Cylinder Head Bolt Torque

Cylinder Head Bolt Torque Sequence





Cylinder Head Bolt Torque Chart

CYLINDER HEAD SURFACE VARIATION





Check cylinder head for flatness (Fig. 16).
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 inch) MAX is a combined total dimension of the stock removal limit from cylinder head and block top surface (Deck) together.

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