Cylinder Head

Cylinder Head





Install cylinder head follow the steps below to tighten cylinder head bolts in numerical order as shown in the figure.

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

Apply new engine oil to threads and seat surfaces of cylinder head bolts.
Tighten all bolts.
Torque 98.1 Nm (10 kg-m, 72 ft. lbs.)
Completely loosen.
Torque 0 Nm (0 kg-m, 0 ft. lbs.)

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

Tighten all bolts.
Torque 34.3 - 44.1 Nm (3.5 - 4.4 kg-m, 26 - 32 ft. lbs.)





Turn all bolts 90 to 95 degrees clockwise [target: 90 degrees (angle tightening)].

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

Check tightening angle indicated on angle wrench indicator plate.
Turn all bolts 90 to 95 degrees clockwise again [target: 90 degrees (angle tightening)].

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.