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1992 Alpha 1 knocking noise

Kurt30701

New member
Hello,

We just rebuilt out 1992 Alpha I Gen II motor (5.7L) and put a new water pump and oil in the out drive. All has been well until about 7 hours of operation the drive has developed a noise that sounds like someone is hitting it with a ball peen hammer at or very close to engine speed. It is not the deep down knock like comes from a rod bearing, but more than just a tap, tap, tap. We didn't pull the drive out yet, does anyone have a suggestion of what to look for first before pulling the drive? The drive is original, we replaced the water pump and changed the oil and that's it.

Ideas?

Thank you all very much!

Kurt
Calhoun, GA
 
Thanks, I am looking for causes of the noise from the out drive. That is where the noise comes from. The engine appears to run fine and is quiet.
 
Before you pull the drive run it on the hose and determine if it is the upper or lower.

Remove the drive and fire up the engine, see if the noise goes away. Just to confirm it is the drive.
 
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