Rocker Bolts?
Rocker Bolts? so... I took my valve cover off and i took the rockers off because i thought my push rods were makin a noise so i popped off the rockers and checked them all... no bends so I put it all back totether... torqued the bolts to 22 ft lbs and put it all back together... started it up and it started knockin... a few of the rockers had come loose... so i took em off re-torqued it down and did it again... again a few more rockers came loose... so i started the car with the valve cover off and watched it... ahgai na few more came loose so i torqued them down and craked it over again and eventually they all got tight...but what made these bolts back off? valve position? it seems ok now what should i do?
Try Locktite! I would try cleaning the threads in the threads/holes and use a little blue locktite.
BTW, I had one come loose and I thought it was a rod brering it was so loud.
Bob K.
BTW, I had one come loose and I thought it was a rod brering it was so loud.
Bob K.
i mean i torqued the ones that were givin me a problem to 30ft lbs lol and they are holding i just dont want them to back out... so red or blue locktite and how much of it?
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Loctite won't hold unless you, a) clean the bolt, b) clean the bolt hole. Otherwise its a waste of time. Overtightening is a recipe for disaster. Remove all rockers, clean all the bolts and the bolt holes (keep them in the correct position when off the car). Rotate the motor to TDC on #1 and then follow the GM procedure tightening to 22 lb-ft the correct rockers, rotate the crank 1 turn and then do the rest. Use Loctite 242 (medium strength).
Originally Posted by vettenuts
Loctite won't hold unless you, a) clean the bolt, b) clean the bolt hole. Otherwise its a waste of time. Overtightening is a recipe for disaster. Remove all rockers, clean all the bolts and the bolt holes (keep them in the correct position when off the car). Rotate the motor to TDC on #1 and then follow the GM procedure tightening to 22 lb-ft the correct rockers, rotate the crank 1 turn and then do the rest. Use Loctite 242 (medium strength).
actually now that i think about it.... if i torque down the rocker bolts to 22 ft lbs and start the car of course some will be loose because i torques some down at the highest expansion point for the springs and then when the springs compress the rocker just kinda flails around....and unseats and becomes loose... so if i torque them then crank the car via key and crank them again and then repeat untill i can let it run without any tapping that should work right?
Originally Posted by WS6WRX
or you could just put a socket on the crank and turn until the rockers are in the right position, ensuring that each one if torqued correctly.
I did it this way following the firing order (see the cam install guide at LS1howto.com). I put the #1 cylinder at top dead center and torqued down the 4 rockers on 1 & 6, rotate 90, then do 8 & 5, rotate 90, then do 7 & 4, rotate 90, and finish up with 3 & 2. Rotate the motor over by hand a couple times and then double check the torque using the same process. Some will say this isn't necessary. But, it helps me with piece of mind. 