Valves are not tourqued. There are no bolts on them at all. they are held in by keepersAnswerI believe what you are asking is "how do you torque the rocker arms" on a SB Chevy. As long as it is mostly stock, and not using solid lifters, the following is the proper method for setting the torque.
Start the engine and let it warm for at least 15 minutes, then shut down the engine.
Remove the valve cover on one side (does not matter which) and restart the engine.
One valve at a time, loosen the nut holding the rocker arm down until it starts to "tick", then retighten the rocker arm slowly until the ticking stops. At this point then turn your wrench slowly 1/2 to 3/4 turn more, and your done. Move to the next rocker arm and repeat the prosses until all 4 cylinders (8 rocker arms) have been properly torqued.
When you have torqued all the rocker arms on the one side of the engine, stop the engine, clean up the oil that will have spurted all over and made a mess, replace the valve cover complete with a new gasket, and then move the other side of the engine repeating the prosses for all the rocker arms on that side.
It sounds simple, and in fact it really is. Just remember to go slowly when you are tightening the nut holding the rocker arms in place, and to check the oil when you are done. It's messy so you may want to let the engine cool after you are done and clean it up with soap and water.
I would just like to add that there are valve clips that you can buy that fit on the top side of the valve, so that a minimal amount of oil will be lost. I like this method of adjusting.
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