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
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