RE:Oil in intercooler pipe..

[Larry Smeins <lsmeins@ball.com>]

Date: Thu, 06 Nov 1997 07:45:32 GMT
From: quk@isham-research.demon.co.uk (Phil Payne)
Subject: Oil in intercooler pipe...

In message <QQdojx15758.199711052018@alterdial.UU.NET> "Brandon Hull"
writes:

> Well, my 200TQ engine is finally on a stand in the basement ready for
> teardown.  The first thing I removed was the pipe leading across the
front
> of the engine from the turbo to the intercooler.  Standing it on it's
side,
> about 2-3 tablespoons of what appears to be motor oil ran out on the
floor.
>  What should I infer from this?

>As little as this seems to fit with the concept of 'Vorsprung durch
Technik' -
>it's absolutely normal.  Oil _does_ collect at the low points of the
air 
>induction system. 

- -- 
 >Phil Payne
 >Committee Member, UK Audi [ur-]quattro Owners Club


Does this result from intentional oil seepage through the turbo
bearings?  Many years ago I installed an aftermarket supercharger that
had an oil injector to provide lubrication to the top rings under boost
on a VW.  The oil also lubricated the positive displacement compressor
vanes.  The idea was that when boost was present the positive pressure
during intake forced the oil on the cylinder walls away from the top
rings and they would run dry.  Conversely with intake vacuum present oil
would be pulled up and provide lube for the top rings.  I let the oiler
run dry and soon broke a top ring.   At least that was evidence to me
that upper cylinder oiling was necessary when blowing an engine that
wasn't designed for it.  Later I heard stories of intentional oil
seepage in turbocharger installations.  Considering the small amount of
oil consumption in my 5kcst, Audi can't be allowing much seepage but I
too find oil in the intake.

Larry
If you don't care where you are, you ain't lost.