justin_o_guy
Ex Member
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[The reason the valves get louder when hot is the head is aluminum and the valves are steel. When I did a thermogrowth of the cam chain versus the cylinder the diference was ~.015".
So, the head being aluminum grows more the the valves.
Okay, I am trying to visualize the head, cam, rockers & valves. The cam sits in aluminum bearing surfaces cut ib the head. The rockers are mounted to,,, what? ( my minds eye goes blind right there) Then, the rockers slap down on the valve end when the cam lobe comes up & hits the rocker.
Now, aluminum expands more than steel, ( I happen to know that because you said so, else I would be guessing) Okay, Now, IF the part I cant visualize just happens to be on top of the hottest part of the engine, & I think it is, & IF that part gets taller, then it would increase the gap on each end of the rockers! Making it tick harder. Well,, since it does that about every time I ride, I guess if its hurting it, it will just have to die an early death, cuz I am not gonna stop riding when I hear that extra Tick, I will let you guys know if I lose an angine over it.
Ver, thanks man, those answers that include scientific fact really help me understand things,. Maybe I will & maybe I wont actually use what I learn, but that doesnt mean I dont appreciate the info,
Of course, If I have got this figured out wrong, I hope you can explain it so i can "get it", I may be a hundred miles off here.
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