Cylinder Head

Cylinder Head Bolts Outer Diameter





^ Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between "d1" and "d2" exceeds the limit, replace them with new one.
Limit ("d1" - "d2") : 0.11 mm (0.0043 inch)
^ If reduction of outer diameter appears in a position other than "d2", use it as "d2" point.





^ Install cylinder head follow the steps below to tighten cylinder head bolts in numerical order as shown in the figure with cylinder head bolts wrench (commercial service tool).

CAUTION: If cylinder head bolts re-used, check their outer diameters before installation.

a. Apply new engine oil to threads and seat surfaces of cylinder head bolts.
b. Tighten all cylinder head bolts.
98.1 Nm (10 kgf-cm, 72 ft. lbs.)
c. Completely loosen all cylinder head bolts.
0 Nm (0 kgf-cm, 0 ft. lbs.)

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

d. Tighten all cylinder head bolts.
39.2 Nm (4.0 kgf-cm, 29 ft. lbs.)





e. Turn all cylinder head bolts 90 degrees clockwise (angle tightening).

CAUTION: Check the tightening angle by using the angle wrench [SST]. Avoid judgment by visual inspection without SST.

^ Check tightening angle indicated on the angle wrench indicator plate.
f. Turn all cylinder head bolts 90 degrees clockwise again (angle tightening).





^ After installing cylinder head, measure distance between front end faces of cylinder block and cylinder head (left and right banks).
Standard : 14.1 - 14.9 mm (0.555 - 0.587 inch)
^ If measured value is out of the standard, re-install cylinder head.
^ Install in the reverse order of removal after this step.