[Healeys] Timing cover oil seal leak

Rich C richchrysler at quickclic.net
Sun Jun 13 14:56:22 MDT 2010

I know that allowing the new seal installation in a timing cover to "find" 
it's own centering position is critical to having the seal not leak. It's 
very easy to accidentally allow the tightening of the timing cover bolts to 
draw the cover, and therefore the seal, off centre, in which case it will 
leak badly.


From: "S and T Miller" <stmiller96 at hotmail.com>
Sent: Saturday, June 12, 2010 5:19 PM
To: <healeys at autox.team.net>
Subject: [Healeys] Timing cover oil seal leak

> The problem:  My 57' 100-6 leaks oil from the front timing cover oil seal
> which gets on the pulley and flings the oil inside the engine comp and 
> onto
> the underside of the bonnet.  It doesn't do it all the time, but SEEMS to 
> do
> it when driven harder and longer.
> What I have done:  I removed and replaced the timing cover oil seal (Moss) 
> and
> inspected the pully flange surface- it looked ok (no major pitting or
> grooves). Now it Still leaks as much oil as before. I have blown through 
> the
> air filter hose back through the engine to make sure nothing is clooged 
> and it
> seems fine.
>  What I think may be the issue:  Since it SEEMS to do it when driven 
> harder,
> meaning after a harder accel. you can hear the belt slip because oil just 
> got
> on it, then the slipping noise goes away as the oil is flung off the belt. 
> I
> think that the engines internal pressure is pushing oil past the seal?  I 
> know
> there was alot of talk about the PCV valve to help with the rear main 
> leaking
> issue, but has anyone run into the issue with the front timing cover seal?
> BTW- I do have the rear main seal kit installed.  Could that be doing its 
> job
> and forcing the oil out the front?
>  Any thoughts?
>  The Millers

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