Low oil pressure

[twoqu]

Agree with Error!
If you have not touched the engine other than the oil grade then its worth chucking in some oil of the recommended grade before tearing your motor apart. Cheaper too!

[Barn]

I am still working on rectifying my hot low oil pressure problem.
I have just received a new oil intake manifold to go on the end of the pick up tube as my one was a little distorted and seemed to be collapsed in. I have also dropped the main bearing caps to check the bearing play, I used a plastigauge and got a reading of 0.063-0.050mm across the board, I think the ware limit is 0.16mm so all good with the mains, this only leaves the oil pump drive lever or the pump itself, I think ?
So one question I have is how do I check the oil pump drive lever when I cannot warm the engine up ? or would it slip from cold as well.

[Error404]

Remove the oil pump and heat the drive up with a torch to around 100deg and see if you can turn it on the crank nose.
I would try running it on a more sensible oil first though

[Barn]

Thanks.
If it does spin will a new one fix the problem or will I need to get a slightly smaller one made ?

[UrS4boy]

Not in a gear pump. You said it was a gear pump, it's not. Different story.

Not a gear pump? You might want to tell Audi that.

From this older document:



I spy this. Hmm... the fools - they think it is a gear pump.

[Error404]

Lets not forget that will be a translation from German. There are all kinds of weird and wonderful names for stuff due to this.
I remember once buying a "dog" in an Audi box

[Thuppu]

I don't think it's totally wrong to call the I5 oil pump a "gear pump".

[K Simmonds]

Yeah, if I'd have to make a stab at an answer at say an Audi Enthusiasts pub quiz I'd call it a radial gear pump, which I know is incorrect and I'm yet to Google the term to see how wrong I am.

Anyway, I'd double check the pressure relief valve piston/spring and try running it on a more suitable grade of oil before condemning any major components, especially as you've checked the main bearings and their fine.

[Bowie69]

'Gerotor' looks right to me: http://www.casconpump.com/custom-pum...-technologies/

A conjugation of 'Gear' and 'Rotor' at a guess..... so you are all right(!)

[Barn]

Well after a long day I have got another oil pump fitted to my RS2 along with new oil intake manifold and two new sump gaskets, I have also purchased some 5w/40 engine oil.
Guess what great oil pressure from cold, but once she heats up the oil pressure drops and the alarm still sounds, am I missing something or being totally thick, what else can it be. The oil pump drive lever was solid, the main bearings are perfect with only 0.050mm of wear.
Any thoughts or does anyone want a cheap RS2 !

[Thuppu]

Quite much wear, how was the total clearance?

[AndyP]

What was oil pressure like before you had this work done on the steering?

[Barn]

When I got the car the oil pressure sender was leaking so I changed both of them with new audi parts, ran the car and it was fine, 2.5 bar at 2000rpm hot.
I then carried on with the steering work and when I finally got it back together the problems started.

[Barn]

Just carried out a wet oil pressure check using the smaller oil pressure sensor hole.
With a hot engine 10psi at idle and 22psi at 2000rpm ?????????? not good.

[Error404]

I want a cheap RS2