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This can be a messy job so put some cardboard on the floor under the vehicle. They also sell clips that attach to the rocker arms to help keep the mess to a minimum. Warm engine, turn engine off, remove one side valve cover, attach clips if you have them, start engine, using a 5/8" deep socket start on one end and loosen a rocker nut until you hear the rocker clatter, turn rocker nut back in just until the noise stops, then continue turning the rocker nut in 1 full turn gradually 1/4 turn at a time. If you go to fast you will hear the engine stumble, go slower. Do this to each rocker on one side. Turn engine off, remove clips, replace that valve cover, remove the other side valve cover and repeat proccess. Factory specs call for one full turn in on the adjustment but some mechanics do less for their own personal reasons.

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Q: How do you adjust valves on a 1979 Chevy Malibu small block 350 engine?
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