964 3.6l Engine Rebuild

[NoEardGoat]

After, a few years hold I am back at this project. I decided to split the case after finding missing or corroded material on piston #1 in the wrist pin area. This created some slop between the piston and pin. No bueno. Henry is sending me a replacement. He has suggested to cross drill the crank at the main bearings for better oiling and have the crank polished and balanced. Have the rods reconditioned and balanced and install ARP rod bolts with new rod bearings. Replace int. shaft bearings, cam chains. Inspect the main bearings, but possibly reuse them.

Here are some pictures of what the case has revealed. The main bearings aren't the most beautiful, and the nose bearing has some marring.

Please Advise..
[IMG] [/IMG]

[NoEardGoat]

[IMG] [/IMG]

[NoEardGoat]

Bump, looking for some advice from those more experienced in Porsche motor rebuilds...

[txhokie4life]

Not experienced -- but you've gone this far and still have a ways to go.
Why not replace the bearings and have confidence in the end result.

m

[Strygaldwir]

If $$$ is an issue, I'd trade the ARP rod bolts for new bearing every day! All the other items seem spot on. I'd add having the case checked for alignment. Ollie's did mine, (So long ago it was when they were in Santa Ana, Ca).

[ischmitz]

Not an expect. But I would always replace the mains - they are cheap. The nose bearing can be re-used but has a tendency to leak. Not sure if that is just at the outer O-ring that should be replaced no matter what or through the bearing itself. When I did mine I decided not to split the case and just did the rod bolts to ARP through the spigots.

Today 28,000 miles later the engine leaks at the nose bearing and I could kick myself that I didn't go all the way at the time.....

And having the case checked is a good idea and insurance for a long living engine.

Ingo