Quote:
Originally Posted by VFR750
Good to hear your son is helping.
When you say a loss of contact between the rocker and the cam lobe, I am going to assume you mean, as the cam profile decreased, the valve stayed open, the rocker was loose, and then the valve closed some and took out some slack?
Please explain exactly what was happening verse what should have happened. Intake or exhaust? During opening or during closing?
My first thought is the valves are sticking in the guides, maybe?
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Mike,
We have been observing closely the left bank (1-2-3) and noticed the intake rocker arms making the noises during valve closing when the cam start to decrease in height. And you could observe a sudden movement of the intake rocker arm/s as it comes in contact with cam lob. My son's first reaction was that I might have the wrong valve springs.
But it never occurred to me about 'sticking valves'. Now that you mentioned it, I will focus on this problem. If sticking valves are the culprits, why it did not occur previously? So far, I am very interested and concerned about it. Will do further observation to evaluate 'sticking valve' phenomenon. Will keep you posted. Thanks.
Tony