Knock on top end of engine
Not sure if it the top end of the engine or might be the bottom end small bearings. It is knocking at about 1500 rpm and then goes away above or below that rev range. I couldn't check the oil as it was dark but it has Mobil One 10W40 in it. The head gasket was done recently and the camshaft seal had to be done again after that as it leaked would that have caused the cam to be starved of oil? The car seems to pull fine and sound perfect too. Other than that noise at 1500 rpm.
Hopefully it just needs oil or something.
What do ye all think?