Tighten rocker arms question
Tighten rocker arms question Hey guys I just put in new pushrods and know I need to torq the rocker arms to 22 ft pounds rotate motor 180* then re torque at 22ft pounds again but my question is do I need to do anything special in the order I tighten them or just torque them down?
Dan
Dan
Actually , the way it works is that you put piston # 1 on TDC and tighten the rockers that are on the base circle of the cam. I don't remember which rockers they are but it's the ones that aren't pushing down the valves. Then you rotate the crank 360 degrees and tighten the others. The reason for this is that the cam only turns 1/2 as much as the crank.
Originally Posted by bigdsz
Actually , the way it works is that you put piston # 1 on TDC and tighten the rockers that are on the base circle of the cam. I don't remember which rockers they are but it's the ones that aren't pushing down the valves. Then you rotate the crank 360 degrees and tighten the others. The reason for this is that the cam only turns 1/2 as much as the crank.
Originally Posted by vettenuts
I would prefer to use this method also, if at TDC cylinder #1, does anyone know which are on base circle and the rotation/base circle relationship?
This is out of the GM engine build manual. TDC fire, tighten exhaust 1,2,7,8, tighten intake 1,3,4,5. Rotate crank 360 degrees, tighten exhaust 3,4,5,6, tighten intake 2,6,7,8. This will stress the rocker bolts the least.
