Cylinder Head Torque and Sequence

Cylinder Head Bolt Tightening Sequence:

Tighten all bolts in numerical sequence, as shown, in three steps as follows:
- 20 Nm (15 lb.ft.)
- 40 Nm (30 lb.ft.)
- 50 Nm (37 lb.ft.)


Caution: In the following steps, do not loosen all of the bolts at the same time. Work on one bolt at a time in the sequence shown. Failure to loosen bolts in proper sequence could cause cylinder head to warp.

In numerical sequence, loosen, then retighten each of the bolts as described below.

For Long Bolts:
a. Loosen the long bolt and back out 2 - 3 turns.
b. Retighten the long bolt to 40 - 50 Nm (30 - 37 lb.ft.).
c. Rotate the long bolt an additional 175° - 185° (approximately 1/2 turn).
d. Go to the next bolt in sequence.

For Short Bolts:
a. Loosen the short bolt and back out 2 - 3 turns.
b. Retighten the short bolt to 20 - 30 Nm (15 - 22 lb.ft.).
c. Rotate the short bolt an additional 175° - 185° (approximately 1/2 turn).