Well, here I am after quite a long absence, mostly due to being bummed out about how long and difficult my engine rebuild (under warranty)took and then due miscellaneous other stuff diverting my attention. I needed to take a break from the truck project for awhile.
Anyway, the engine is back in running fine but the above mentioned clutch clinkity, clinkity, clinkity, noise is still there. I need some expert opinion and help from you guys, as I'm pulling the engine again tomorrow. The following pretty much sums up what was done previously and what the symptoms are:
- Block bored true for new slightly oversized OD pilot bushing
- New Pressure Plate, TO Bearing, Fork, Ball, Clutch Disc installed.
- As mentioned in previous post all adjustment was taken up on clutch linkage and clinkity noise was only heard when the clutch pedal was fully depressed.
Prior to engine reinstall the other day the following was done:
- Flywheel surface machined as upon inspection LAST January a small rub spot "heat checking" about size of a dime was noted on the friction surface.
- Another new Throw-out bearing installed
- Upon restart and testing today it was noted that the noise is only present at about 1/2 clutch pedal depression or just about when pressure plate release levers are more or less flat and about the time disc release starts. Noise goes away upon full depression.
- Inspection with engine running and working clutch I could not feel any vibration being transmitted to throw-out bearing and clutch fork was steady. TO bearing feels smooth and rotates without any discernible shock vibration. I had engine running and was under cab with my fingers on bearing during clutch operation.
- Clutch linkage nut thickness was ground down to about half original to provide a tad more adjustment. No change in noise or point at which is occurs.
- Transmission shifts fine with no signs of grinding, clutch slippage, chattering, etc.
This noise sounds pretty much like a pressure plate held in your hands would would sound when shaken. A rattle is heard from the alignment castings (the square nubs on the pressure plate) banging on the square holes of the pressure plate housing.
The only good thing about this whole deal is that now the noise is transient, only occurring during shifting and is not present when I'm stopped with the pedal depressed. It was so loud that it attracted attention and not the kind that I would like.
Any ideas, help, suggestions would be greatly appreciated.
Don
