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Re: General questions on 82 4000s
In message <2F3FBDCF@bur.dmcc.com> Stott Hare writes:
> As the new owner of a 4000s, I hope that you'll pardon these non-q
> questions... but first some background.
I think we're a pretty tolerant bunch. And the apology implies you'll one day
reach all the way ...
> Hard right turns would trip the [oil] light. No problem typical oil
> starvation due to lack of baffling.
Most of us find that pretty rare.
> If I was in fifth gear, about 2200 RPM and trying to accelerate, the
> light would begin to come on. Dim at first with a little/quiet buzzer
> growing brighter/louder if I continued without downshifting. This scenario
> holds for other gears.
> So right now I'm wondering if my oil pump isn't up to snuff, if I have
> blockage in the engine, or if the leaking valve stem seals could cause these
a) The daft ones first, but also the cheapest. Check you have the correct
dipstick for your engine. I know, it's unbelievable. But it's very
b) Hard right turns. Check both ends of any brown wires to and from the engine
block, plus any braided engine/chassis bonds. On an old car, it's common
to find some moron has left one off when, e.g., changing the alternator.
On Audis, these things are important returns for instrument circuits.
Also, replace the connector on the wire to the oil pressure sensor. That
wire goes bad 10 times as often as the sensor. (Sender, in German)
c) Increasing problems with increasing revs - it's not the valve stems.
This type of problem is sometimes seen in cars that have not had regular
servicing/oil changes. It's more common in turbos, but not unknown in
non-turbos that have had oil tip-ups rather than changes. Basically, it's
sludge and wax build-up. Some relief is available by removing the camshaft
cover and oil pan, and poking out the available oilways. You can also try
deliberate short changes with detergent oil additives - never very effective,
I fear. The key diagnostic is the service history - do you have documentary
evidence that the vehicle was serviced regularly? If you do, we may have
to think again.
Phil Payne Sievers
Vice Chair, UK Computer Measurement Group
Phone +44 385 302803
Fax/BBS +44 1536 723021