Cylinder Head Assembly: Specifications

CYLINDER HEAD





Check that the nominal length of each cylinder head bolt meets the limit. If it exceeds the limit, replace the bolts with a new one.

Limit (A) 99.4 mm (3.91 inches)

Use special tool MB991654 to tighten the cylinder head bolts in the following procedures.





1) Tighten the bolts to 78 ± 2 Nm (58 ± 1 ft-lb) in the order shown.
2) Loosen the bolts fully in the reverse sequence to that shown.
3) Tighten the bolts to 20 ± 2 Nm (15 ± 1 ft-lb) in the order shown.





4) Apply a paint mark to the heads of the cylinder head bolts and cylinder head, then tighten 90 degree angle as shown.

Cylinder head flatness of gasket surface
Standard value 0.03 mm (0.001 in)
Limit 0.2 mm (0.007 in)
Cylinder head grinding limit of gasket surface (Total resurfacing depth of cylinder head and cylinder block)
Limit 0.2 mm (0.007 in)
Cylinder head overall height
Standard value 120 mm (4.7 in)
Cylinder head bolt shank length
Limit 99.4 mm (3.91 in)

Intake manifold bolt 24 ± 3 Nm (18 ± 1 ft-lb)
Intake manifold nut 20 ± 2 Nm (15 ± 1 ft-lb)

Camshaft Sprocket 89 ± 9 Nm (66 ± 6 ft-lb)

Exhaust manifold nut 49 ± 5 Nm (36 ± 3 ft-lb)