I recently asked about a low oil pressure problem with my 93 EV. It
would start and the lifters would clack until they were pumped up,
then after about 15 minutes of driving (sometimes less if it were
warm out) it would loose oil pressure and the warning light and
beeper would start. Once you stopped driving it and it cooled off,
the cycle would start all over again.
I had decided that it couldn't be a plugged oil pump pick up tube as
it would have less pressure with the oil cold and more as the oil
warmed up. I didn't suspect the sensors as it truly had low oil
pressure if the lifters would loose their prime. I didn't suspect
the pump as it would have issues even when the oil was colder.
What I did was pulled the oil pan and replaced the mains and rod
bearings. It wasn't the funnest job in the world but I now have
constant oil pressure and no warning lights or beepers. It looked as
though the previous owner had overheated the motor and one of the
oiler bearings had actually come apart blocking the oil hole.
I also did not use "Eurovan" main bearings as they want to charge you
around $50 per bearing. That would be $300 for just the main
bearings. I found that the part numbers were the same for the older
Audi 5 cylinder motors and the whole set cost me about $75.
Anyway, I am just really glad and a little proud that I was able to
fix our little van. My wife is really glad as she can drive farther
than 5 miles at a time before the warning buzzer and light goes off.
Dave
