1.2.2 Exhaust Valves
DETROIT DIESEL 53
1. Support the cylinder head, bottom side up, on 3"
thick wood blocks.
2. Drive the valve guide out of the cylinder head with
valve guide remover: or J 7775 (four valve head) as
shown in Fig. 5.
Turn the cylinder head right side up and install the valve
guide as follows:
1. Insert the internally threaded end of the valve guide
in the valve guide installing tool (refer to the Valve
Guide Installing Tool chart). Be sure to use the correct
tool to avoid damage to the valve guide and to locate
the valve guide to the proper dimension.
2. Position the valve guide squarely in the bore in the
cylinder head and press the installing tool gently to start
Fig. 6. - Installing Valve Guide
the guide in place (Fig. 6). Then press the guide in until
the tool contacts the cylinder head (the bottom of the
CAUTION : Do not use the valve guides as
counterbore in the four valve cylinder head).
a means of turning the cylinder head over or
in handling the cylinder head.
Inspect Exhaust Valve Seat Insert
Inspect the exhaust valve seat inserts for excessive
The valve seat inserts are pressed into the cylinder
head and must be removed as outlined in the following
procedure to avoid damage to the cylinder head:
150" - 180"
Fig. 5. - Removing Valve Guide
*Machined for use with valve guide oil seal.
Valve Guide Installing Tools
1972 General Motors Corp.