Vanguard BIG BLOCK M540000, Repair Manual, Page: 90 / 168

Preliminary Instructions
Prior to starting any repair or maintenance operation.
Make sure you are familiar with ALL safety warnings and
procedures as outlined in SECTION 1 - SAFETY AND
GENERAL INFORMATION - Safety Information .
ALWAYS wear safety glasses and gloves while performing
any maintenance and repair operation.
CYLINDER HEAD
Disassembly
1. Pack shop towels into the combustion chamber and
place cylinder head on bench with the combustion
chamber side down.
2. Obtain valve spring compressor (see SECTION 3 -
TROUBLESHOOTING - Special Tools List ).
3. Starting with the exhaust valve, remove as follows:
4. Install fulcrum screw (
A , Figure 107) and tighten until
positive thread engagement is obtained.
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5. Place tool ( B ) over head of fulcrum screw engaging small
end of slot.
6. With prongs of tool on valve spring retainer ( C ), pivot tool
to compress valve spring ( D ).
7. Using a magnet for best results, remove the tapered
keepers ( E ) from the valve stem groove.
8. Release the valve spring compression.
9. Remove tool and fulcrum screw.
10. Remove the valve spring retainer and valve spring (
F ).
11. Remove valve ( D , Figure 108) from valve guide.
108
12. Remove and discard the valve stem seal ( E ).
13. Mark the bottom of the valve to identify it as the exhaust
valve. Bag the valve, valve spring retainer, valve spring,
and tapered keepers, so that all parts can be installed in
their original locations at time of assembly.
14. Repeat steps 4 - 13 to remove intake valve.
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