Pete L

I have 86 5-speed. I removed the clutch last year and replaced the cup bushing, guide tube and pilot bearing. The cub busihing had failed. The pressure plate, TOB, and discks were in good condition and simply reinstalled. I do not know if i reinstalled the pressure plate with the same orientation on the intermediate plate as when it was removed. CLuth itself is working perfectly.

Now have a vibration that shakes the car from 1400 to 1800 RPM or so. I replaced engine mounts three years ago, looked at them, do not appear collapsed. Alss, as a test, installed Jagger Spead mounts. The vibration persists.

Any ideas?

Thanks in advance

Erik - Denmark

Pete,
Did try with the double RPM?
Many 928 has 3000 RPM vibration and a veaker one with 1500 RPM
Regards from Erik in Denmark

Pete L

Erik

Yes, vibration at 1,400 (literally the car feels as if it is shaking up and down) and less pronounced but also there at 3,000 RPM.

I know it sounds like motor mounts, but the engine still "rocks" when manipulating the throttle in the engine compartment

Erik - Denmark

Pete,
I have been working quite a lot with these, and now it is almost nil
Some theories said that starts from the trans shaft, maybe, maybe not - up to now I have not touch the trans shaft - Will come later
What I did up to now:
New engine and gearbox mounts
Installed the old model engine hydraulic dampers on the engine and also on the gearbox
The result is that I can hardly feel when I pass the 1500 and 3000-RPM area
Regards from Erik in Denmark