964 Piston ring gaps
 

Hi ,

Does anyone know what the Piston ring gaps readings should be for a MY92 964.

I'm fitting some new ring and want to check the ring gaps before fitment.

thanks
Ian

Found it.... for a 964 C2/C4:

Top and bottom compression ring 0.15-0.3mm were limit 0.8mm

Oil ring 0.15-0.3mm were limit 1.0mm

Those specs are correct.
Here's an interesting question.

0.15-0.3mm wear limit 0.8mm. How many engine builders would install a ring with .030" gap? . Yet that is the top limit Porsche says is usable.

Henry , is that a limit that is not documented, as it seems very tight to me ..if the spec i have found are correct for a 964.

PS: the full gasket I ordered off you a few months ago will be used very soon on the 964 rebuild....

thanks
Ian

Last set of "new" Goetz rings I bought were close to the wear limit. I ended up using the old ones as they were better than the new ones.


-Andy