High oil pressure

[marka]

Today i took my my 88My esprit turbo for a spin and the oil pressure went to over 5 bar, does anybody have any ideas?

[andydclements]

It could be due to a stuck pressure relief valve, but the reading means more if we know what your normal pressure reading was for this situation and what the situation is (warm engine/ cold engine, type of oil used etc).

Andy

[dodgy]

5bar, or about 75psi would be a good oil pressure for a cold engine. iirc, mine runs about 60psi (4 bar?) with high throttle when warm, then drops to 25psi (approx 1.6 bar) on warm tick over.

If the thermostatic pressure relief valve does not work, you have a chance of blowing your oil cooler ( will be on my second cooler in 6 months of driving when i get back, due to my S3t not having a bypass valve fitted )

[marka]

From cold the pressure would be shy of 5bar then as the engine warmed through it would settle to about 4.1 Bar. At the moment at idle the pressure is about 2.5bar, but when the engine is reved the pressure increases rapidly to over 5bar. As i have not has the car for long i am going to change the oil and filter, simply then i know the correct oil in in it and its a good place to start. Andy you mentioned the relief valve is it accessible to service.

Many thanks to the Andy and Dodgy for responding

[marka]

Just a update on this one. I eventually got round to changing the oil, filter. Which made no difference, my attention then turned to the pressure sender unit. This was where the fault was i.e dodgy wiring, cleaned up the connections all is now fine. The oil pressure stable at 4.1 Bar

[stevem]

Just a update on this one. I eventually got round to changing the oil, filter. Which made no difference, my attention then turned to the pressure sender unit. This was where the fault was i.e dodgy wiring, cleaned up the connections all is now fine. The oil pressure stable at 4.1 Bar

Hi Mark

I have the exact same symptoms -can you tell me where to find the pressure sender connection/s ? At idle it sits at 2.5, when under way it's up at 5 bar, on the end stop. Oil and filter changed, no difference. I've had a look for the sender but can't locate it, is access from top or bottom ?

cheers

[rogerch]

It's under the plenum, just forward of the starter motor. Just about impossible to get to without removing the plenum, watch the gasket.

Roger

[lotus4s]

It's the blue arrow in the pic.

[stevem]

Thanks guys, I'll get in there and have a look tonight. The pics and wise words are appreciated.

Ta !