Cylinder Head Assembly - Polaris Ranger 500 2x4 2007 Service Manual

ENGINE
o
Bottom - 60 or 75
NOTE: When using an interference angle, the seat
contact point on the valve will be very narrow, and is
a normal condition. Look for an even and continuous
contact point on the black marked area, all the way
around the valve face.
14. Clean all filings from the area with hot soapy water, rinse,
and dry with compressed air.
15. Lubricate the valve guides with clean engine oil, and apply
oil or water based lapping compound to the face of the
valve. Lapping is not required with an interference angle.
16. Insert the valve into its respective guide and lap using a
lapping tool or a section of fuel line connected to the valve
stem.
17. Rotate the valve rapidly back and forth until the cut sounds
smooth. Lift the valve slightly off of the seat, rotate 1/4
turn, and repeat the lapping process. Do this four to five
times until the valve is fully seated, and repeat process for
the other valve(s).
18. Clean cylinder head, valves, and camshaft oil supply
passage (A) thoroughly.
3.28
Seat
Width
o
o o
Seat - 45 or 46
o
Top - 30
o
or 31
A
19. If oil passage blind plug was removed, apply Crankcase
Sealant (PN 2871557) or equivalent sealer to the threads
and install, torquing to 8 ft. lbs. (11 Nm).
CAUTION: Do not allow sealant to enter oil passage.
20. Spray electrical contact cleaner into oil passage and dry
using compressed air.

Cylinder Head Assembly

Wear eye protection during assembly.
NOTE: Assemble the valves one at a time to
maintain proper order
1. Install new valve seals on valve guides.
2. Apply engine oil to valve guides and seats.
3. Coat valve stem with molybdenum disulfide grease.
4. Install valve carefully with a rotating motion to avoid
damaging valve seal.
5. Dip valve spring and retainer in clean engine oil and install
spring with closely spaced coils toward the cylinder head.
CAUTION