Hemi Oil Pump question.

Hemi2Much · Dec 12, 2021

I have the original oil pump that came on the engine. Is there any way to tell if the pump is good without running it in the car? Everything moves freely and I see no rust or pitting.
Any other time I'd always replace the oil pump.

Beekeeper · Dec 12, 2021

Take it apart and clean all parts and do a visual inspection. if you don’t see any abnormal wear assemble it using new o rings and put some assembly lube in it around the ring and rotor. There is a spec for clearance between the ring/rotor to the cover but I’m not sure what it is. Be sure to oil prime before you fire up the engine.

Beekeeper · Dec 12, 2021

One other thing I forgot to mention is be sure the relief valve moves freely in the bore.

Fran Blacker · Dec 12, 2021

Download a service manual for your car at this site. Go to engine section it shows you how to check pump clearances. The piston in the relief bore moves.
https://mymopar.com/service-manuals/

66Satellite47 · Dec 13, 2021

Take the pump apart, pull rotor out, inspect the bushing, verify the rotos do move freely, measure the rotor tip clearance on all rotor tips, Look for any major dings in the rotors. The factory service manual gives you the specs you need.

Dragon Slayer · Dec 22, 2021

You can buy a melling kit with new rotor assembly and rebuild the housing. As long as cover not worn, will make it like new.

Hemi Oil Pump question.

Hemi2Much

Well-Known Member

Beekeeper

It’s a disease without a cure!

Beekeeper

It’s a disease without a cure!

Fran Blacker

FBBO Gold Member

66Satellite47

Well-Known Member

Dragon Slayer

Well-Known Member

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