Oil Seal Leak 5TQ

[Ado Sigal]

Fred Munro wrote:

>Ian;
>
>Some of the bolt holes are drilled into oil passages. The bolts should be
>sealed with Loctite when installed. Leaking bolts are probably the most
>common cause of an oil leak after a timing belt job. I assume you are
>lubricating the seal lips with oil prior to installation.
>
>How many miles on your engine? I've never seen one with a grooved crank, but
>300k is the highest mileage I've ever worked on.
>
>HTH
>
>Fred Munro
>'94 S4
>
>-----Original Message-----
>From: quattro-bounces at audifans.com
>[mailto:quattro-bounces at audifans.com]On Behalf Of Dr. Ian McArthur
>Sent: January 20, 2005 4:32 PM
>To: Audi Audi
>Subject: Oil Seal Leak 5TQ
>
>
>I am having difficulty with a leaking front crankshaft oil seal on my 1988
>5TQ.  The first new seal I installed still leaked.
>The crank has a noticeable groove where the seal lip runs so I installed a
>second new seal flush with the front of the case (rather than inset) as
>described in the Bentley manual.  The seal still leaks.  I suspect that the
>lip is not in quite far enough and is overlapping the notch in the crank for
>the vibration damper keyway.  Or maybe I damaged the lip.  I have the proper
>Audi tool.
>
>  
>
Ian,

you must prepare the c/shaft and eradicate the groove prior to seal 
installation. Its a must, as well as shaft lubrication and shaft 
protection, for which you can use el. insulation tape to cover the v/key 
slot end to overlap the end for at least the width of the tape, to help 
you to ease the seal on the c/shaft safely. To eradicate the groove in 
the c/shaft, use a strip of 600 grade wet and dry paper wound around the 
crank and use only for aft radial motion, never axial. Light pressure 
only. Lubricate and clean the paper often with WD 40 or similar. Takes 
few minutes.

HTH,

Ado