I need input. I just finished a head gasket replacement on my 94 K2500 Sub. What a job!!!
Primed fuel system and started engine. Life is good at this point. Then, I noticed a sharp rap in the engine that seemed to go from the turbo side to the drivers side of the engine. I shut down looked the thing over from top to bottom. Nothing seemed out of sorts, so I started the engine again and increased speed a bit. When I brought the engine back to idle the noise was not as loud. Any ideas? I don't want to make a minor problem a major thing. Thanks