[chaz069]

Had this engine apart six years ago and did a refresh, oil and water pumps, gaskets, seals etc. Have recently developed a whopper of a rear main leak. I don't remember if it had a one piece main or two. Getting ready for storage. Any suggestions, pics or how too would be of great assistance. Pull the engine or trans? Thanks chaz069

[ANDYA]

First make sure that it's the rear main seal and not the oil pan leaking. If it's the pan sometimes just tightening the bolts helps. If it's the rear main seal than the only way to do the job correctly is to put the engine on a stand and turn it upside down. It would be extremely difficult to do the job with the engine still in the car. With the engine out you can take your time changing the seal and also installing the oil pan so it doesn't leak.

[ponyakr]

It definitely does not have a one piece seal. These just became available recently.

http://www.bopengineering.com/beltdr...c_topend.shtml

I repaired the rope seal in my '69 GTO with the motor in the car. I think I got the instructions for this procedure from a '69 service manual. Not positive. Anyhow all you had to do was pack both ends of the block half of the rope down into the seal groove, then cut off two short pieces of the new rope, packing those as far down into the groove as possible, then cut 'em off even with the block. Of course, you installed the other half of the new rope into the main cap in the usual manner.

No, this was not real easy, but it worked. Probably been done by thousands of others before and after me. Of course, this would be easier with the motor out. I personally would go with the one piece seal.