Replacement and Assembly

REPLACEMENT





1. REPLACE VALVE GUIDE BUSHINGS
a. Gradually heat the cylinder head to 80 to 100°C (176 to 212°F).





b. Using SST and a hammer, tap out the guide bushing.
SST 09201-01055, 09950-70010 (09951-07100)





c. Using a caliper gauge, measure the bushing bore diameter of the cylinder head.





d. Select a new guide bushing (STD or O/S 0.05). If the bushing bore diameter of the cylinder head is greater than 10.306 mm (0.4057 inch), machine the bushing bore to the following dimension: 10.335 to 10.356 mm (0.4069 to 0.4077 inch)
If the bushing bore diameter of the cylinder head is greater than 10.356 mm (0.4077 inch), replace the cylinder head.





HINT: Different the bushings are used for the intake and exhaust.

e. Gradually heat the cylinder head to 80 to 100°C (176 to 212°F).





f. Using SST and a hammer, tap in a new guide bushing to the specified protrusion height.






Protrusion height:

SST 09201-01055, 09950-70010 (09951-07100)





g. Using a sharp 5.5 mm reamer, ream the guide bushing to obtain the standard specified clearance between the guide bushing and valve stem.





2. REPLACE SPARK PLUG TUBE GASKETS
a. Bend the 4 ventilation case claws installed on the cylinder head cover to an angle of 90° or more.
b. Using a screwdriver, pry out the gasket.

NOTICE: Be careful not to damage the cylinder head cover. Tape the screwdriver tip.





c. Using SST and a hammer, tap in a new gasket until its surface is flush with the upper edge of the cylinder head cover.
SST 09950-60010 (09951-00240, 09951-00440, 09952-06010), 09950-70010 (09951-07100)

NOTICE: Be careful of the installation direction.

d. Apply a light coat of MP grease to the gasket lip.
e. Return the 4 ventilation case claws to its original position.

REASSEMBLY

HINT:
- Thoroughly clean all parts to be assembled.
- Before installing the parts, apply fresh engine oil to all sliding and rotating surfaces.
- Replace all gaskets and oil seals with new ones.





1. INSTALL SPARK PLUG TUBES

HINT: When using a new cylinder head, spark plug tubes must be installed.

a. Apply adhesive to the end of the spark plug tube.
Adhesive: Part No.08833-00070, THREE BOND 1324 or equivalent





b. Using a wooden block and hammer, tap in a new spark tube until there is 40.9 - 42.1 mm (1.610 -1.658 inch) protruding from the camshaft bearing cap installation surface of the cylinder head.

NOTICE: Avoid tapping a new spark plug tube too far for measuring the amount of the protrusion while tapping.





2. INSTALL VALVES
a. Using SST, push in a new oil seal.
SST 09201-41020





b. Install the valve (1), spring seat (2), valve spring
(3) and spring retainer (4).





c. Using SST, compress the valve spring and place the 2 keepers around the valve stem.
SST 09202-70020 (09202-00010)





d. Using a plastic-faced hammer and the valve stem (not in use) tip wound with vinyl tape, lightly tap the valve stem tip to assure proper fit.

NOTICE: Be careful not to damage the valve stem tip.

3. INSTALL SHIMS AND VALVE LIFTERS
a. Install the shim and valve lifter.
b. Check that the valve lifter rotates smoothly by hand.