Cylinder Head Assembly: Specifications

SERVICE DATA AND SPECIFICATIONS (SDS)

Cylinder Head


CYLINDER HEAD

Unit: mm (in)






VALVE DIMENSIONS

Unit: mm (in)











VALVE GUIDE

Unit: mm (in)






VALVE SEAT

Unit: mm (in)











VALVE SPRING









Cylinder Head






Tighten cylinder head bolts in numerical order as shown in the figure with the following procedure, and install cylinder head.

a.Apply new engine oil to threads and seating surface of mounting bolts.
b.Tighten all bolts.






c.Turn all bolts 60 degrees clockwise (angle tightening).
d.Completely loosen.






CAUTION: In this step, loosen bolts in the reverse order of that indicated in the figure.

e.Tighten all bolts.






f.Turn all bolts 75 degrees clockwise (angle tightening).
g.Turn all bolts 75 degrees clockwise again (angle tightening).

Re-usability

CAUTION: If cylinder head bolts are reused, check their outer diameters before installation.

Cylinder Head Bolts Outer Diameter






Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between "A" and "B" exceeds the limit, replace them with new one.






Limit ("B"-"A"): 0.23 mm (0.0091 in)

If reduction of outer diameter appears in a position other than "d2", use it as "d2" point.

Surface Variation



CYLINDER BLOCK












INTAKE MANIFOLD








EXHAUST MANIFOLD






Camshaft Bearing Cap Torque & Sequence








Tighten mounting bolts of camshaft brackets in the following steps, in numerical order as shown in the figure.

a.Tighten No. 9 to 11 in numerical order.






b.Tighten No. 1 to 8 in numerical order.






c.Tighten all bolts in numerical order.






d.Tighten all bolts in numerical order.






Intake Manifold Specifications

Exhaust Manifold Specifications

Camshaft Gear/Sprocket Specifications