Cylinder Head

Cylinder Head Bolts





^ 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") : 0.18 mm (0.0071 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 bolt wrench (commercial service tool).

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

a. Apply new engine oil to threads and seating surface of cylinder head bolts.
b. Tighten all cylinder head bolts.
98.1 Nm (10 kgf-cm, 72 ft. lbs.).
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 cylinder head bolts in reverse order of that indicated in the figure.

d. Tighten all cylinder head bolts to 44.1 Nm (4.5 kgf-cm, 33 ft. lbs.).
44 Nm (4.5 kgf-cm, 33 ft. lbs.)





e. Turn all cylinder head bolts 60 degrees clockwise. (Angle tightening)

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

^ Check tightening angle indicated on angle wrench indicator plate.
f. Turn all cylinder head bolts 60 degrees clockwise again. (Angle tightening)
^ Install in the reverse order of removal.