964 cam housing holes???

[dan67]

hi All, I'm rebuilt my 964 engine (M01/89 WHIThout heads gaskets..) on the cam housing there are two holes that do not know what they are what they are?

oil breather?
lubrication chain ramps?

on the manuals / drawings also on the net I have never seen these holes....

thanks ALL for the answers

dan

[dan67]

----help!

[billjam]

Dan,
This probably doesn't help, but my 1992 M64/01 engine doesn't have those holes.
Check which engine type is stamped on the case where the temp sensor is sitting in my picture. It should be M64/01 for all 89-94 964's unless it is a tiptronic, RS or turbo.

[dan67]

hi billjam
and very thanks!
yes my engine is M64/01 first series 1989, I'am to rebuilt for fit on 3.2 body....
the problem is what are those holes, I would close the chains and do not know whether to leave the holes so or cap them and I do not remember when I unmounted if they were already empty))

I see that you do a transplant 3.6 ... there are many 3d ... but I'd like to share some information

very thanks! GRAZIE!

[Tom '74 911]

Hi Dan,

I had my '90 3.6L engine rebuilt last winter after doing the tear-down myself. Here are a few photos I took where you can see the same holes. Hard to 100% certain, but it looks like they are left as-is on mine? I don't remember noticing them... do they go all the way through?

Tom

[dan67]

hi Tom and thanks!
Apparently not actually go anywhere....I do not know if you leave them open or close them...close them with Loctite or similar

[crg]

dan
i'm currently rebuilding my 89 964 as well. I have those same holes, there is nothing I can think of that would go into those. mine will be left as is...

[porterdog]

Try asking the smart people in the Rebuilding forum- you may be more likely to get an answer there, some of the contributors have seen the inside of lots of pcar motors.

[wilson234]

I'm rebuilding an 89 as well, I'm not sure if my engine has had any retro fit from Porsche regarding the cylinder head gaskets. If not I was not planning to upgrade assuming there's nothing warped.

Is there a better idea, what are you guys doing??