OIl pump priming issue

roule · Oct 22, 2024

Hi,
Going forward with my rebuild (new cam and lifters) i'm stuck with my oil pump.
I checked clearance and gasket thickness before setting. I tried to prime with an electric drill...without success. i have pressure on the oil cooler exit (i put a bypass valve) so i imagine the sump filter is ok. But it's emulsified oil coming out ! mean something is clogged ?
and I have no oil from the sender hole...
my head gasket is a composite one (elring) with holes for the oilways .
I think (but not sure now) i have the good front timing gasket.
What is my issue ??

RangeRoller dt · Oct 22, 2024

You should start with the model and year of manufacture to give them few clues how to help you.

roule · Oct 22, 2024

RangeRoller dt said:
You should start with the model and year of manufacture to give them few clues how to help you.

It's a V8 3,9 EFI , vogue, 1991.

Mark Piercy · Oct 23, 2024

Is there any coolant in the engine?
Do you have a picture of the oil that is coming out when you run the pump?

Grrrrrr · Oct 23, 2024

Have you had the sump off? Has the o-ring on the oil filter pickup failed?

roule · Oct 23, 2024

Mark Piercy said:
Is there any coolant in the engine?
Do you have a picture of the oil that is coming out when you run the pump?

No coolant yet...i will put a photo of the oil coming out from the oil cooler plate, it's oil mixed with microbubbles

Mark Piercy · Oct 23, 2024

So there is air getting into the oil drawing from the sump I reckon, as grrrrrr said it could be the seal between the pump and pickup pipe

roule · Oct 23, 2024

Grrrrrr said:
Have you had the sump off? Has the o-ring on the oil filter pickup failed?

i clean the sump (mud and water...) the filter, and new gasket. New oil filter with oil inside and tightened by hand.

roule · Oct 23, 2024

Mark Piercy said:
Donc, il y a de l'air qui pénètre dans l'huile qui sort du carter, je pense, comme grrrrrr l'a dit, cela pourrait être le joint entre la pompe et le tuyau de prélèvement

Are you talking about this paper gasket ? (photo) I remember putting a light touch of hylomar to fix it in place, under the car, maybe it moved

To be sure, I might fill the sump with another 4 liters to reach this seal level...before removing the sump again.

But i can not understand why pressure on the cooler plate and nothing else where.

roule · Oct 27, 2024

I added 4 liters of oil, still nothing...it only comes out through the intercooler connection. I'm going to remove the relief valve and try again...
I wonder if an air leak at the feet of the rocker arm shaft (deformation / very malleable aluminum), the oil circulating there, could be the source of my pressure problems. I'm also going to drop off an arm to see if the oil comes up that far...

seldom · Oct 27, 2024

By emulsified do mean it is 'whitish' indicating mixed with coolant?

roule · Oct 29, 2024

News:
After connecting the 2 hoses of the oil radiator, and bleeding what air I could, I managed to get a pressure of 30 psi at 2000 rpm on my drill. This seems very correct to me. I get this pressure after about ten seconds. The resistance on the drill is not very high (I thought I read that it was more than that) and the oil rises well to the rocker arm ramps. On the other hand, I don't see the oil squirting, it's more of a light trickle of oil...
Only small concern: the 2 pump gears squeal (squeak) a little: too much play? problem with oil circulation in the pump?
Any advice or recommendations before I reassemble the radiator and fan? everything seems correct to you?

OIl pump priming issue

roule

Active Member

RangeRoller dt

Well-Sprung Member

roule

Active Member

Mark Piercy

Well fumbled member....

Grrrrrr

Technician, Bodgit & Scarper Ltd

roule

Active Member

Mark Piercy

Well fumbled member....

roule

Active Member

roule

Active Member

roule

Active Member

seldom

Member

roule

Active Member

Similar threads