3.6 cam housing stuck to heads

[drola]

i'm trying to get my heads apart but they are very stuck to the cam housings. i don't want to over do it and break something.
so how can i seperate the heads from the cam housings?

[1972_911T]

Are you sure you have loosened all the bolts?? from memory I thought you had to remove the rockers and to get to them all? May be wrong though

Steve

[dtw]

Do you count 24 fasteners removed per side (24 up to 3.2, not sure if same for 964/993)? If so sometimes the locating dowel and the glue really freeze things up. I use a rubber mallet to just go around and around the assembly, rapping until the pieces start to let go. For hard to reach places, I use a piece of soft wood about a foot long and beat that with the mallet. If you got all the fasteners, it'll come apart.

[drola]

911t was right. i need to remove the rockers to get to the other nuts. now, do i need to keep track of which rocker came from where or does it not matter when i put it back together?

[drola]

i should add that the first rocker i took off looks like new. should i etch 1I, 1E, 2I, 2E, etc on each one respectively?

[911pcars]

I wouldn't scribe it. It could create a stress riser that could lead to a failure - same with any part under mechanical stress. Instead, use a cardboard label and attach it with wire or plastic tie wrap, bag it in a zip lock and ID it, or some other non-destructive labeling method. Make sure it goes back with the same cam lobe. They create compatible wear patterns on one another. The rocker shaft, less so.

Sherwood

[dcriss]

Ya, I agree with {911pcars}. I put all of mine in zip lock bags and labeled (#1 intake, #1 exhaust and so on).

Good Luck

[drola]

hey guys, thanks for the tips. very appreciated. this is my first rebuild and these threads have been invaluable.
while tearing down i figured that they should probably go back where they came from. i'm glad i didn't just pull them all off.
another question i have is about torquing the rocker shaft bolts. how small of a torque wrench do i need when reassembling them? i can't even get my 1/4" drive w/ socket and hex bit in there to take them off, much less a torque wrench.

[911pcars]

Not sure about the torque off the top of my head. Should be in all the rebuild books.

For installation, begin with the rocker arm closest to the fan. Use a long socket extension and hex driver through the open end of the cam housing. Install in this order: No. 1, 2, then 3. Apply anti-seize to rocker arm bolt/nut threads.

Sherwood

[drola]

makes total sense.
thanks