from what youve said i would want to check that cam belt. Dont drive the car until rectified. Might cost you your top end.
i have ordered a cambelt kit today just to be on the safe side and i am going to buy the disc also but do you need a cam locking tool to change them or can it be done without???if i need one can you rent these from tool hire companys???
if it costs too much i might scrap 
as i have had my car since june and it has cost me a fortune on replacing interior(twice),cam cover gaskets,head gasket!!!and it now needs a new exhaust,front and rear discs as the front are warped,chrome trip on back bumper and rear passenger door moulding as when you open the front passenger door it catches on the trim and it is now bent back and sticking out 
I wonder if the cambelt was done properly when the head gasket was changed ... might be the cause of the problem ??
cambelt is fine,sounds like a valve knocking ::)but doesn't really start knocking until car is warm? Any other ideas please
:-/
Well, in the old days "tapping" noises were caused by the tappets being out of adjustment, and I reckon a cam that is faulty could cause a louder sound than this.
But "knocking" as you describe was usually down to 'big end' failure, which would get worse as the oil thinned with heating and the metal expanded likewise as the large bearing oscillated on the crank shaft, or worse still seperated completely from it due to rod / bearing failure.
However, I am led to believe that in this age it is very rare for big ends to fail as they once did, with the bearing shells and piston rods etc being manufactured to higher specifications. 8-) 8-) 8-)
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Topic: Help please!!Loud Knocking sound (Read 1371 times)