Hi Earl:
Since the valve cover is not subject to mechanical loads like connecting rods or main bearing caps, tightening to an exact torque is not usually an issue.
The important thing is to have the parts clean prior to assembling.
Make sure the gasket is properly fitted, and apply sealer as recommended. I would just run all the bolts in until light contact is made, then starting at the centre, gently snug them down. If you pretend you're following an increasing spiral (same idea as head bolts) and repeat several times, you'll find that a "point of resistance" is reached that indicates they are done. It comes with years of experience, and breaking one bolt because you overdid it.
SOURCE: amount of torque on valve cover bolts
it's 12 nM which appears to convert to about 9 foot lbs of torque.... if your torque wrench has nM use that.
Robert
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SOURCE: torque specs for valve cover
Tightening Specifications:
Cylinder Head Covers - Bolt
12 Nm (105 in. lbs.)
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