Cylinder Head Assembly
SURFACE VARIATION - HEAD-TO-BLOCKCheck block deck surfaces for flatness. Deck surface must be within service limit of 0.1 mm (0.004 in.).
CYLINDER HEAD TORQUE & SEQUENCE
CAUTION: The cylinder head gaskets are not interchangeable between cylinder heads and are clearly marked right or left.
Tighten the cylinder head bolts in the sequence shown using the following four step torque-turn method:
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
CAUTION: 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 must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced. Failure to replace a damaged bolt may lead to possible engine damage.
INTAKE MANIFOLD
Intake Manifold - Lower-Bolts 28 Nm (250 in. lbs.)
Intake Manifold Upper-Bolts 12 Nm (105 in. lbs.)
(Tighten bolts gradually starting in the center working outward)
Camshaft Bearing Cap
Camshaft thrust plate - Bolts 28 Nm (250 in. lbs.).
EXHAUST MANIFOLD
Exhaust Manifold to Cylinder Head Bolts 23 Nm (200 in. lbs.)