Combustion Chamber; Valve Seat Reconditioning - Polaris Sportsman 800 EFI 4x4 2012 Service Manual

ENGINE
6. Measure valve guide (C) inside diameter at the top
middle and end of the guide using a small hole
gauge and a micrometer. Measure in two directions.
Valve Guide I.D.:
0.23672" + 0.000295"
(6.0617 + 0.0075 mm)
7. Subtract valve stem measurement from the valve
guide measurement to obtain stem to guide
clearance. NOTE: The valve guides cannot be
replaced. Be sure to measure each guide and valve
combination individually.
3.30

Combustion Chamber

1. Clean
combustion chamber and valve seat area with
carbon cleaner and a soft plastic scraper.
NOTE: Do not use a wire brush, metal scraper,
or abrasive cleaners to clean the bottom of the
cylinder head. Extensive damage to the cylinder
head may result. Wear safety glasses during
cleaning.

Valve Seat Reconditioning

NOTE: Polaris recommends that the work be done
by a local machine shop that specializes in this area.
The cylinder head valve guides cannot be replaced.
Wear eye protection or a face shield during cylinder
Valve Seat Inspection
Inspect valve seat in cylinder head for pitting, burnt
spots, roughness, and uneven surface. If any of the
above conditions exist, the valve seat must be
reconditioned. If the valve seat is cracked the cylinder
head must be replaced.
Follow the manufacturers instructions provided with the
valve seat cutters in the Cylinder Head Reconditioning
Kit (available commercially). Abrasive stone seat
reconditioning equipment can also be used. Keep all
valves in order with their respective seat.
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
all accumulated carbon
WARNING
head disassembly and reassembly.
deposits from