|
Over a period of time running, through normal were, the valves will beat into the seats. Therefore closing the distance between the cam and the valve(or valve bucket, or lifter, or whatever style valve train you have) that's why it's important to check your valve lash periodically and reset it as needed. I'm not saying that is your problem, but I'm just giving you the reason why being a stock engine doesn't mean that the valve aren't too tight.
__________________
Casey Meyer
|