Roy928tt

Well there you have it, plenty of opinions, qualified and otherwise, interestingly the 2 guys who have real world experience Brad and Myself both said, whatha! give it a go anyway. It is only an engine, a collection of parts, it will go together and function. How well and for how long is the X factor. Knowing the expense of a new set of rings, compared with buying yet another "cheap runner" engine I would assemble it with the best of the old rings. I say that because my labour costs me nothing, as does yours, if it doesn't work it can all be undone for a new set of rings to be fitted.

I'm reluctant to reuse cylinder head gaskets, however given the costs of 928 ones I would be putting some sealant on them prior to reuse. As a sealant I use Loctite 515 gasket elliminator, for a head gasket I might use Loctite 510 Flange sealant, it is recommended for higher temperatures.

Good Luck

Cheers Roy

Fronkenstein

Yes I have. Refreshed rod bearings and seals. R&R the heads. Reassembled using original pistons and rings. We never removed the pistons from the block. No issues, no unusual oil consumption. Engine has seen 5000 RPM without issue.

Why you ask did I not just go the extra route? This my first 928. Its not collectable. Its a learning experience. If this had been a collectable car then we would have gone through it entirely. The engine was relative low miles (77K) and the holes were in very good shape. And at the time I didn't realize that a Mercedes machine shop could have done the lapping job on the cylinders and I wasn't about to bring it to a shop that doesn't want or know about hypereutectic cylinder boring/lapping. So putting new chrome and iron rings in an unprepared block is too risky so we stuck with the originals undisturbed from their position in their respective cylinders. Not a hack, a cheat

Fronkenstein

MjRocket

Wow...5 year old thread revival.