[Vwdiesel] 01 Golf TDi TURBO issues

[James Hansen]

Sorry, that's 30% for a diesel, 20% for a gas job.

> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
> On Behalf Of James Hansen
> Sent: Thursday, July 08, 2010 12:25 AM
> To: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] 01 Golf TDi TURBO issues
> 
> 
> > but not if the turbo's not functioning, correct?
> 
> Define not functioning first. No boost, or no turning.  Take away the
> backpressure of the manifold, and the turbo even in limp will move an
> ENORMOUS amount of air. It's a pump, and it does so rather well.
> 
> > (for the record, though, theoretically the majority of the energy of
> > the expanding combustion gasses goes into pushing the piston down,
> > right?
> > and the better/more efficient the engine, the more completely that
> > energy is spent
> > so the upstroke to exhaust, while expelling hot gasses, shouldn't be
> > fighting any real pressure from sill-expanding fumes, should it?)
> 
> Less than ~20% goes to the piston, the rest is wasted to friction
> (small)
> and waste heat (big).  The turbo catches some of that.
> 
> >
> > anyway, all that said, I am thinking the best place to start is
> simply
> > replacing lines
> > several people have said it's hard to see/find leaks, and the turbo
> > simply not working since the repair seems fishy
> > who's to say they only left one thing disconnected?
> >
> > any advice on what tubing to buy and where?
> 
> You need to check what holds vacuum, and what doesn't.  A hand-held vac
> pump
> is a godsend.
> I had an increasingly annoying loss of warp power that was
> intermittent.
> One day I smelled engine.  Turned out mice had chewed through the vac
> hose
> that takes boost pressure to the ECU, causing the "manifold actual
> pressure
> is less than specified" code.  Boost pressure was bleeding off into the
> area
> of the cabin air intake. Nice.  Even nicer mouse nest.  Now I have
> cats.
> I buy my black braided stuff at the stealer.  Buy enough, it gets
> cheaper.
> :-)
> 
> Don't let go of the wheel, just in case.
> -james
> 
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