API "SM" designation
> > (passenger car oils) have a mandated Max of .08% PPM
> of ZDDP
> > whereas non SM oils such as Racing/Motorcycle oils
> > unconstrained by C.C mandate typically still are
> available
> > with much higher levels of ZDDP. E.g. Tom's
> Valvoline
> > VR1 Racing oil has up to 1300 PPM of ZDDP.
> Castrol's
> > Syntec 20/50 full synthetic (can should say
> recommended for
> > Classic Cars) i.e. non Catalytic Conv. cars has 1200
> ppm of
> > ZDDP. Brad Penn Grade 1 Racing oil (non synthetic)
> has
> > 1500pp ZDDP. Classic Car Motor Oil
> (www.classicmotoroil.com)
> > offers an oil with 1500-1600 PPM of ZDDP bottled by
> D-A
> > Lubricant Co. www.dalube.com
> > ZDDP additives such as GM E.O.S,, ZDDPlus,
> > www.zddplus.com, Camshield www.camshield.com are
> available
> > for initial break-in at each oil change if a modern
> oil with
> > API SM rating is opted for instead of possibly
> harder to get
> > & more expensive oils listed above.
> >
> > Bill
> > TC4926
> > Odessa, Fl.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > p
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Clive Sherriff
> > To: TWilson@indy.rr.com ; mg-tabc@yahoogroups.com
> > Sent: Wednesday, February 25, 2009 5:51 PM
> > Subject: Re: [mg-tabc] Oil pressure
> >
> >
> > Tom,
> >
> > Some seem content with 10 on tickover and 40
> > running. However I must admit I prefer to see
> > my oil at 50 / 60psi when running hot, and
> > about 20 at hot tickover in road use. (Racing
> > oil? - for a higher compression road or racing
> > engine I'd want a full 60 / 70 psi very soon
> > after my 25 psi at tickover revs)
> >
> > Possibly a weak pressure spring - take the cap off
> > and fit a few small washers under the spring and
> > see what this does, (you can then replace or stretch
>
> > the spring if this seems the problem, otherwise
> > maybe the pump lid is worn and needs regrinding
> > dead flat to stop internal back oil seepage, but be
> > warned that less than 0.0015inch clearance
> > between the lid and the gears may well cause
> > a seizure when hot.
> >
> > Rocker arm is easily checked by putting a thin
> > shim under the rear rocker post to block off the
> > oil supply and running for a short time (30 secs
> > should be enough, to see what that does to the
> > pressure.
> >
> > Clive
> > Oxford UK
> > ==================================
> >
> > ----- Original Message -----
> > From: Tom & Emily Wilson
> > To: mg-tabc@yahoogroups.com
> > Sent: Wednesday, February 25, 2009 8:21 PM
> > Subject: [mg-tabc] Oil pressure
> >
> > I fired up the rebuilt "restored" engine
> for
> > TC0272 this afternoon. It
> > started on the first crank and seems to be running
> pretty
> > nice.
> > Oil pressure on the engine is still somewhat low.
> I'm
> > using Valvoline 30
> > weight racing oil to break the engine in, and
> pressure at
> > idle is 32 pounds.
> > At 3000 RPM it goes up to 40 pounds.
> > The only two things I didn't repair in the
> engine are
> > the oil pump and the
> > rocker arm assembly. So the options on oil pressure
> being
> > low are these two
> > things plus the pressure relief spring.
> > Is the pressure at a low enough level that I should
> be
> > concerned about this?
> >
> > Thanks.
> > Tom Wilson
> > TC0272 & 0273
> >
> > [Non-text portions of this message have been
> removed]
> >
> > [Non-text portions of this message have been
> removed]
> >
> >
> >
> >
> > [Non-text portions of this message have been
> removed]
>
>
>





------------------------------------

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[Tweed]

...Ahh that smell!.... Back when a 500 Goldie with clip-on`s was King of the Road we used to put a drop in the petrol.... actually got pulled over by a copper for it cos he thought it was a `silly thing to do`.... he would no doubt have swapped it for the Speed Twin he was on though.

--- On Wed, 4/3/09, David Lodge wrote:






Hello Brian,

Well, the smell's the thing. Unforgettable!

Regards, lodge in Vancouver

--- On Tue, 3/3/09, pgh1949 wrote:

Had to have it of course for
> the sweet smell of the exhaust.



















[Non-text portions of this message have been removed]

[Ron Benson]

Hi All,

Some of us still put a drop of Castrol R in our petrol! And our lawn mowers,
you are not alone Badger. Always reminds me of 500 JAP. Speedway bikes.



Regards,

Ron Benson



[Non-text portions of this message have been removed]