Thread: rattling sound after overheating?

Hello again all.
I have solved the bleeding air from the radiator and the temp is fine now.My problem now is that there is a rattling sound when I accelerate and put a bit more load on the engine.It's fine while cruising but as soon as I accelerate or start going up a hill and put a bit more load on the engine I can hear a rattling sound.It is the same sort of sound an engine makes if the tuning is out and you start hearing a rattly sound when you accelerate or it even sounds a bit like the engine oil is very low but it is full and very fresh oil.Can overheating an engine cause oil pump problems or damage the oil quality.Any ideas would be appreciated.I am hoping it's not main bearings.Cheers Shane

Possibly head gasket failure, but also likely the exhaust manifold bolts need checking for tightness. Sometimes they fall out they get so loose.