Can You Tell Is you have the updated P & C's
 

Is there some way of telling if your 964 engine has the updated Cylinders and Pistons without tearing the engine down?

Thanks Lorne M.

Possibly - If the shop that performed the work followed the Porsche instructions there should be a mark as shown in the attached image.

"Mark cylinder head with -10 or -20 appropriately on intake flange"



http://forums.pelicanparts.com/uploa...1249969701.jpg

Thanks I will check for the marks.

Lorne M.

What was this update for? (I know of the cylinder gasket update issue only)

That's the one

Lorne M.

anyone have more info on the whole job?

thanks lorne m.

the update was removing the heads and machining them to fit a gasket to them to stop the leak. only a few needed replacing the cylinders for that problem, never the pistons..

Thats the info that I am looking for what actually the TSB from Porsche says.

Lorne M.

That specific TSB "Refacing Cylinder Heads" (as well as many others for the 964) can be found at http://www.pcarworkshop.com/index.php/964_-_TSBs%2C_Parts_Guides

You must register at the site (its free) to see the TSB's

I had also bought new mahle cylinders for 964 & send cylinder head for refacing to a reputed company, now I need to know if i have to do engine timing differently or I need to measure piston valve clearance separately, as head has been machined ... My engine is 964, 91 Carrera 2.
Thanks