Quote:
Originally Posted by thisisme1371
I have a friend that has a 99 4runner that has some valve noise dose anyone know the specs or even what kind of valve they are. I have heard that they are self adjusting
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Pretty sure they are the bucket-over-valve design like most of the older Toyota engines. Each cam lobe has to be measured at cold temp for the gap between the cam lobe and the top of the bucket. If it's too loose, then the bucket will need to be changed for a 'taller' one. If it's too tight, then it'll be changed to a 'shorter' one.