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The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. Torque values assume clean, dry threads.
Never have used torque specs. Keep in mind. If the plug has a metal gasket, snug it down, add 1/4 turn. If the plug is beveled, snug it down add 1/16 turn. But I believe the torque is 17 foot pounds.
you have torque cylinder head bolts in 3 steps first torque bolts 14 ft lbs then second torque all bolts to 43 ft lbs step three torque all cylinder bolts to plus 90 degrees.
unimportant. use 1 hand and just snug it up. not real tight , just a little pressure past the stop. i never seen a spark plug wiggle loose, since the spark plug wire doesn't allow it to spin
you have a bad valve cover gasket/ spark plug o-ring i assume the plug is set in the head with valve cover above it since there is oil in the cover gaskets and o rings are used to seal in oil remove and replace gaskets be sure to find the right torque spec for the cover bolts also remember to start with the center bolts and work your way evenly to the outside
Engine off
Remove one spark plug wire / using correct size spark plug wrench with / rubber boot designed for spark plugs (deep well socket with rubber boot) remove (1) spark plug / gap new replacement spark plug to specs / install replacement spark plug by hand into head of engine /finger tight /using spark plug socket and rachet finish tighting spark plug / tighten just beyond snug being careful to not over tighten and breaking spark plug ..if in doubt about the proper tighting consult motor manual for torque specs. use torque specs in conjunction with appropiate torque wrench . Re-install removed spark plug wire ...proceed to remaining spark plugs doing one at a time until completed.
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