5-36 ENGINE TOP END
Valve Guide Installation
Apply engine oil to the valve guide outer surface before
Heat the area around the valve guide hole to about 120 ~
150°C (248 ~ 302°F) in the engine oil.
Drive the valve guide in from the top of the head using the
valve guide arbor. The flange stops the guide from going
in too far.
Special Tool - Valve Guide Arbor, 7: 57001-163
Wait until the cylinder head cools down and then ream the
valve guide with the valve guide reamer [A] even if the old
guide is reused.
Turn the reamer in a clockwise direction until the reamer
turns freely in the guide. Never turn the reamer counter-
clockwise or it will be dulled.
Once the guides are reamed, they must be cleaned thor-
Special Tool - Valve Guide Reamer, 7: 57001-162
Valve Guide Wear (Wobble Method)
If a small bore gauge is not available, inspect the valve
guide wear by measuring the valve-to-guide clearance
with the wobble method as indicated below. The reading
is not actual valve-to-guide clearance because the mea-
suring point is above the guide.
Insert a new valve [A] into the guide [B] and set a dial
gauge against the stem perpendicular to it as close as
possible to the cylinder head mating surface.
Move the stem back and forth [C] to measure valve-to
-valve guide clearance.
Repeat the measurement in a direction at a right angle
(90°) to the first.
If the reading exceeds the service limit, replace the guide.
Valve-to-Guide Clearance (Wobble Method)
0.08 ~ 0.16 mm
(0.0031 ~ 0.00630 in.) (0.0118 in.)
0.05 ~ 0.13 mm
(0.0020 ~ 0.00512 in.) (0.0106 in.)