Cylinder Head

Cylinder Head





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).
A: Bank 1
B: Bank 2
<---: Engine front

CAUTION:
If cylinder head bolts re-used, check their outer diameters before installation. Refer to EM-111, "Inspection". Inspection
Before installing cylinder head, inspect cylinder head distortion. Refer to EM-111, "Inspection". Inspection

Apply new engine oil to threads and seat surfaces of cylinder head bolts.
Tighten all cylinder head bolts.
Torque 105 Nm (11 kg-m, 77 ft-lb)
Completely loosen all cylinder head bolts.
Torque 0 Nm (0 kg-m, 0 ft-lb)

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

Tighten all cylinder head bolts.
Torque 40.0 Nm (4.1 kg-m, 30 ft-lb)
Turn all cylinder head bolts 95° clockwise (angle tightening).

CAUTION:





Check the tightening angle by using the angle wrench [SST: KV10112100 (BT8653-A)] (A). Never make judgment by visual inspection.

Check tightening angle indicated on the angle wrench indicator plate.
Turn all cylinder head bolts 95° clockwise again (angle tightening).

Cylinder Head Bolts Outer Diameter





Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between (C) and (B) exceeds the limit, replace them with new one.
Limit [(C) - (B)] 0.18 mm (0.0071 in)
A Measuring point
e 48 mm (1.89 in)
d 11 mm (0.43 in)
If reduction of outer diameter appears in a position other than (B), use it as (B) point.