Cylinder Head Assembly: Specifications

HYDRAULIC TAPPETS






CYLINDER HEAD






CYLINDER HEAD VALVE SEAT






VALVES






VALVE SPRING






GENERAL TORQUE SPECIFICATIONS

Torque Specification (1 Of 3):

Torque Specification (2 Of 3):

Torque Specification (3 Of 3):

CYLINDER HEAD FLATNESS

Inspect all surfaces with a straightedge (2) if there is any reason to suspect leakage. If out-of-flatness exceeds 0.019 mm (0.00075 in.) times the span length in inches in any direction, either replace head or lightly machine the head surface. As an example, if a 12.0 inch span is 1.0 mm (0.004 in.) out-of-flat, allowable is 12 x 0.019 mm (0.00075 in.) equals 0.22 mm (0.009 in.). This amount of out-of-flat is acceptable. *Maximum of 0.2 mm (0.008 in.) for grinding is permitted.

CAUTION: This is a combined total dimension of stock removal from cylinder head surface.

CYLINDER HEAD TORQUE AND SEQUENCE






CAUTION: Cylinder head bolts are coated, DO NOT oil bolts.

Install cylinder head(s) over dowel pins. Install new cylinder head bolts 1-12. Tighten cylinder head bolts 1-12 in the sequence shown in using a three step tightening sequence:

a. First to 35 Nm (26 ft.lbs)

b. Second to 48 Nm (35 ft.lbs)

c. Third rotate an additional 90°



INTAKE MANIFOLD TORQUE AND SEQUENCE






Tighten bolts to 12 Nm (106 in.lbs) as shown.

EXHAUST MANIFOLD TORQUE






NOTE: Care must be taken to protect the cylinder head covers powder coating from scrapes and abrasions.

Install new gasket (1) and install exhaust manifold (4). Tighten attaching fasteners to 29 Nm (257 in.lbs).