ENGINE 3-23
• Oil the stem hole of each valve guide and drive the guide into
the guide hole using the valve guide installer and attachment.
& 09916-44310: Valve guide remover/installer
09916-53360: Valve guide installer attachment
"
• After fitting the valve guides, refinish their guiding bores with
the valve guide reamer. Be sure to clean and oil the guides
after reaming.
& 09916-34570: Valve guide reamer (5.0 mm)
09916-34542: Reamer handle
VALVE SEAT WIDTH
• Coat the valve seat uniformly with prussian blue. Install the
valve and attach a valve lapper onto it. Tap the coated seat
with the valve face in a rotating manner, in order to obtain a
clear impression of the seating contact.
& 09916-10911: Valve lapper set
• The ring-like dye impression left on the valve face must be
continuous, without any breaks. In addition, the width of the
dye ring, which is the valve seat width, must be within the fol-
lowing specification.
% Valve seat width
W
Standard: 0.9 – 1.1 mm (0.035 ± 0.043 in)
If the valve seat is out of specification, re-cut the seat.
Failure to oil the valve guide hole before driving the
new guide into place may result in a damaged guide or
head.
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