pknowles
RETIRED
In the second video where ever you started is where the knocking is coming fromI did see trash/metal in the filter when I removed it just now. Never seen it before. I have a K&P and when I pulled the element out of it trash/metal was in the cup (not inside the filter element). I will post a picture of the inside of the filter cup later today so everyone can see. I think I may have a bigger problem.![]()
Hopefully a better ear will come along and give you some guidelines to check by. Personally I wouldn't run anymore until you fix the problem. The metal shavings in the filter might give some clue.good luck