mud was on the display and everywhere else and overheated the motor probably more than once.

It was eating cooling fluid from radiator and overflow. Never saw it pour out tank or steam.

Now it has a knock around cylinder bore area, not on top side or underneath.

Front is louder than rear cylinder. I checked valve clearance and it's within spec.

Sound like bad head gasket and warped cylinder?

Ordered a service manual today.

 

is it a knock or a a taping..maybe you warped a valve

 

Sounds like a rod bearing going in a 350 chevy. Not real loud but it's a loud knocking.