Vanguard BIG BLOCK M540000, Repair Manual

Page: 97 / 168

2. Install exhaust valve assembly as follows:
A. Lightly lubricate inside diameter new valve stem
seal ( A , Figure 115) with clean engine oil. Place seal
squarely over valve guide. Obtain a suitable socket
or seal installation tool, and using a small hammer,
gently tap end of tool until seal lightly bottoms on
cylinder head.
115
B. Inspect valve stem groove for burrs that could
damage the valve stem seal during installation.
Remove any slight burrs with a fine-tooth file. Lightly
lubricate valve stem groove with clean engine oil.
C. Apply a suitable engine assembly lube to the valve
stem.
NOTE: If the valves were not tagged during disassembly,
remember that the exhaust valve ( B ) always has the smaller
valve face diameter.
D. From the bottom of the cylinder head, insert the
valve stem into the valve guide.
E. To distribute the assembly lube evenly around the
valve stem and guide, hand spin the valve as it is
installed. Work the valve back and forth in the bore
to verify that it slides smoothly and seats properly.
F. Using a suitable degreaser, thoroughly clean valve
face, valve guide, and end of valve stem of any
excess assembly lube.
G. Install valve spring ( C ) over the valve stem and
valve guide until seated on machined surface of the
cylinder head.
H. Set the valve spring retainer ( D ) on top of the valve
spring.
I. Install fulcrum screw ( A , Figure 116) and tighten until
positive thread engagement is obtained.
116
J. Obtain Valve Spring Compressor ( B ). See SECTION
3 - TROUBLESHOOTING - Special Tool List .
K. Place tool over head of fulcrum screw engaging
small end of slot.
L. With prongs of tool on valve spring retainer ( C ), pivot
tool to compress valve spring ( D ).
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