CYLINDER HEAD — Inspection (Cont'd)

EM-23prose procedure

Inspection (Cont'd)

Valve Seat Installation (Cont'd)

3
Heat cylinder head to 150 to 160°C (302 to 320°F).
SEM008A
4
Press fit valve seat until it seats on the bottom.
5
Cut or grind valve seat using suitable tool at the specified dimensions as shown in S.D.S.
6
After cutting, lap valve seat with abrasive compound.
7
Check valve seat contact condition.

VALVE DIMENSIONS

Check dimensions in each valve. For dimensions, refer to S.D.S. When valve head has been worn down to 0.5 mm (0.020 in) in margin thickness, replace valve.

IMPORTANT

Grinding allowance for valve stem tip is 0.2 mm (0.008 in) or less.

VALVE SPRING

Squareness

Valve Spring Squareness

1
Measure "S" dimension. Out-of-square: Less than 1.8 mm (0.071 in)
SEM288A
2
If it exceeds the limit, replace spring.

Pressure

Check valve spring pressure.

Valve Spring Pressure

Compression length mm (in)	Load N (kg, lb)
0 (0)	0 (0, 0)
8 (0.31)	Approx. 235 (24, 53)
16.5 (0.650)	Approx. 539 (55, 121)

0 (0)

Load N (kg, lb)0 (0, 0)

8 (0.31)

Load N (kg, lb)Approx. 235 (24, 53)

16.5 (0.650)

Load N (kg, lb)Approx. 539 (55, 121)

Continue to EM-24

Cross References

S.D.S.