Big Block Oil Pump is leaking from the cover joint, is this the right o ring?

[furious70]

My oil pump on the Fury is weeping/leaking from the joint between the pump and the filter cover/adaptor, a first for me. Is this the right o ring?

More Information for MAHLE B45558

MAHLE B45558 Molded Rubber O-Ring
also listed as this felpro PN

Fel-Pro O-Ring Oil Pump Cover Seal - 13338​

 

[lewtot184]

don't know for certain about the o-ring but i had a hv pump leak at the cover. after very close inspection i found out the the pump cover wasn't flat and any o-ring would have trouble sealing that.

 

[furious70]

This one supposedly ran for years ok but then the engine sat for some years before I bought it

 

[PurpleBeeper]

If it's a big block, I would be VERY inclined to just put a new oil pump on the motor....it's so easy to replace on a B/RB

 

[furious70]

I hear you, it's $2 vs $100. Oil psi has been fine so this felt worth investigating

 

[furious70]

Ok it's apart. And then it looks like it's the little o ring that was leaking based on external leak

 

[furious70]

So I've been looking for a gasket kit that has that. I thought this would

 

[furious70]

I think, based on looking at an pump gasket kit that the smaller diameter one may be it?
Because the larger one goes on the drive shaft

 

[furious70]

The filter adaptor has some light scoring that I can catch with my fingernail, any concern? Dress it down?

 

[furious70]

To get free shipping I did order option b

 

[1 Wild R/T]

To get free shipping I did order option b

View attachment 1497993

Always spent the extra $$$ to save on shipping....

 

[furious70]

Always spent the extra $$$ to save on shipping....

Yes, $10 to ship $7 of o rings or $100 for a part I may end up needing now but almost certainly will some day

 

[Gold Rush]

Time spent chasing the issue and peace of mind knowing you won't need to again soon are worth the $$$.

 

[lewtot184]

i've found thru the years that some pumps have round o-rings and some are square. they don't interchange.

 

[furious70]

i've found thru the years that some pumps have round o-rings and some are square. they don't interchange.

yup, as I looked at this more, the pump housing seemed to have lathe cut/square ones, they were nothing like the ones that came in the kit. So, after learning a few things, I put the new pump on it. Seemed leak free in a 10min idle in the garage.