Cylinder Head
Service SpecificationsSurface Warpage:
Cylinder Head Gasket Surface 0.10 mm (0.0039 inch)
Exhaust Manifold Mount Surface 0.10 mm (0.0039 inch)
Intake Manifold Mount Surface 0.10 mm (0.0039 inch)
Valve Guide Bore:
Standard Guide 10.985-11.006 mm (0.4325-0.4333 inch)
Oversize Guide 11.035-11.056 mm (0.4344-0.4353 inch)
Lifter:
Bore Diameter 31.00-31.016 mm (1.2205-1.2211 inch)
Oil Clearance:
Standard Value 0.024-0.050 mm (0.0009-0.0020 inch)
Maximum Value 0.07 mm (0.0028 inch)
Valve Seat:
Seat Angle 45°
Upper Relief Angle 15°
Lower Relief Angle 60°
Seat Width:
Intake 1.0-1.4 mm (0.0390-0.0550 inch)
Exhaust 1.2-1.6 mm (0.0470-0.0630 inch)
Cylinder Head Bolt Diameter:
Standard 10.800-11.000 mm (0.4250-0.4330 inch)
Minimum 10.700 mm (0.4210 inch)
Tightening Specifications
INSTALL CYLINDER HEAD BOLTS
HINT: The cylinder head bolts are tightened in 3 progressive steps (steps c, e and f). If any of bolts break or deform, replace them.
a. Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
b. Install the 14 plate washers to each cylinder head bolt.
c. Using a 10 mm bi-hexagon wrench, uniformly tighten the cylinder head bolts, in several passes, in the sequence shown.
Torque: 35 Nm (350 kgf-cm, 26 ft. lbs.)
If any of the bolts do not meet the torque specification, replace the bolt.
d. Mark the front of the cylinder head bolt head with paint.
e. Retighten the cylinder head bolts 90° in the numerical order shown.
f. Retighten cylinder head bolts by an additional 90° shown.
g. Check that the painted mark is now turned to the rear.