Cylinder Head Assembly

SERVICE DATA AND SPECIFICATIONS (SDS)

Cylinder Head

CYLINDER HEAD

Unit: mm (in)

VALVE DIMENSIONS

Unit: mm (in)

VALVE GUIDE

Unit: mm (in)

VALVE SEAT

Unit: mm (in)

VALVE SPRING

Unit: mm (in)

CYLINDER HEAD

Tighten cylinder head bolts in numerical order as shown in figure as follows:

Use the cylinder head bolt wrench (commercial service tool: J24239-01) and power tool.

Before installing cylinder head, inspect cylinder head distortion.

a.Apply new engine oil to threads and seat surfaces of cylinder head bolts.

b.Tighten all cylinder head bolts.

c.Completely loosen all cylinder head bolts.

CAUTION: In step "c", loosen bolts in the reverse order of that indicated in the figure.

d.Tighten all cylinder head bolts.

e.Turn all cylinder head bolts 95 degrees clockwise (angle tightening).

CAUTION: Check the tightening angle using the angle wrench [SST: KV-10112100 (BT-8653-A)] (A). Never make judgment by visual inspection.
Check tightening angle indicated on the angle wrench indicator plate.

Turn all cylinder head bolts 95 degrees clockwise again (angle tightening).

Re-usability

CAUTION: If cylinder head bolts are reused, check their outer diameters before installation.

Cylinder Head Bolts Outer Diameter

Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between (B) and (A) exceeds the limit, replace them with new one.

Limit [(B) - (A)]: 0.18 mm (0.0071 in)

If reduction of outer diameter appears in a position other than (A), use it as (A) point.

Surface Variation

EXHAUST MANIFOLD

INTAKE MANIFOLD

Camshaft Bearing Cap Torque & Sequence

Tighten mounting bolts in the following step, in numerical order as shown in the figure.

Tighten bolts in numerical order as shown.

Intake Manifold Specifications

Exhaust Manifold Specifications

Camshaft Gear/Sprocket Specifications