Honda WDP30X, Инструкция по эксплуатации

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8-6
Date of Issue: April 2008
WDP30X
• VALVE GUIDE REAMING
For best results, be sure the cylinder head is at room
temperature before reaming valve guides.
1. Coat the reamer and valve guide with cutting oil.
2. Rotate the reamer clockwise through the valve guide the full
length of the reamer.
3. Continue to rotate the reamer clockwise while removing it
from the valve guide.
4. Thoroughly clean the cylinder head to remove any cutting
residue.
5. Check the valve guide bore; it should be straight, round,
and centered in the valve guide. Insert the valve and check
operation. If the valve does not operate smoothly, the guide
may have been bent during installation. Replace the valve
guide if it is bent or damaged.
6. Check the valve guide-to-stem clearance ( P. 8-4 ).
e. VALVE SEAT RECONDITIONING
1. Thoroughly clean the combustion chamber and valve seats
to remove carbon deposits.
Apply a light coat of Prussian Blue or erasable felt-tipped
marker ink to the valve face.
2. Insert the valve, and snap it closed against its seat several
times. Be sure the valve does not rotate on the seat. The
transferred marking compound will show any area of the
seat that is not concentric.
Follow the instructions of the valve seat cutter
manufacturer.
3. Using a 45° cutter, remove enough material to produce a
smooth and concentric seat.
Turn the cutter clockwise, never counterclockwise.
Continue to turn the cutter as you lift it from the valve seat.
4. Use the 31° and 60° cutters to narrow and adjust the valve
seat so that it contacts the middle of the valve face. The 31°
cutter removes material from the top edge (contact too
high).
The 60° cutter removes material from the bottom edge
(contact too low). Be sure that the width of the finished
valve seat is within specification.
CONTACT TOO HIGH
CONTACT TOO LOW
VALVE GUIDE
REAMER, 5.5 mm
07984-200000D
60°
31°