Figure 4-20. Valve Guide Installation.

TM 55-1930-208-24

(20) Refer to figure 4-20 and position the valve guide squarely into the bore.

(21) Use the installing tool to start the guide into the bore.

(22) Press on the installation tool until the tool contacts the cylinder head.

(23) Use the valve bridge installation tool and perform steps (20) through (22) for the valve bridge guide.

Figure 4-20. Valve Guide Installation.

(24) Refer to figure 4-21 and make sure the valve seat counterbore is clean.

(25) Immerse the cylinder head for at least thirty minutes in water heated to 180-200F (82-93 ).

(26) Place the cylinder head bottom side up.

(27) Place an insert in the counterbore valve seat side up.

(28) Drive the seat into the cylinder head with the valve seat installation tool until it seats solidly in the cylinder

head.

Figure 4-21. Valve Seat Insert, Installation.

4-27