System Specifications

The cylinder heads must not have depressions deeper than 0.0254 mm (0.001 inch) across a 38.1-mm (1.5-inch) square area, or scratches longer than 0.0254 mm (0.001 inch).








New cylinder head bolts must be installed. They are torque-to-yield designed and cannot be reused.

Cylinder head bolts
First pass Tighten to 50 Nm (37 ft. lbs.)
Second pass Loosen bolts one full turn
Third pass Tighten to 30 Nm (22 ft. lbs.)
Fourth pass Tighten 90°
Final pass Tighten 90°





Lower intake manifold
First pass 15 Nm (11 ft. lbs.)
Final pass 32 Nm (24 ft. lbs.)





Upper intake manifold 10 Nm (89 inch lbs.)








Exhaust manifold bolts
First pass 10 Nm (89 inch lbs.)
Final pass 22 Nm (16 ft. lbs.)