Originally Posted by mr.fordneck

When my truck is sitting at a light or at idle, the engine produces a knocking sound. I do not think its a suspension part since I am sitting still. I checked my oil and its not low. It is a hollow sound but sounds like metal to metal. 1990 5.0 efi. Just had a new head gasket and intake put on and valve job professionally done so I think they'd tell me if my pushrods were bad. Plus they looked fine whe I saw them. It sounds like this 1990 F150 5.0 V8 engine clanging.MPG - YouTube but much quieter. Please help. Truck has not run any different than normal