Cylinder Head Assembly: Specifications
Cylinder Head Gasket Surface Flatness0.05 mm (0.002 inch) per 51 mm (2 inch)
0.10 mm (0.004 inch) per total surface area
Cylinder head bolts
Discard the 20 inner cylinder head bolts.
First pass: Bolts 1-10 88 Nm (65 ft. lbs.)
Second pass: Bolts 1, 3, 5, 7 & 9 115 Nm (85 ft. lbs.)
Third pass: Bolts 1-10 tighten 90°
Fourth pass: Bolts 1-10 tighten 90°
Fifth pass: Bolts 1-10 tighten 90°
Sixth pass: Bolts 11-15 24 Nm (18 ft. lbs.)
Final pass: Bolts 11-15 31 Nm (23 ft. lbs.)
Intake manifold bolts
First pass: loosely install bolts 1-8
Second pass: tighten bolts 9-16 11 Nm (8 ft. lbs.)
Final pass: tighten all bolts 11 Nm (8 ft. lbs.)
Apply anti-seize lubricant to the bolt threads prior to installing the bolts.
Start installing the bolts with the second bolt from the rear on the top. The hole diameter is smaller, therefore allowing alignment of the remaining bolts.
When installing the exhaust manifolds, only use prevailing torque hex flange bolts with an interference fit.
Exhaust manifold bolts 38 Nm (28 ft. lbs.)