Cylinder Head Bolt Torque

CYLINDER HEAD TORQUE/SEQUENCE






Left Side Cylinder Head






Right Side Cylinder Head


6. Tighten the bolts in sequence using the following steps and torque values:
- Step 1: Tighten bolts 1 - 10 to 27 Nm (20 ft. lbs.).
- Step 2: Repeat Step 1. Verify that bolts 1 - 10 reached 27 Nm (20 ft. lbs.).
- Step 3: Tighten bolts 11 - 14 to 14 Nm (10 ft. lbs.).
- Step 4: Turn bolts 1 - 10 90 °.
- Step 5: Turn bolts 1 - 10 an additional 90 °.
- Step 6: Tighten bolts 11 - 14 to 26 Nm (19 ft. lbs.)

CYLINDER HEAD BOLT RE-USABILITY







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 straight edge against the threads. If all the threads do not contact the scale, the bolt must be replaced.

CYLINDER HEAD SURFACE VARIATION







Check cylinder head for flatness.
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.