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-   -   3.6 cam housing stuck to heads (http://forums.pelicanparts.com/911-engine-rebuilding-forum/372653-3-6-cam-housing-stuck-heads.html)

drola 10-17-2007 01:49 PM

3.6 cam housing stuck to heads
 
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?

http://forums.pelicanparts.com/uploa...1192654128.jpg

1972_911T 10-17-2007 01:51 PM

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 10-17-2007 02:10 PM

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 10-17-2007 02:30 PM

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 10-17-2007 02:31 PM

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 10-17-2007 03:34 PM

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 10-17-2007 03:48 PM

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 10-17-2007 04:36 PM

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 10-17-2007 04:54 PM

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 10-17-2007 05:01 PM

makes total sense.
thanks


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