INSPECTION
When valves have been removed for inspection,
reconditioning or replacement, valve springs should
be tested (Fig. 50). As an example; the compression
length of the spring to be tested is 38.00 mm (1.496
in.). Turn table of Tool C-647 until surface is in line
with the 38.00 mm (1.496 inches.) mark on the
threaded stud and the zero mark on the front. Place
spring over stud on the table and lift compressing
lever to set tone device. Pull on torque wrench until
ping is heard. Take reading on torque wrench at this
instant. Multiply this reading by two. This will give
the spring load at test length. Fractional measure-
ments are indicated on the table for finer adjust-
ments. Refer to Engine Specifications to obtain
specified height and allowable tensions (Refer to 9 -
ENGINE - SPECIFICATIONS). Replace springs that
do not meet specifications.
INSTALLATION
INSTALLATION - CYLINDER HEAD OFF
(1) Install valves if removed.
(2) Install valve stem seal/spring seat assembly
over valve guides on all valve stems (Fig. 52). Ensure
that the garter spring is intact around the top of the
rubber seal.
(3) Place valve spring (color-coded end facing up)
and valve retainer into position.
(4) Compress valve spring with valve spring com-
pressor. Install locks and release tool. If valves
and/or seats are reground, measure the
installed height of springs (B) (Fig. 51), make
sure measurements are taken from top of
spring seat to the bottom surface of spring
retainer. If height is greater than 38.75 mm (1.5256
in.), install a 0.762 mm (0.030 in.) spacer in head
counterbore under the valve spring seat to bring
spring height back within specification.
Fig. 50 Testing Valve Spring
1 - SPECIAL TOOL C-647
Fig. 51 Checking Valve Tip Height and Valve Spring
Installed Height
1 - SPRING RETAINER
2 - GARTER SPRING
3 - VALVE SPRING SEAT TOP
4 - CYLINDER HEAD SURFACE
Fig. 52 Valve, Spring, and Valve Seal
1 - VALVE
2 - VALVE RETAINING LOCKS
3 - VALVE SPRING RETAINER
4 - VALVE SPRING
5 - VALVE SEAL AND VALVE SPRING SEAT ASSEMBLY
9 - 126 ENGINE 3.5L LH
VALVE SPRINGS (Continued)
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