reliability of the allroad? or 2.7T

[Mark R]

There's no doubt that increasing the boost pressures do cause more stresses
on the components.  These stresses directly equate to some increased wear.
How much?  I don't know if anyone has truly quantified this in a lab with a
slew of 2.7T engines... but I think my opening statement is reasonable.

That said, the K-03 turbos aren't a top-notch design.  Audi needed them to
last for 50,000 and for the most part, they did.  There were a slew of
1999-2001 model year K-03 turbo failures on both modified and stock cars.
When my 2000 S-4 blew a turbo (replaced the pair under warranty in 2002),
the dealership had 3 other 2.7Ts in for turbo failures (their top tech was
out on vacation putting my car #4 in the queue).  2 Allroads and one A6 2.7T,
all stock (from what I could tell).  Confusing the issue is that there was a
confirmed oil feed line problem with the 1.8T cars which did cause oil
starvation issues, often compounded by deposits caused by using conventional
oil with Audi's (not-often-enough) free maintainence.  Personally, my
car went to Mobil 1 at 1000 miles, changed at 2500 miles, and every 2500
since.  I'm anal about proper warm-up and cool down.  Mine failed, and even
if my car was boosted with a stret gas GIAC chip, that modest pressure
increase certainly wouldn't account for a turbo failure at 25,000 miles or
so.  From the dealerships, I heard there was also a casting problem in the
turbo housing causing the turbine shaft to not be properly oiled, and this
would certainly explain my failure (turbine in tact, but sheared from the
shaft).

I think it's safe to say the early 2.7T (1999 to sometime mid 2001) engines
are more likely to have a turbo failure than a 2002 engine, regardless of
any moderate boost increases.

Best,
Mark

On 5/2/07, mike <mikemk40 at yahoo.com> wrote:
>
>
> --- thejimrose <thejimrose at gmail.com> wrote:
>
> > .. if 'chipping' [i
> > hate that term, when we
> > mean optimising air / fuel mapping] a vehicle really
> > effects reliability,
> > then the roadside should be LITTERED with blown up
> > cars [and motorcycles].......
>
>
> I think the "optimising air / fuel mapping" bit is
> fine, it's the increase in boost pressure that causes
> the problems
>
>
>
>
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