[Vwdiesel] Oil flow problem??

[James Hansen]

You need to pull the timing belt cover off and look at it.  No amount of
speculation can replace visualization.
Belt definitely slipped on the intermed shaft.  Figure out why is the
question.
Is the t-belt wet with oil from a recent seal failure?
Is the tensioner failing due to bearing failure?  If so, engine failure
follows the belt coming off/apart.
Intermed shaft pulley can also fail.
Check it now.
Beats walking.
-james

> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
> On Behalf Of Craig Osborn
> Sent: Sunday, January 03, 2010 10:08 PM
> To: 'Sandy Cameron'; vwdiesel at audifans.com
> Subject: Re: [Vwdiesel] Oil flow problem??
> 
> I replaced the original diaphragm vacuum pump with a "newer design"
> rotary
> vacuum pump this summer.  I mention this in case that makes the system
> more
> susceptible to a Vpump lock up in cold weather.  In your opinion,
> should I
> go back to the diaphragm style pump?  I will look for leaks in all of
> the
> hoses and fittings.
> 
> Craig
> 
> 
> > -----Original Message-----
> > From: Sandy Cameron [mailto:scameron at storm.ca]
> > Sent: Sunday, January 03, 2010 9:03 PM
> > To: Craig Osborn; vwdiesel at audifans.com
> > Subject: Re: [Vwdiesel] Oil flow problem??
> >
> >
> > At 07:26 PM 1/3/2010 -0500, you wrote:
> >
> > >but ran rough which is usual behavior in such temperatures.  After
> > >warming it up for about five minutes, I proceeded to set out
> > onto the
> > >road.  Almost immediately the engine started to squeal.
> > Initially, I
> > >thought it was a loose belt and ignored the noise.  After a
> > 1/2 mile or
> > >so, the oil light came on and the engine lost some power.
> >
> > Boy, you were lucky!
> >
> > The oil pump is driven by the accs'y shaft, which has a
> > smooth faced pulley that runs against the back (smooth) face
> > of the timing belt. Friction drive ONLY.
> >
> > A combination of heavy oil and a not quite tight enough
> > timing belt could stall the oil pump long enough to cause a seize-up
> >
> > I suspect ice in the vacuum pump might be the real culprit.
> > It is co-shafted with the oil pump, and if there are leaks in
> > the vacuum system, enough moisture could be drawn in to it to
> > freeze up the V-pump, stalling the oil pump, accy shaft, etc.
> >
> > The screech was caused by the timing belt screeching over the
> > face of the acc'y shaft pulley.  The oil pressure light
> > should have been on the whole time, unless the ice that
> > stalled the V-pump was sucked in after the engine started. My
> > guess is it stalled the pump at the same time as the screech started.
> >
> > Better check your V-pump, plumbing, etc. The timing belt
> > tension is probably OK, or the next sound you would have
> > heard would have been bearing failure!
> >
> > Sandy
> >
> > Internal Virus Database is out of date.
> > Checked by AVG - www.avg.com
> > Version: 8.5.409 / Virus Database: 270.14.3/2411 - Release
> > Date: 10/03/09 06:20:00
> >
> 
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