OIl pump priming issue

roule · Tuesday at 18:35

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 · Tuesday at 20:50

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

roule · Tuesday at 20:52

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 · Wednesday at 08:14

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 · Wednesday at 08:45

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

roule · Wednesday at 09:12

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 · Wednesday at 09:14

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 · Wednesday at 09:15

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 · Wednesday at 09:25

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 · 2024-10-27T17:08:28+0000

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 · 2024-10-27T18:02:39+0000

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

OIl pump priming issue

roule

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RangeRoller dt

Well-Sprung Member

roule

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Mark Piercy

Well fumbled member....

Grrrrrr

Technician, Bodgit & Scarper Ltd

roule

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Mark Piercy

Well fumbled member....

roule

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roule

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roule

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seldom

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