964 3.6 cam tower on a 3.2

[Harveymushman82]

Can anyone tell me if a 3.6 cam tower will fit on a 3.2?

[Walt Fricke]

Harvey - you might move this to the 911 Engine forum.
I think the 3.6 tower will bolt up to the earlier engines, but the issue is the cam chain system, which is somewhat different, and doesn't use the external oiling lines. So no, it isn't a straight across the board swap. There would have to be some modification to get oil to the cams.

I'd like to have this later tower, because it has to make dealing with rockers a whole lot easier, since the shafts just bolt on. I've never seen a kit or write up on doing this change.

[group911@aol.co]

Walt
I don't think the bolt on rockers came until the 993??

Originally Posted by Walt Fricke

Harvey - you might move this to the 911 Engine forum.
I think the 3.6 tower will bolt up to the earlier engines, but the issue is the cam chain system, which is somewhat different, and doesn't use the external oiling lines. So no, it isn't a straight across the board swap. There would have to be some modification to get oil to the cams.

I'd like to have this later tower, because it has to make dealing with rockers a whole lot easier, since the shafts just bolt on. I've never seen a kit or write up on doing this change.

[targa72e]

Correct. Oil delivery to cam towers is the same for 964 and 993. The chain ramps and tensioners are very different. 993 Cams tower are very different with the advantage of bolt on shafts that are pressurized instead of relying on splash lubrication.



Ramps and tensioners were totally different.



993 Rockers also had a small hydraulic lash assembly in the end of the Rocker. This is the reason the shafts had pressurized oil (to feed hydraulic lifter)




964 uses standard rockers like early cars.

That said Supertec has a mod to 964 cam towers to allow them to be used on pre 964 engines. They add threaded insert to 964 cam tower oil feed. Late 3.2 engines had 964 cam tower castings with larger (standard size for 3.2) valve cover studs. I have a set of these with modified billet valve covers that are large stud but use the rubber 964 gasket.

lots of info in engine building forum.

john

[Cory M]

I've got a pair of 3.2 cam towers I can sell if you need them. Mine are from an '88 Carrera with the 964 part number described above.