Cylinder Head Assembly

INSPECTION

1. INSPECT CYLINDER HEAD SET BOLT

(a) Using a vernier caliper, measure the length of the cylinder head bolt from the seat to the end.

Standard length:

141.3 to 142.7 mm (5.56 to 5.62 in.)

Maximum length:

143.7 mm (5.66 in.)

(b) If the length is more than the maximum, replace the cylinder head bolt.

(c) Using a vernier caliper, measure the diameter of the elongated thread at the narrowest visible area.

Standard diameter:

10.73 to 10.97 mm (0.422 to 0.432 in.)

Minimum diameter:

10.40 mm (0.409 in.)

(d) If the diameter is less than the minimum, replace the cylinder head bolt.

HINT
If a visual check reveals no excessively thin areas, check the center of the bolt (refer to illustration) and find the area that has the smallest diameter.

CYLINDER HEAD SUB-ASSEMBLY

The cylinder head bolts are tightened in 3 progressive steps.

Step 1:

Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 8 cylinder head bolts with the plate washers in several steps and in the sequence shown in the illustration.

Torque 36 Nm (367 kgf-cm, 27 ft-lbf)

Step 2:

Mark the front side of each cylinder head bolt head with paint.

Tighten the cylinder head bolts another 90°.

Step 3:

Tighten the cylinder head bolts an additional 90°.

Check that the paint mark is now at a 180° angle to the front.

CYLINDER HEAD LH

The cylinder head bolts are tightened in 3 progressive steps.

Step 1:

Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 8 cylinder head bolts with the plate washers in several steps in the sequence shown in the illustration.

Torque 30 Nm (306 kgf-cm, 22 ft-lbf)

SURFACE VARIATION

CAMSHAFT BEARING CAP (for Bank 1)

Install the camshaft and No. 2 camshaft to the camshaft housing.

Temporarily tighten the 8 bearing cap bolts in the order shown in the illustration.

Torque 10 Nm (102 kgf-cm, 7 ft-lbf)

CAMSHAFT BEARING CAP (for Bank 2)

Install the No. 3 camshaft and No. 4 camshaft to the camshaft housing.

Temporarily tighten the 8 bolts in the order shown in the illustration.

Torque 10 Nm (102 kgf-cm, 7 ft-lbf)

CAMSHAFT HOUSING SUB-ASSEMBLY LH

Install the camshaft housing sub-assembly LH and tighten the 13 bolts in the order shown in the illustration.

Torque 28 Nm (286 kgf-cm, 21 ft-lbf)

Tighten the 8 bolts in the order shown in the illustration.

Torque 16 Nm (163 kgf-cm, 12 ft-lbf)

CAMSHAFT HOUSING SUB-ASSEMBLY RH

Install the camshaft housing sub-assembly RH and tighten the 12 bolts in the order shown in the illustration.

Torque 28 Nm (286 kgf-cm, 21 ft-lbf)

Tighten the 8 bolts in the order shown in the illustration.

Torque 16 Nm (163 kgf-cm, 12 ft-lbf)

INTAKE MANIFOLD TORQUE & SEQUENCE Specifications

EXHAUST MANIFOLD TORQUE & SEQUENCE Specifications

CAMSHAFT GEAR/SPROCKET TORQUE Specifications