3.22
ENGINE
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
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 marker, all the
way around the valve face.
8.
Clean all filings from the area with hot soapy water,
rinse, and dry with compressed air.
9.
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.
10. Insert the valve into its respective guide and lap using
a lapping tool or a section of fuel line connected to the
valve stem.
11. 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.
12. Clean rocker assembly, cylinder head, valves, and
camshaft oil supply passages thoroughly.
13. Spray electrical contact cleaner into oil passages and
dry using compressed air.
Cylinder Head 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.
Seat
Width
CAUTION
Wear eye protection during assembly.
Intake
Exhaust