If it's a slow knock sounds valve train related as it moves half speed of the bottom end.After 10 months of sitting, I finally got the motor and transmission back out of the car. 1000 miles after the rebuild and i got some kind of slow knock. It was RPM related, but didn't sound as fast as a rod knock usually would. Compression and oil pressure were fine. No metal in the oil at all. Going to do some more digging this evening.
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