TM-5-4310-389-14
h.
Check the clearance of the valve stems in the guides of both valves. If it exceeds the permissible maximum given
in the specifications, fit new guides.
i.
Removing and installing a valve guide.
1.
Uniformly heat the cylinder head in an oven to a temperature of 428F (220C). Do not heat for longer than
30 minutes. Drive out valve guide from the seating ring side (assembly arbor No. 003-0453, figure 5-74).
2.
Renew the valve guide. (Valve guides are also available in oversizes.) Fix new securing wire.
3.
With the cylinder head heated to 4280F (220'C), drive in from the rocker arm support side the longer end of
the valve guide until it seats on the securing wire.
4.
Allow the cylinder head to get cold. Then ream the valve guide (use reamer No. 003-0452).
5.
Remove, if necessary, by pulling the injector gasket remaining in the cylinder head (use puller No. 003-
0434).
6.
Check whether the valve rotators work freely; renew, if necessary (figure 5-75).
7.
Measure length of valve springs. Refer to specification data in table 4-4.
8.
Insert valves.
9.
Position the valve springs with the close coils facing the rotator. Install the valves (use valve spring
compressor No. 003-0504).
10.
Reinstall cylinder heads (paragraphs 4-15).
Figure 5-74. Driving Out Valve Guide
Figure 5-75. Installing Valve Rotators
5-46
