Rear main seal

Bernie Benz b.benz at
Mon Aug 28 14:31:20 EDT 2006

> From: "Kenneth Keith" <auditude at>
> Kneale Brownson <kneale at> wrote:
>> I originally planned to replace the rear main seal as part of the throwout
>> bearing/clutch replacement.  But looking at the Bentley, I'd have to get
>> some additional new parts, namely new flywheel bolts, new needle bearing,
>> as well as some more tools I don't have yet.  I see no sign of rear main
>> seal leakage.  This car has ~130K miles.  Is rear main seal replacement
>> necessary?
> Imagine how you would feel after going through the trouble to pull the
> tranny to have the rear seal start whistling (sucking in air) any time
> the clutch pedal is not depressed, which happens.
What! You¹re running a vacuum in the crank case? And just why would it
whistle only when the clutch pedal is not depressed? No relationship, IMO.
I¹ve never heard of nor experienced such foolishness.

>  Worse yet, if the
> seal started leaking and ruined your new clutch and all the labor was
> wasted.  It's preventative maintenance, IMO.
Even worse would be to have the new seal not seal because of an infant
mortality problem! DF what AB!

Henny Penny, the sky is falling! Could just be the old blinker fluid
problem. I¹ve never replaced a rotary shaft seal in (oh my god!) almost 50
years, and never had one not recover from a leak in less than 1000 miles.

Hey, we have a good one going!

> For the cost of the seal, I would certainly replace it.  I don't think
> the flywheel bolts are quite as necessary and I would feel comfortable
> reusing them, assuming you put fresh blue locktite on them.  The
> needle bearing I would replace too, but I might feel comfortable
> leaving that alone and just replacing the seal.  It's not hard to do.
> The hardest part is the tranny R&R and that's already happening.  I
> say stick with your original plan.  Seal pullers are cheap if you need
> to buy one.  Factor in the labor cost savings by doing it yourself,
> and if you have to, sell the seal puller on Ebay afterwards.
> Cheers,
> Ken, wanting to replace my rear-ended pearl 200q20v with another one
> to keep the dream alive...
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