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RE: Crank Seal
Wouldn't an inspection and clean of the crankcase ventilation system help / cure the problem. I think Alexanders car is a four cylinder, but I know on the I5 engines there is a dome on the right hand side of the block towards the flywheel that can be prised off and cleaned out along with a small hole that gets blocked that goes into the crankcase. Attached to this dome is usually a metal pipe that runs up to the breather hoses on top of the valve cover.
Phil, does the UK Q club have any meetings in Kent or Sussex??? Just wondering if it's worth me joining this, or Club Audi which as I found out meets pretty much on my doorstep.
From: email@example.com [mailto:firstname.lastname@example.org]
Sent: 07 December 1999 00:00
To: email@example.com; firstname.lastname@example.org
Subject: RE: Crank Seal
> I would like to know how the seal whistles if it doesn't leak oil, one
> would assume that if air can pass then so can oil. Does it leak
Positive crankcase pressure (blowby) < negative breather pressure.
More common on turbo engines than n/a ones, but not unknown. In part a
symptom of good piston rings.
And no - the fact that air can pass doesn't mean that oil could pass.
The internal rim of the seal is a micro-pump. Cut one in half sometime
and look at it under a microscope - the profile is quite complex. This
is why the seal should be oiled (but NEVER greased) during assembly.
UK Audi quattro Owners Club
Phone +44 7785 302803 Fax +44 870 0883933