Valve Sealing Test - Polaris Sportsman 400 Service Manual

ENGINE
CYLINDER HEAD ASSEMBLY, CONT.
5. Dip valve spring and retainer in clean engine oil and
install spring with closely spaced coils toward the
cylinder head.
6. Place retainer on spring and install valve spring
compressor. Compress spring only enough to allow
split keeper installation to prevent loss of spring
tension. Install split keepers with the gap even on both
sides.
7. Repeat procedure for remaining valve.
8. When all valves are installed, tap lightly with soft faced
hammer on the end of the valves to seat the split
keepers.

VALVE SEALING TEST

1. Clean and dry the combustion chamber area.
2. Pour a small amount of clean, high flash point solvent
into the intake port and check for leakage around each
intake valve. The valve seats should hold fluid with no
seepage.
3. Repeat for exhaust valves by pouring fluid into exhaust
port.
3.36
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Closely spaced
coils toward
cylinder head