Cylinder Head Torque Specifications

The cylinder head bolts are torqued using the torque-to-yield method. They should be examined BEFORE reuse. If the threads are necked down, the bolts should be replaced.





Necking can be checked by holding a scale or straight edge against the threads. If all the threads do not contact the scale, the bolt should be replaced.

Fig. 31 Cylinder Head Tightening Sequence:

1. Tighten the cylinder head bolts 1 through 8 in the sequence shown. Using the 4 step torque turn method, tighten according to the following values:
^ First - All to 61 Nm (45 ft. lbs.)
^ Second - All to 88 Nm (65 ft. lbs.)
^ Third - All (again) to 88 Nm (65 ft. lbs.)
^ Fourth - + 1/4 turn.
(Do not use a torque wrench for this step)

NOTE: Bolt torque after 1/4 turn should be over 122 Nm (90 ft.lbs.). If not, replace the bolt.

2. Tighten head bolt number 9 to 33 Nm (25 ft.lbs.) after head bolts 1 through 8 have been tightened to specifications.