Engine Builder Advice

[Mitch1]

Hi all,
First time caller, long time...well you know. I'm in the process of starting a rebuild
of my 83 911 SC. Motor is out. This started as just fixing some leaks. But, since I have it out I might as well do what I think is needed. Engine has 136k miles. Ran strong with no smoking. All heade studs intact. Has Kloberschmidt Alusil cylinders.

Trying to get some input on what I should do with cylinders. I want to reuse them. Either leave them alone with pistons removed with cylinders, (no re-ringing), or remove and have them reconditioned after being checked, by someone familiar with Sunnen honing procedure for Alusil cylinders. Or have them plated with Nikasil? Thanks. Been obsessing about this for a week or so. Need to make a decision.

[billybek]

Where are the leaks coming from?
Do you have to break the engine down to repair the leaks?

[Mitch1]

Yeah Bill, cam seals, front and rear main seals and possibly 2 case through bolts...and oil cooler.

[HawgRyder]

Old trick with airplane engines to help seal them.....
After putting the 574 or whatever sealer on the case halves...run a silk thread along the flange (leaving it stuck in the goo).
This helps to seal some cases...because the roughness of the flange can sometimes allow leaks.
Bob

[billybek]

If it was coming apart I would do the head studs. It would suck to get it back together just to find a broken stud during the first valve adjustment.
Oh, and while your in there......