NOTE:
THIS LIST IS FOR 4.3L GASOLINE EN-
GINES.
A.
VARIATION FROM VERTICAL: LESS THAN
1.6 mm (0.063 in.)
B.
FREE LENGTH: 51.3 mm (2.02 in.)
C.
SPRING COMPRESSED TO 338 TO 374 N (76
TO 84 lbf) AT 43.2 mm (1.70 in.) CLOSED
SPRING COMPRESSED TO 832 TO 903 N (187
TO 203 lbf) AT 32.3 mm (1.27 in.) OPEN
D.
INSTALLED HEIGHT INTAKE: 42.92 TO
43.43 mm (1.670 TO 1.700 in.) EXHAUST: 42.92
TO 43.43 mm (1.670 TO 1.700 in.)
NOTE:
THIS LIST IS FOR 4.3L LPG ENGINES.
A.
VARIATION FROM VERTICAL: LESS THAN
1.6 mm (0.063 in.)
B.
FREE LENGTH: 50 mm (2.0 in.)
C.
SPRING COMPRESSED TO 265 N (59.5 lbf) AT
43.2 mm (1.70 in.) CLOSED SPRING COM-
PRESSED TO 718 N (161.5 lbf) AT
32.3 mm (1.27 in.) OPEN
D.
INSTALLED HEIGHT INTAKE: 42.92 TO
43.43 mm (1.670 TO 1.700 in.) EXHAUST: 42.92
TO 43.43 mm (1.670 TO 1.700 in.)
Figure 18. Valve Spring Specifications
ASSEMBLE AND INSTALL
1.
Install each valve in correct port. Install oil seal
in lower groove. Install shim, damper, spring,
shield, and cap or rotator. Using a spring com-
pressor, compress assembly and install retain-
ers. Measure height of valve spring as shown in
Figure 18. Measure from top of shim to top of
retainer cap. Install shims to get correct height
shown in Figure 18. The installed height of
valve spring must not be less than minimum
height.
2.
Clean surface of cylinder head and top of cylin-
der block. Make sure threads in block are clean.
If threads are not clean, use a thread chaser to
clean threads.
3.
Install cylinder head gasket and cylinder head.
Make sure cylinder head is aligned with pins in
block.
4.
Use sealant Hyster P/N 1451215 on threads of
capscrews for cylinder head. Install capscrews
as follows:
a.
Tighten all capscrews to 30 N•m (22 lbf ft).
Use sequence shown in Figure 19.
b.
Tighten capscrews 11, 7, 3, 2, 6, 10 an addi-
tional 55 degrees. Tighten capscrews 12 and
13 an additional 65 degrees. Tighten cap-
screws 1, 4, 8, 5, 9 an additional 75 degrees.
A.
FAN END
Figure 19. Cylinder Head Tightening Sequence
0600 SRM 1251
Cylinder Head Repair
13
