Very High Oil Pressure

[Fazza6868 0]

We have just finnished the rebuild on my alloy block MI , we replaced the oil pump with a QEP item and upgraded to the pug 6 bar spring , the oil pressure is dangerously high to the point it has pushed the rubber o ring out of the filter , are we doing somthting wrong, Ian (my mechanic) has suggested the pressure relief valve maybe stuck, or that the QEP pump is not designed to work with the 6 bar spring.

 

Any ideas ?

[EdCherry 34 1 Cars]

Id go with the relief valve stuck.

[Miles 331 1 Cars]

Pattern pumps are horrid and the only one's I;ve had issue's with, Either buy a new OE pump or the old ones never give any problems, Seen well over 250k on mine with no hint of anything wrong

[Tom Fenton 1,542]

I had this on an engine I rebuilt, took the 6 bar spring out of the pump and replaced with the standard one, then OK.

[pablo 0]

where is the relief valve? In the pump itself?

[Fazza6868 0]

Miles the only reason we had changed it was due to main bearing failure and the amount of debris in the sump, Tom does the uprated spring make that much difference ?

[Tom Fenton 1,542]

Not on an OE pump, but the aftermarket pumps must be machined differently meaning that the Peugeot spring causes over pressure. I too had to change the pump on the engine in question due to scored rotors after main bearing failures.

[Jamal 2]

Mine is a standard pump with the standard spring.

At a the first few runs the pressure gauge showed approx 6,5 on rev at cold.

But now when cold it goes up to 8(the last row) and the gauge jumps up and down, not moving smooth.

 

It's a rebuilt engine. At approx 75 celsius oil temp the gauge shows 3 bar on idle.

 

So maybe my sender went wrong, or my valve stuck too?

 

Can it damage something?

Edited January 7, 2010 by Jamal

[craigmi16 0]

im lossing oil pressure when oil gets hot it will idle from cold fine about 3.5bar then when it gets hot it will drop to near the red so not been driving it. (its a 205 with mi16) so i hav bought a new standard oil pump and new 6 bar spring and new releif valve i will also put a new 13row oil cooler on aswell when i get better weather does any1 think this will help my problem. i no its not a cure but think it will help.

 

anyone have any opinions?

 

cheers craig

[craig_007 1]

im lossing oil pressure when oil gets hot it will idle from cold fine about 3.5bar then when it gets hot it will drop to near the red so not been driving it. (its a 205 with mi16) so i hav bought a new standard oil pump and new 6 bar spring and new releif valve i will also put a new 13row oil cooler on aswell when i get better weather does any1 think this will help my problem. i no its not a cure but think it will help.

 

anyone have any opinions?

 

cheers craig

 

Hi mate,

 

 

3.5 bar cold is quite low,Mine idles cold at 90 psi(6bar) and when reved goes off the gauge cold,100+psi.

 

When up to full temp(hard use) it then idles at 25psi.

 

Before I put a mechanical gauge on the car my oil pressure seemed very poor,This was with the Peugeot sender/gauge.

 

My advice before you buy anything would be,Fit an after market oil pressure gauge