Are rear main seals interchangeable between LA and Big Blocks?
I understand that the slant six models use the same rear main seal as a big block but what about the LA series?
I rebuilt the 440-493 and installed a rear main from my stash of parts. It fit so I stupidly assumed that it was correct. I just started it and have a leak. Fine droplets are flinging off the back of the engine and it looks like it is coming from the crank, not the side seals of the retainer.
I have several rear main seals in bags with no clear definition of what they are for.
Below, These are two matching sets. One came directly from a new gasket set for a 440.
Here is another one with a different part number that looks similar.
Finally, there is this one that looks like one spec'd for LA series engines according to images on Rock Auto and Summit Racing sites.
None of the numbers on these bags matches anything online that I have checked.
The seal that I used was a MOPAR brand seal but again, I wonder if it was for a LA series and had some slight difference that I couldn't see.
Anyone have any insight on this?
I understand that the slant six models use the same rear main seal as a big block but what about the LA series?
I rebuilt the 440-493 and installed a rear main from my stash of parts. It fit so I stupidly assumed that it was correct. I just started it and have a leak. Fine droplets are flinging off the back of the engine and it looks like it is coming from the crank, not the side seals of the retainer.
I have several rear main seals in bags with no clear definition of what they are for.
Below, These are two matching sets. One came directly from a new gasket set for a 440.
Here is another one with a different part number that looks similar.
Finally, there is this one that looks like one spec'd for LA series engines according to images on Rock Auto and Summit Racing sites.
None of the numbers on these bags matches anything online that I have checked.
The seal that I used was a MOPAR brand seal but again, I wonder if it was for a LA series and had some slight difference that I couldn't see.
Anyone have any insight on this?