Cylinder Head Warp Inspection; Combustion Chamber Inspection; Cylinder Head Disassembly - Polaris Hawkeye Repair Manual

ENGINE

CYLINDER HEAD WARP INSPECTION

1. Lay a straight edge across the surface of the head at
several different points and measure warpage by
inserting a feeler gauge between the straight edge
and the cylinder head surface. If warpage exceeds the
service limit, replace the cylinder head.
Cylinder Head Warp Limit:
.002" (.05 mm)

COMBUSTION CHAMBER INSPECTION

Clean all accumulated carbon deposits from combustion
chamber and valve seat area with a soft wire brush.
Inspect the combustion chamber for cracks and/or
damage from foreign debris.

CYLINDER HEAD DISASSEMBLY

WARNING
Wear eye protection or a face shield during cylinder
head disassembly and reassembly. Cylinder head
service should be performed by a technician knowl-
edgeable in cylinder head reconditioning in a prop-
erly equipped shop.
NOTE: Keep all parts in order with respect to their
location in the cylinder head.
1. Using a valve spring compressor, compress the valve
springs and remove the split keeper. NOTE: To
prevent loss of tension, do not compress the valve
spring more than necessary.
2. Remove spring retainer and spring.
NOTE: The valve springs should be positioned with the
tightly wound coils (A) against the cylinder head.
3.20
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3. Push valve out, keeping it in order for reassembly in
the same guide.
4. Measure free length of the inner and outer springs
with a Vernier caliper, Ill.1. Check spring for
squareness as shown in Ill.2. Replace spring if
measurements are out of specification.
III.1
III.2
5. Remove valve seals. NOTE: Replace seals whenever
the cylinder head is disassembled. Hardened,
cracked or worn valve seals will cause excessive oil
consumption and carbon buildup.
A
Valve Spring
Free Length
Coil fatigue/
Squareness