Cylinder Head

Cylinder Head





Install the cylinder head. Follow the steps below to tighten the bolts in the numerical order shown.

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

Apply engine oil to threads and seating surface of the bolts.
Step a 98.1 Nm (10 kg-m, 72 ft-lb)
Step b Loosen in the reverse order of tightening.
Step c 44.1 Nm (4.5 kg-m, 33 ft-lb)





Measure the tightening angle using Tool.
Tool number: KV10112100 (BT-8653-A)

CAUTION: Measure the tightening angle using Tool. Do not measure visually.

Step d 60° clockwise
Step e 60° clockwise

Cylinder Head Bolts Diameter





Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace the bolt with a new one.
Limit (d1 - d2) 0.18 mm (0.0071 in)
If reduction of diameter appears in a position other than d2, use it as d2 point.

CYLINDER HEAD DISTORTION
Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface.

CAUTION: Do not allow any debris to enter the oil or coolant passages.





Measure the bottom surface of the cylinder head for distortion in six directions as shown, using suitable tools.
Standard 0.03 mm (0.0012 in)
Limit 0.1 mm (0.004 in)
If measurement exceeds the limit, replace the cylinder head.