Cylinder Head Assembly: Specifications

Cylinder Head:

Cylinder Head

Camshaft Sprocket Bolt-Right Side 102 Nm +1/4 Turn (75 ft. lbs.) +1/4 Turn
Camshaft Sprocket Bolt-Left Side 102 Nm +1/4 Turn (75 ft. lbs.) +1/4 Turn

Exhaust Manifold to Cylinder Head-Bolts 23 Nm (200 in. lbs.)
Tighten bolts starting at the center working outward

Intake Manifold - Lower 28 Nm (250 in. lbs.)





Intake Manifold - Upper 12 Nm (105 in. lbs.)
Tighten bolts gradually starting in the center working outward





Cylinder Head Bolts
Step 1 61 Nm (45 ft. lbs.)
Step 2 88 Nm (65 ft. lbs.)
Step 3 88 Nm (65 ft. lbs.)
Step 4 + 90� Turn Do not use a torque wrench for this step.

Bolt torque after 90� turn should be over 122 Nm (90 ft. lbs.) in the tightening direction. If not, replace the bolt.

Cylinder Head Surface Variation
Cylinder head must be flat within:

Standard dimension = less than 0.05 mm (0.002 inch.)
Service Limit = 0.2 mm (0.008 inch.)
Grinding Limit = Maximum of 0.2 mm (0.008 inch.) is permitted.

CAUTION: 0.20 mm (0.008 in.) MAX is a combined total dimension of the stock removal limit from cylinder head and block top surface (Deck) together.





Cylinder Head Re-Usability

The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced.

Necking can be checked by holding a scale or straight edge against the threads. If all the threads do not contact the scale the bolt must be replaced.