2.6 V6 Low Oil Pressure @ Low Revs?

[Watty]

Hi.

Just after a bit of information or/& help.

I have just invested in an Audi 80 2.6E V6 and have noticed that when up to temperature, when at tick-over, the oil light comes on and the gauge in the centre dash reads almost zero. The light goes out with slightly more revs, taking tick-over from 750 to 1000 RPM, and the needle in the gauge picks up to just under 1 bar. When driving, the oil pressure light never comes on, but the gauge only reads not much more than 2 bar with normal driving.

Any offers on whether it's a low tick-over related problem, grade of oil, oil pump, faulty sender unit? Or infact it's a common problem.

Car has just done 107k miles on a 1995 and I had it serviced with its MOT at an independant VW Audi specialist.

Thanks,

 

[Olly_K]

does it to it at cold or at warm too ?

 

[Watty]

Doesn't happen until engine is warmed up as the idle is a tad faster.

 

[Rev-head]

when cold what does the gauge read?

 

[Watty]

close to 1 bar, but revs are around 1000 rpm.

 

[Rev-head]

a 2.6 V6 should be sitting at 5 bar when cold and sit at 3 bar when warm ......need to ask is the engine smoking ,do you have loss of power ,is the top end rattlie

if none of the above sounds like your oil pressure sendor is goosed ..if i remember it should be round about the oil filter area

 

[Watty]

Everything seems to be inorder engine wise - no smoking, rattling or noises and power seems really good, so I will try the pressure sender unit, once I have located it.

Many thanks.

 

[Watty]

Yes, sure enough - changed the sender unit (£5 but bit tough to get to), and now reading 3 bar when warm. If it was the oil pump It would be around the £500 fitted!!


Phew.

Only problem is, it doesn't seem to tighten up - so will have to keep an eye on it for leaks etc..? But it went on ok, not cross-threaded and the washer was in place???

 

[Rev-head]

good to hear its sorted just need to keep a eye on unit

 

[audi80sport]

hay watty where did you get the sender from? sounds exactly what mine is doing but its a 2l sport but when warm my pressure dies full stop and no amount of revs will put needle up but is fine when cold?

 

[Rev-head]

have you tried GSF ?

 

[audi80sport]

nope il give them a go cheers