Cylinder Head Assembly: Specifications

CYLINDER HEAD BOLT RE-USABILITY





NOTE: 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.

CYLINDER HEAD SURFACE VARIATION

Figure 98:

Maximum Allowable Surface Variation 0.1 mm (0.004 inch)

CYLINDER HEAD BOLT TORQUE/SEQUENCE





1. Before installing the bolts, the threads should be coated with engine oil.

2. Tighten the cylinder head bolts in the sequence shown. Using the 4 step torque turn method, tighten according to the following values:
^ First All to 34 Nm (25 ft. lbs.)
^ Second All to 68 Nm (50 ft. lbs.)
^ Third All to 68 Nm (50 ft. lbs.)

CAUTION: Do not use a torque wrench for the following step.

^ Fourth Turn an additional 1/4 Turn.

INTAKE MANIFOLD BOLT TORQUE

Intake Manifold Bolts 200 in. lbs.
EGR Tube to Intake Manifold 79 in. lbs.
Resonator Bolt to Intake Manifold 44 in. lbs.

EXHAUST MANIFOLD BOLT TORQUE

Exhaust Manifold Mounting Bolts 200 in. lbs.
Exhaust Manifold Heat Shield Bolts 105 in. lbs.
Exhaust Manifold Flange Fasteners 250 in. lbs.
EGR Tube to Exhaust Manifold 97 in. lbs.

CAMSHAFT SPROCKET/GEAR TORQUE

Camshaft Sprocket/Gear Mounting Bolt 75 ft. lbs.

CAMSHAFT BEARING CAP TORQUE/SEQUENCE





M6 Camshaft Bearing Cap Bolt 105 in. lbs.
M8 Camshaft Bearing Cap Bolt 250 in. lbs.

NOTE: See Image for Tightening Sequence.