Oil Pump

[keith douglas]

can anyone help with a couple of measurements on a late td/tf oil pump. I need to know the o/d of the groove that takes the rubber seal - measuring it in place with a vernier I get 3 and 5/32 inches but it could be 80mm. An "on the bench" measurement with and internal micrometer would help me greatly. I seem to recall that the groove itself is 0.90" wide, is this correct? thanks and regards, keith douglas. [Non-text portions of this message have been removed]

[Robert F. Butson.]

Hello group, should the washers under the oil pump bolts be spring steel washers or copper washers for an MPJG engine?....Bob. Wales UK.

[Roger Furneaux]

hi Bob - they do the same job on both engines, so should be copper. The bolts should only be tightened to 12 lbsf. ft. or just until the heads begin to cut into the washers. I have these if you need any. ocTagonally TCRoger

> Hello group, should the washers under the oil pump bolts be spring steel > washers or copper washers for an MPJG engine?....Bob. Wales UK.

[rbtaras@sbcglobal.net]

If your oil pump cover and body are actually properly flat with no scratches in their surface they willl seal the oil in and you do not need the copper washers to prevent an oil leak. This was a cheap fix after someone tried to hand lap the cover or the body to get the scraches (from wear) out. The lock washer should be used if the body and cover is up to snuff. Remember ther should be no gasket or sealent between the cover and body of the oil pump as the changes the end float clearance, which should be between .0015 - .003. Any more and you start loosing pressure, any tighter and you will bind up and either break the gear on the oil pump or ruin the gear on the camshaft.

--- On Fri, 2/20/09, Robert F. Butson. robbut@onetel.com> wrote: From: Robert F. Butson. robbut@onetel.com> Subject: [mg-tabc] Oil Pump To: mg-tabc@yahoogroups.com Date: Friday, February 20, 2009, 7:51 AM Hello group, should the washers under the oil pump bolts be spring steel washers or copper washers for an MPJG engine?....Bob. Wales UK. [Non-text portions of this message have been removed]

[James Sullivan]

I am looking for a TC or TD oil pump. Does anyone have an extra that they would sell? Please reply off list. Thanks, Jim Sullivan TC 5515 & 7517 [Non-text portions of this message have been removed]

[laf48@aol.com]

Thanks listers, I have forwarded al to Dave Jorgensen, in Canada. Len

[Gene Gillam]

I know the "book" says not to use a gasket between the head and the body of the pump but is there *anything* that can be used to ensure a seal maybe something like http://www.amazon.com/Permatex-80697-Spray-A-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ? Thanks Gene Gillam Saucier, MS anngene@bellsouth.net

[Richard Waters]

I doubt that this is a good idea. I do not believe this interface is the source of leaks if the mating surfaces are in good order. Finally, gear-to-cover clearance is quite important, and any material added will alter this.  -Rick, TC 7881 Sent from my iPhone

On 2013-09-12, at 10:36 AM, Gene Gillam anngene@bellsouth.net> wrote:

  I know the "book" says not to use a gasket between the head and the body of the pump but is there *anything* that can be used to ensure a seal maybe something like http://www.amazon.com/Permatex-80697-Spray-A-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ? Thanks Gene Gillam Saucier, MS anngene@bellsouth.net

[Karl Vacek]

In aircraft oil pumps with a lapped seal between plates (and often between crankcase halves, etc.), it’s common to use Hylomar and a silk thread.  Sealed the pump in my radial engine a couple of years ago – still no leaks.

 

My favorite Hylomar is the “Advanced Formula” which does not contain solvents.  The solvent-based formulations (Racing Formula, etc.) are hard for me to handle as they thicken up so quickly while spreading.  Hylomar itself does not actually set up, but when the solvent flashes off you’d better be done spreading it.  Keep messing with it after that and it will rope and pull and be a mess.  Reapplying acetone helps, but it’s simpler to either work fast or use the non-solvent formulation.

 

Karl

 

 

[b]From:[/b] Gene Gillam [b]Subject:[/b] [mg-tabc] Oil Pump

I know the "book" says not to use a gasket between the head and the body of the pump but is there *anything* that can be used to ensure a seal…maybe something like http://www.amazon.com/Permatex-80697-Spray-A-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ

[Mark Deacon]

Hi All,I've probably missed the point here but are we still talking about oil pump bleeding. If so, I had this problem recently. I usually pack the oil pump with Vaseline patrolium jelly when I rebuild XPAG engines. Last time I forget to put the Vaseline in and got no 'suction'. Luckily you can still just about get the oil pump head off while the engine is still in the chassis. I did this, packed it with Vaseline and then bingo, instant oil pressure! Just in sealing. I have never put anything on. Just carefully match both surfaces by gentle hand grinding and assembling dry. I have never had a leak there yet on numerous engines. Sometimes oil comes out under the oil pump bolt heads. Since I started using copper washers and carefully painting them in, it's been happy dry oil pumping....Cheers AllMark D. Sent from my iPhone

On 12 Sep 2013, at 18:57, "Karl Vacek" KVacek@Ameritech.net> wrote:

  In aircraft oil pumps with a lapped seal between plates (and often between crankcase halves, etc.), it s common to use Hylomar and a silk thread.  Sealed the pump in my radial engine a couple of years ago still no leaks.

 

My favorite Hylomar is the Advanced Formula which does not contain solvents.  The solvent-based formulations (Racing Formula, etc.) are hard for me to handle as they thicken up so quickly while spreading.  Hylomar itself does not actually set up, but when the solvent flashes off you d better be done spreading it.  Keep messing with it after that and it will rope and pull and be a mess.  Reapplying acetone helps, but it s simpler to either work fast or use the non-solvent formulation.

 

Karl

 

 

[b]From:[/b] Gene Gillam [b]Subject:[/b] [mg-tabc] Oil Pump

I know the "book" says not to use a gasket between the head and the body of the pump but is there *anything* that can be used to ensure a seal maybe something like http://www.amazon.com/Permatex-80697-Spray-A-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ