Valve guide replacement

1. 1
   Remove the cylinder head. Refer to “engine top side disassembly” .
2. 2
   Remove the valves. Refer to “cylinder head disassembly and assembly” .
3. 3
   Using the valve guide remover, drive the valve guide out toward the intake or exhaust camshaft side.

Special tool (a): 09916–43211 (valve guide
installer & remover)

• discard the removed valve guide subassemblies.
• Only oversized valve guides are available as replacement parts. (Part no. 11115- 29G70)

4. Refinish the valve guide holes in the cylinder head using the reamer and handle.

when refinishing or removing the reamer from the valve guide hole, always turn it clockwise.

Special tool (b): 09916–33320 (valve guide reamer
(9.8 Mm)) (c): 09916–34542 (reamer handle)

5. Cool down the new valve guides in a freezer for about one hour and heat the cylinder head to 100 – 150 °c (212 – 302 °f) with a hot plate.

do not use a burner to heat the valve guide hole to prevent cylinder head distortion.

1. 1
   Apply engine oil to each valve guide and valve guide hole.
2. 2
   Drive the guide into the guide hole using the valve guide installer.

failure to oil the valve guide hole before driving the new guide into place may result in a damaged guide or head.

Special tool (a): 09916–43211 (valve guide
installer & remover) (d): 09916–53380 (valve guide
installer attachment)

Cylinder head 13.7 – 13.9 Mm (0.54 – 0.55 In) [in and ex]

8. After installing the valve guides, refinish their guiding bores using the reamer. Be sure to clean and oil the guides after reaming.

• be sure to cool down the cylinder head to ambient air temperature.
• Insert the reamer from the combustion chamber and always turn the reamer handle clockwise.

Special tool (c): 09916–34542 (reamer handle)
(e): 09916–33210 (valve guide reamer
(4.5 Mm))

1. 1
   Reassemble the cylinder head. Refer to “cylinder head disassembly and assembly” .
2. 2
   Install the cylinder head assembly. Refer to “engine top side assembly” .