System Specifications

Cylinder Head

Head surface distortion
Standard 0.03 mm (0.0012 inch)
Limit 0.1 mm (0.004 inch)
Nominal cylinder head height 126.3 mm (4.97 inch)

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) 0.23 mm (0.0091 in)

If reduction of diameter appears in a position other than d2, use it as d2 point.

Bolt Tightening Sequence





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)
Step d 70° clockwise

Intake Manifold Bolts 8.3 Nm (0.85 kg-m, 73 in-lbs.)

Camshaft Bearing Cap Bolts





Step 1 (bolts 9 - 12) 2.0 Nm (0.2 kg-m, 17 in-lb)
Step 2 (bolts 1 - 8) 2.0 Nm (0.2 kg-m, 17 in-lb)
Step 3 (all bolts) 5.9 Nm (0.6 kg-m, 52 in-lb)
Step 4 (all bolts) 10.4 Nm (1.1 kg-m, 92 in-lb)

Camshaft Sprocket Bolts
Intake 103 Nm (11 kg-m, 76 ft-lbs.)
Exhaust 152 Nm (16 kg-m, 112 ft-lbs.)

Exhaust Manifold Nuts
Replace the nuts





First pass 33.9 Nm (3.5 kg-m, 25 ft-lbs.) in numerical order
Final pass Recheck torque of nuts both (A) and (B)