Re: Rear Main Seal

Posted by Gary49eight On 2021/12/15 0:34:31
Hello 54ocmac. I have been up this path. I have installed rope seals before in various engines including my Packard 8, and all work fine except one, a 351 Cleveland. This has a smaller than usual seal groove and would not fit the rope. About 10 years ago now I got a neoprene seal for it, this was 2 piece, it solved the problem. You should be able to get your old rope seal out without dropping the crank. With a 2 piece seal use some sort of hydraulic sealant on all the seal to groove surfaces. I used some Loctite 515 I think from memory. If there is a spike in the groove in the block (hopefully not) or rear mains cap, this is to stop the rope seal turning, this has to come out. The faces of the seal halves where they meet need sealant, and lastly remember to stagger the seal halves. Not level, but rotated about 30 deg relative to the block/cap surface. Also sealant between the block and rear mains cap.
Hope this helps.
Gary

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