Tails

Check flexplate forward clamp. No movement since I installed with Loctite nearly 2 years ago. Flexplate flat and no gap where I painted splines behind clamp. I tried to take a reading of the thrust bearing clearance, but I was working against the resistance of the flexplate. Approximate reading with magnetic base dial indicator 0.008 to 0.009 TPI, depending on how much force applied with pinch bar. When last I took the reading with clamp loose I got 0.008 TPI.

I check this out, as in a previous thread Bill Ball believes that it should be possible.

Answer is yes, it is possible but you do not get the definative "thunk" as the freed crankshaft bumps up against the thrust bearing. It this case of seting the dial indicator ot zero, apply force taking a reading, no "thunk".

Tails 1990 928S4 Auto

Garth S

Your post prompted me to check my 'history files': I did the loctite 209 treatment on the ex-S4 in Aug, 2003: the coupling never moved at all during the 20K Km put on until selling it in July '06. I serviced the car for the new owner last summer - zero movement, and I expect to find the same result when he returns for a visit this summer.

I also verified the same, constant low value for end float ..... some of which is discussed here. basically, the technique used was to hook a web strap over the top strut brace, loop it down across the front pulley assembly, and tug backwards from beneath the car ... the most rearward position of the flywheel being set as zero on the indicator: push the crank forward to record float ....

Tails

Garth,
Thanks for the feed back and comments.
Tails 1990 928 S4 Auto