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What you have labelled as 12,13,14, and 15 are actually the hold-down bolts for the ignition coils for each plug. They do not hold down the cover.
If I remember correctly, the bolts for the cover only go down so far before hitting a shoulder so they can't squeeze the cover too much.
I generally use a "spiraling outward" sequence that starts in the center of the cover and spirals outward, to force any cover deflection outward. In this case I don't think it's overly critical.
I would not put any thought at all into that. They barely torque and that is to avoid cracking the cover. 89 lb. INCH That is just snug using a 1/4 drive handle, not even compressing the rubber under the bolt head.
What you have labelled as 12,13,14, and 15 are actually the hold-down bolts for the ignition coils for each plug. They do not hold down the cover.
If I remember correctly, the bolts for the cover only go down so far before hitting a shoulder so they can't squeeze the cover too much.
I generally use a "spiraling outward" sequence that starts in the center of the cover and spirals outward, to force any cover deflection outward. In this case I don't think it's overly critical.
Steve
The center bolts go thru the cover and thread into the head and actually do hold the cover down in the middle compressing the spark plug area gasket.
02-11-2020, 12:10 PM
