ricks993

Starting the rebuild process on my 1995 non turbo and was looking to see if I should replace the cam bearings. But when I look in the parts listing I do not see a listing for cam housing bearings, or are they called bushings????

Anyone replace them on their rebuild, or maybe they are not replaceable???

race911

In the cam tower? Just the machined aluminum, with the four cam journals riding against them.

ricks993

Yes in the cam tower. So they are not replaceable.

Steve Weiner-Rennsport Systems

There are no bearings in the cam towers on 911 engines; the iron cams ride directly in the alloy housings.

nine9six

EDITED 5-25-15
Proper clearance can be verified with an extended telescoping gage to assure proper clearance is within prescribed tolerances.

Quadcammer

I would think you would use a dial bore gauge as plastigauge is a bit bush league

nine9six

EDITED 11-25-15
Quad,
Given the configuration of the head/valve train, you are absolutely correct, but not for the reason of the methodoly being, "bush league".

An extended snap/telescoping gage would also be a simple, and more economical method for verifying/measuring cam journal bores.

Ed Hughes

Paul, there is no torquing. The cams slide straight into the cam tower from the end. You would have to use instruments to measure.

nine9six

Ed, you are correct given the configuration of the head/valve train.