99 chevy malibu v6 3.1 engine, head bolt torque is-- 98 through 2001 is step1- 37 foot lbs, step 2- rotate an additional 90 degrees (1/4 turn). the rocker arm bolts are 168-in. lbs.
I do not have a diagram but, you can go to any auto parts store and buy a haynes manual. they are based on a complete tear down of your car, for about 25.00, rocker bolts rotate an additional 30 degrees, after you torque to 168 -in lbs. just did the intake gaskets on my car, and I followed the manual everything turned out just fine.
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Install pushrode and rocker arms and rocker arm nuts. Tighten nuts to 22 ft. lbs. (30 Nm).
Install valve cover and tighten bolts to 89 inch lbs. (10 Nm).
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What engine size, they are three choices.
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