Cylinder Head Assembly: Specifications

Cylinder Head Bolts

Install new cylinder head bolts and washers in the following procedure.





Tighten cylinder head bolts in several steps to the specified torque according to the assembly order shown.

Tightening torque 35± 2Nm (26± 1 ft-lb)





Put a paint mark on all of cylinder head bolt heads and cylinder head.

CAUTION

When the tightening angle is smaller than the specified tightening angle, the appropriate tightening capacity cannot be secured.
When the tightening angle is larger than the specified tightening angle, remove the bolt to start from the beginning again according to the procedure.

Tighten according to the tightening order 90°

Tighten it further 90°

Make sure that the paint mark on the cylinder head bolt is in a straight line with that on the cylinder head.

Cylinder Head Inspection

CAUTION
The grinding limit shall be within 0.2 mm (0.008 inch) in combination with the cylinder block to be assembled.





For the flatness on the cylinder head bottom, measure distortion using a straight edge and thickness gauge. If the distortion exceeds the limit, grind and repair it.

Distortion on bottom

Limit Within 0.05 mm (0.002 inch)
Grinding limit 0.2 mm (0.008 inch)
Cylinder head height 128.5 mm (5.06 inches)

Camshaft Bearing Cap Mounting Bolt





Tighten in the order of number shown in the figure in two or three steps
Tightening Torque 12 ± 1 Nm (107 ± 1 in-lb)

Front Bearing Cap Mounting Bolt





Temporarily torque as shown (1) 17 ± 3 Nm (14 ± 2 ft-lb)
Tighten as shown (2) 30 ± 2 Nm (22 ± 1 ft-lb)

Intake Manifold Fasteners Tightening Specifications

Exhaust Manifold Fasteners Tightening Specifications

Camshaft Sprocket Bolts Specifications