Cylinder Head

Cylinder Head





Install cylinder head, and tighten cylinder head bolts in numerical order as shown in figure as follows:
A: Bank 1
B: Bank 2
<---: Engine front
Use the cylinder head bolt wrench [commercial service tool: - (J24239-01)] and power tool.

CAUTION:
If cylinder head bolts are re-used, check their outer diameters before installation. Refer to EM-106, "Inspection". Inspection
Before installing cylinder head, inspect cylinder head distortion. Refer to EM-106, "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 the 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 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).





After installing cylinder head, measure distance between front end faces of cylinder block and cylinder head (bank 1 and bank 2).
Standard 14.1 - 14.9 mm (0.555 - 0.587 in)
If measured value is out of the standard, re-install cylinder head.

Cylinder Head Bolts Outer Diameter





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