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Timing Cover Seal
Posted: Wed Feb 07, 2001 1:28 am
by Glenda Nelson
Hi All
My XPAG engine is currently being assembled. Apparently there is an oil seal available which replaces the rope seal on the timing cover without machining of the cover being required.
Is this lip-type oil seal an improvement over the rope seal, and if so, would someone please supply the number of the seal and method of installation?
Regards
Ian Nelson, TC4195
Melbourne, Australia
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 2:08 am
by Andreas Pichler
In my opinion its not an improvement, because the front pulley is made
of aluminium alloy - so the surface is not hard enough, and the seal lip
cuts into the pulley.
Andreas
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 2:49 am
by PMS GB Ltd
Message text written by INTERNET:
pichler@mgcars.de
>In my opinion its not an improvement, because the front pulley is made
of aluminium alloy - so the surface is not hard enough, and the seal lip
cuts into the pulley.
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 2:58 am
by PMS GB Ltd
Message text written by PMS GB Ltd
>At the rear the leak is far more likely to be from the oilway blanking
screw of the Camshaft Bearing Core plug than the crankshaft seal!!!
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 3:06 am
by Michael Card
Ian The seal is Chicago Rawhide brand, type CR 36x47x7. [Figures are dimensions in mm I assume.] There will be other manufacturers of equivalents. No machining required, just seal it into the groove using a suitable oil-resistant compound. Use the pulley to ensure that the seal is axially aligned correctly. Re comment by Andreas, I have never seen an alloy front crankshaft pulley, only steel cast ones. Mike Card, Surrey UK TC 8233 [and TC 9477 [u]still [/u]in pieces] PS Will be in Melbourne early next month.
----- Original Message ----- My XPAG engine is currently being assembled. Apparently there is an oil seal available which replaces the rope seal on the timing cover without machining of the cover being required. Is this lip-type oil seal an improvement over the rope seal, and if so, would someone please supply the number of the seal and method of installation? Regards Ian Nelson, TC4195 Melbourne, Australia
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 3:11 am
by David Whittle
Clive
Last year I could not spell 'Engineer', now I are one!
(not original I know)
Regards David
>>> PMS GB Ltd 100070.740@compuserve.com> 07/02/01 10:57:19 >>>
Message text written by PMS GB Ltd
>At the rear the leak is far more likely to be from the oilway blanking
screw of the Camshaft Bearing Core plug than the crankshaft seal!!!http://www.aeat.co.uk
AEA Technology plc registered office 329 Harwell, Didcot, Oxfordshire OX11 0QJ.
Registered in England and Wales, number 3095862.
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 5:12 am
by Chip Old
On Wed, 7 Feb 2001, Andreas Pichler wrote:
> In my opinion its not an improvement, because the front pulley is made
> of aluminium alloy - so the surface is not hard enough, and the seal
> lip cuts into the pulley.
Andreas,
The original pulley isn't aluminum, it's steel..
--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net
Timing Cover Seal
Posted: Wed Feb 07, 2001 5:17 am
by Pty. Ltd
Ian,
I have used the new seals with mixed success.
1. Due to wear, it is often necessary to machine a sleeve for the
seal surface of the front pulley. Any wear here will mean leaks from
the new seal.
2. It is not easy to get the seal central to the crankshaft and
difficult to keep it that way when you tighten the sump. This needs
patience and care. Any error here and it will leak. The O/D of the
seal is less than that of the circular slots in the sump and timing
cover so you need to "float" the seal in silicone gasket compound
and give it plenty of time to set after installation.
3. As far as I'm aware these front pulleys were never Aluminium
like was suggested but if so, the sleeve will take care of that
problem.
4. I use is readily available seal SKF part number CR 36 X 47 X 7
VivJ
Cape Town
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 6:28 am
by Andreas Pichler
Okay, no aluminium...but anyway, the surface of the pulley is so soft
that there will be a cut from the eal lip - have tried it and go for the
"asbestos" string again.
Andreas
Re: Timing Cover Seal
Posted: Wed Feb 07, 2001 7:26 am
by joecurto@aol.com
Ian I am sure you will get many correct answers so here is mine, I am using
the original rope seal and the conventional rear main and am using castrol
syntec synthetic oil and have no leaks from the front and just a minor amt of
sweat from the rear, and a dry side cover and valve cover.
Joe Curto