I get a rattling sound from the engine on start up specialy when I accelerate or when I llet go of the accelerator and the engine decelerates. It happens with the transmission engaged or in neutral. Then after I drive for 5 minutes the sound disappears and only faintly heard occasionaly. Once the engine is at a certain rpm or freeway speeds no noise. Again, mostly happens first few minutes from a idle rpm to rev up/down. I thought it could be the chain tensioner...but they say that rarely fails. If it is the tensioner...why does it do it when cold and the first few minutes and not later on? If I remove the vaulve covers what should I look for? I know I could press on the chain sprocket to see if its firm. Should I take the tensioner apart, clean it and put it back together...maybe it has crud iin it? Finally, how do you "prime" it?
thanks in advance
abe