Adjusting stock rockers
#1
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Adjusting stock rockers
Just to be sure. You just tighten all the rockers to 22ft.lbs regardless of lobe position right? I just took my rockers and pushrods out to inspect them but didnt rotate the engine at all.
Thanks,Chris
Thanks,Chris
#4
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Man, I guess I did mine wrong then. I just left the timing chain dot to dot & dropped in the pushrods then rockers. Tightened them all down one side at a time. I haven't had a single issue yet & it's been together for a year of daily driving.
And stock rockers aren't adjustable just incase you didn't know for sure.
And stock rockers aren't adjustable just incase you didn't know for sure.
#6
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The procedure is designed so there is less stress and tension on the parts while tightening. If you are up on the lobe, you must overcome the spring pressure while torqueing the bolt. If your are not going to rotate the engine per the instructions, after you slowly tighten each rocker to 22 lb ft, disable the fuel pump and crank the engine at least one revolution to check the movement of the rockers and then re-torque each one.
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The procedure is designed so there is less stress and tension on the parts while tightening. If you are up on the lobe, you must overcome the spring pressure while torqueing the bolt. If your are not going to rotate the engine per the instructions, after you slowly tighten each rocker to 22 lb ft, disable the fuel pump and crank the engine at least one revolution to check the movement of the rockers and then re-torque each one.
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#9
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You need to define "aren't right". If the rocker is bottomed and the bolt tight enough to keep it there, then the rocker should perform correctly with no power loss. If it is physically loose, then it won't.
The GM procedure, from what I can tell, is done the way it is for two reasons. First, it provides better and consistent preload of the bolt. Second, it prevents driving the valve into the piston on any cylinder whose piston is at the top since the lifter won't bleed fast enough and the valve will instead open.
The GM procedure, from what I can tell, is done the way it is for two reasons. First, it provides better and consistent preload of the bolt. Second, it prevents driving the valve into the piston on any cylinder whose piston is at the top since the lifter won't bleed fast enough and the valve will instead open.