Last straw

[Rawze]

(10-15-2019 )Brock Wrote:  ...
When you tighten the head bolts down, isnt it torque plus? If so, what number would you be torquing it to the next day?

The manual says to torque the head bolts in increments 75 ft-lbs, then 150 ft-lbs, then to 300 ft-lbs. Then add an additional 90 degrees on the head bolts as a final setting.

-- Instead of doing what the book says ....

Start out by torquing the head bolts in increments 75 ft-lbs, then 150 ft-lbs, then to 300 ft-lbs, same as book.

-- THEN let the head sit over night so the gasket can crush.

THE NEXT DAY, Re-torque the head AGAIN to the 300 ft-lbs a second time after the gasket has had time to crush. - It is not unusual to get another 1/4 to 1/2 turn or more sometimes out of them to get them back to 300.

AFTER THAT, Then add the additional 90 degrees on the head bolts for the final setting.

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BTW: just for reference, the final overall tightness after turning them that last 90 degrees will be roughly around 480+ ft-lbs (sometimes almost 500) or so on most of the bolts, if not a bit more.