964 'notch' in steering

[betakoen]

I'm new to the forum, and must admit I mostly work on Italian Machenery, but can appreciate the 911 too!

I good friend of mine owns a 1991 964 carrera 2, and we've done quite a bit of work on it in the mean time.

Now we've encountered following problem:

When we turn the steering wheel clockwise, at a certain point (a bit before wheels straight position) we feel a little 'notch' in the steering. It like while turning clockwise you built up a little pressure, and at a certain point 'hop' over it. (hope this describes the problem)

The problem is only present with the engine running (so power steering on) and wheels on the ground.

engine of, no problem present either wheels on the ground or of.

The steering rack was proffessionaly overhauled six months ago, and three months ago this problem became apparent. After a lot of test on request of hte overhaul company, eventually the rack was dismounted again and overhauled again and tested on their testing rig, however they could not find a problem. After re-installation the problem is still present.

All oil lines where flushed, reservoir was cleaned and flushed.

Has anyone encountered this problem and knows a possible cause?

The problem is only present on turning clockwise, anticlock gives no problem at all.....

Thank you for reading!

Koen

[wvicary]

Have you inspected the steering shaft coupler assembly or front suspension strut upper bearing mounts?

Edited February 15, 2012 by wvicary