This is serious!!! Using a long screwdriver place it on the intake manifold, valve covers, etc to determine where the sound is coming from. Place your ear against the other end. You will hear more about your engine than you ever expected. If the knocking is heard on top then go to the bottom. If you hear the noise there you have big problems called bad bearings. Not much you can do if this is the case except repalce the bearings or probably better yet, replace the engine. Sorry about the diagnosis.
Answers & Comments
This is serious!!! Using a long screwdriver place it on the intake manifold, valve covers, etc to determine where the sound is coming from. Place your ear against the other end. You will hear more about your engine than you ever expected. If the knocking is heard on top then go to the bottom. If you hear the noise there you have big problems called bad bearings. Not much you can do if this is the case except repalce the bearings or probably better yet, replace the engine. Sorry about the diagnosis.
hardrocko
Thanks for using FixYa and the generous rating.