Piston Assembly; Servicing Valves/Valve Guides/Valve Seats; Installing Valves; Removing Piston Rings - Arctic Cat 2011 Prowler HDX Service Manual

Servicing Valves/Valve
Guides/Valve Seats
If valves, valve guides, or valve seats require servicing or
replacement, Arctic Cat recommends the components be
taken to a qualified machine shop for servicing.
CAUTION
If valves are discolored or pitted or if the seating
surface is worn, the valve must be replaced. Do not
attempt to grind the valves or severe engine damage
may occur.
Measuring Rocker Arm (Inside
Diameter)
1. Using a dial calipers, measure the inside diameter of
the rocker arm.
2. Acceptable inside diameter must not exceed specifi-
cation.
Measuring Rocker Arm Shaft
(Outside Diameter)
1. Using a micrometer, measure the outside diameter of
the rocker arm shaft.
2. Acceptable outside diameter must be at or above
specification.

Installing Valves

1. Apply grease to the inside surface of the valve seals;
then place a lower spring seat and valve guide seal
over each valve guide.
2. Insert each valve into its original location.
3. Install the valve springs with the painted end of the
spring facing away from the cylinder head.
NOTE: If the paint is not visible, install the ends
of the springs with the closest wound coils toward
the head.
4. Place a spring retainer over the valve springs; then
using the valve spring compressor, compress the
valve springs and install the valve cotters.

PISTON ASSEMBLY

NOTE: Whenever a piston or pin is out of toler-
ance, it must be replaced.

Removing Piston Rings

1. Starting with the top ring, slide one end of the ring
out of the ring-groove.
2. Remove each ring by working it toward the dome of
the piston while rotating it out of the groove.
CC144D
Cleaning/Inspecting Piston
1. Take an old piston ring and snap it into two pieces;
then grind the end of the old ring to a 45° angle and
to a sharp edge.
Manual
Table of Contents
ATV-1011A
3
CC132D
CC400D
3-15