Recent content by Red-Z

This sound synchronizes with one cylinder, not a clatter like a bearing

It's a "Toc" sound

I couldn't tell if it was knocking before the repair because the blown head gasket was too loud. There is no engine oil gauge, just a warning light, but no warning. Valve lifters are quiet. It's a tap/knock sound and I can probably record it and convert to a wav file.

It sounds louder from above the engine than underneath. It sounds louder from the front of the engine than the rear. It was the rear head gasket that blew and was replaced. what else could it be?

I drove 30 milesbefore repair. Shop thinks it may be a deformed wrist pin, but I don't trust this advice since it is often a misdiagnosis. What else could it be?

A local auto shop replaced the rear head, head gasket, and did the valve job. The sound is louder overhead than it appears underneath. It sound louder in the front than the rear.

My wife has a '95 supercharged Riviera. The engine became overheated and blew a headgasket. After repairs, the engine has a loud knck with the frequency of a valve tap. Can anyone help me diagnose this?