Sorta OT question for the Engine re-builder gurus on the list (this is for my 88 944S). I'm putting new cams (stock factory) and lifters (OEM) in my 16 valve 944S. There are basically two type engine assembly lubes at the local FLAPS. One is a type of thick oil, maybe like GM's EOS, and the other is a moly/graphite grease. Which do most prefer or should I just mix the two to hedge my bets ??
Porsche manual () just says "lube with oil".
TIA
Glenn

 

Check out my engine rebuilding thread at http://www.pcarworkshop.com/index.ph..._case_together. I used an assembly lube but I don't remember its exact name right now (I am in hawaii on vacation). I can get it next week or just use a good breakin lube.

Explore the Pelican parts engine rebuilding forum as well...there is lots of info on breaking in the cams etc. Don't forget to keep the RPM's up at the beginning to make sure the surfaces get broken in well.

Cheers,

Mike

 

Glenn,

You should:

1) Coat the cam lobes with a moly-based lube such as what the cam manufacturers provide.

2) Use either EOS (old) in the oil or a specific break-in oil such as the Brad-Penn or Joe Gibbs oils made specifically for this.

3) Once you start the engine, maintain RPM above 2000 for at least 10 minutes.

 

Thanks Mike and Steve for your posts. I actually put the cams in an all-nighter session (until about 4:15 AM this morning). Luckily I did about ya'll suggested: smeared Moly-graphite type break-in grease on lobes, lifters, and cam bearings surfaces, then poured some of my stock of older type GM EOS assembly lube over everything, and poured the rest of the bottle of EOS into the crankcase with fresh oil. Removed spark-plugs and DME, and cranked until oil pressure showed on gauge, replaced plugs and DME and started and ran engine between 2000 and 2500 rpm for 30 minutes (found this on Comp Cams website). Drained oil overnight, then replaced oil and filter this afternoon. Drove the car around this PM and all seems well.

I'm guessing I'll kinda take it easy for the next 100 miles or so while varying RPMs, then change oil again after 500 miles. This seem like a good plan to ya'll ??