Service Manual

5-6 ENGINE TOP END
Cylinder Head
Cylinder Head Assembly Removal
•
Remove:
Air Cleaner and Carburetor (see Fuel System chapter)
Muffler (see Muffler Exhaust Pipe Removal)
Intake Manifold (see Fuel System chapter)
Spark Plug
•
Unscrew the rocker cover mounting bolts [A], and remove the cover
[B] and gasket.
•
When removing the #1, #2 cylinder head, set each cylinder at T.D.C
[A] of power stroke in.
•
Loosen the cylinder head bolts 1/4 turn in the sequence shown.
CAUTION
If the above procedure is not followed, the cylinder head may
be warped during removal.
•
Repeat the sequence until all bolts are removed and lift off the cylinder
head assembly.
NOTE

Mark the push-rods so they can be installed in their original position
during assembly.
Cylinder Head Assembly Installation
•
Clean the mating surfaces of the cylinder heads and cylinder.
•
Install the push rods in their original positions on each cylinder (see
Push Rod Installation).
•
Install the knock pins.
•
Set each cylinder at T.D.C [A] of power stroke in.
•
Put new gaskets and the cylinder head assemblies on each cylinder,
then align the push rods under the rocker arms.
NOTE

Because the head gaskets are coated with sealing agents, be
careful not to damage the surfaces.
•
Tighten the cylinder head bolts following the tightening sequence.
Torque - Cylinder Head Bolts: 25 N 1 m (2.6 kgf 1 m, 19 ft
1 lb)
CAUTION
A torque wrench must be used to assure proper torque.
Improper tightening of the head bolts can result in warping
of the cylinder head.
•
Check and adjust the valve clearance.
•
Install the gasket and rocker cover.
Torque - Rocker Cover Mounting Bolts: 5.9 N
1 m (0.60 kgf 1 m, 52 in
1 lb)
•
Install the other removed parts.