Download spec A-C

Replacement: After the old seat has been removed.
clean out any carbon or metal burrs from the seat
insert recess. Use a valve seat insert driver and a
hammer to install the insert.
Insert the pilot of the tool into the valve guide hole in
the cylinder block. Quickly drive the valve seat insert
in so that the insert goes evenly to the bottom of the
recess in the cylinder block. Make certain that the
valve seat insert rests solidly on the bottom of the
recess all the way around its circumference (Figure
9-10).
The valve seat must be stakedto ensure a tight fit and
eliminate the danger of its loosening in the bore.
CHECK THIS SURFACE
Insert valve seat staker in the cylinder block valve
guide hole. Rotatethestaking tool until it drops to the
original stake marks. Rotate staking tool another 60
degrees (1/6turn). Using a lead hammer, strike the
staking tool a sharp blow to wedge the new valve seat
securely in place. Before installing valves, it will be
necessary to refinish valve seat inserts.
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FIGURE 9-10. INSERTING NEW VALVE SEAT
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9-5