Cylinder Head Assembly: Specifications

CYLINDER HEAD BOLT TORQUE/SEQUENCE





Tighten the cylinder head bolts in the sequence shown. Using the 4 step torque turn method, tighten according to the following values:
- Step 1: All to 34 Nm (25 ft. lbs.)
- Step 2: All to 68 Nm (50 ft. lbs.)
- Step 3: All to 68 Nm (50 ft. lbs.)
- Step 4: Turn an additional 1/4 Turn. Do not use a torque wrench for this step.

CYLINDER HEAD SURFACE VARIATION





Cylinder head must be flat within 0.1 mm (0.004 inch)

CYLINDER HEAD BOLT RE-USABILITY





The Cylinder head bolts 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.

CAMSHAFT BEARING CAP TORQUE/SEQUENCE




Camshaft Bearing Cap Identification





Camshaft Bearing Cap Tightening Sequence


- Tighten M6 fasteners on right camshaft bearing caps Nos. 2 - 6 in sequence shown to 12 Nm (105 in. lbs.).
- Tighten M6 fasteners on left camshaft bearing caps Nos. 2 - 5 in sequence shown to 12 Nm (105 in. lbs.).
- Tighten M8 fasteners on No. 1 camshaft bearing cap and left camshaft bearing cap No. 6 to 28 Nm (250 in. lbs.).

CAMSHAFT & CRANKSHAFT TIMING GEAR SPECIFICATIONS

Camshaft Sprocket Bolt 75 ft. lbs.
Crankshaft Dampner/Pulley Bolt 100 ft. lbs.

EXHAUST MANIFOLD SPECIFICATIONS





Tighten attaching nuts in the sequence shown in (Fig. 111) to 20 Nm (175 inch lbs.).

Attach exhaust pipe to exhaust manifold and tighten fasteners to 37 Nm (27 ft. lbs.).

INTAKE MANIFOLD SPECIFICATIONS





Lower Intake Manifold
Tighten intake manifold fasteners to 28 Nm (250 in. lbs.) in the sequence shown. Repeat procedure until all bolts are at specified torque.





Upper Intake Manifold
Tighten upper intake manifold fasteners to 28 Nm (250 in. lbs.) in sequence shown. Repeat this procedures until all fasteners are at specified torque.