Cylinder Head Assembly

CYLINDER HEAD TORQUE & SEQUENCE










Tighten the cylinder head bolts in the following sequence, using the 4 step torque-turn method. Tighten according to the following torque values:
Step 1: All 61 Nm (45 ft. lbs.)
Step 2: All 88 Nm (65 ft. lbs.)
Step 3: All (again) 88 Nm (65 ft. lbs.)
Step 4: + 90° Turn Do not use a torque wrench for this step.

Bolt torque after 90° turn should be over 122 Nm (90 ft. lbs.) in the tightening direction. If not, replace the bolt.

HEAD BOLT REUSE/REPLACE






The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced.

INTAKE MANIFOLD TORQUE & SEQUENCE

Lower Intake Manifold










Install intake manifold bolts and gradually tighten in sequence shown until a torque of 28 Nm (250 in. lbs.) is obtained.

Upper Intake Manifold






Tighten bolts gradually starting in the center working outward until a torque of 12 Nm (105 in. lbs.) is obtained.

EXHAUST MANIFOLD

Tighten fasteners to 12 N.m (105 in. lbs.).