Arctic Cat VLX 70002017, Service Manual

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Cleaning/Inspecting Valve Cover

NOTE: If the valve cover cannot be trued, the cylin-
der head assembly must be replaced.
1. Wash the valve cover in parts-cleaning solvent.
2. Place the valve cover on the Surface Plate covered
with #400 grit wet-or-dry sandpaper. Using light
pressure, move the valve cover in a figure eight
motion. Inspect the sealing surface for any indication
of high spots. A high spot can be noted by a bright
metallic finish. Correct any high spots before assem-
bly by continuing to move the valve cover in a figure
eight motion until a uniform bright metallic finish is
attained.
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Removing Valves

NOTE: Index all valves, springs, and cotters to their
original position when removing. When installing, all
valve components should be installed in their original
position.
1. Using a valve spring compressor, compress the valve
springs and remove the valve cotters. Account for an
upper spring retainer.
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2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
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
NOTE: The valve seals must be replaced.
3. Remove the valve springs; then invert the cylinder
head and remove the valves.
Measuring Valve Guide (Bore)
1. Insert a snap gauge 1/2 way down into each valve
guide bore; then remove the gauge and measure it
with a micrometer.
2. Acceptable inside diameter range must be within
specifications.
3. If a valve guide is out of tolerance, it must be
replaced.
Servicing Valves/Valve Guides/Valve
Seats
If valves, valve guides, or valve seats require servicing or
replacement, take the components to a qualified machine
shop for servicing.
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.
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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.
CAUTION
Do not remove an excessive amount of the sealing sur-
face or damage to the camshaft will result. Always
check camshaft clearance when resurfacing the valve
cover.
CAUTION
Water or parts-cleaning solvent must be used in con-
junction with the wet-or-dry sandpaper or damage to
the sealing surface may result.
CAUTION
If valves are discolored or pitted or if the seating sur-
face is worn, the valve must be replaced. Do not attempt
to grind the valves or severe engine damage may occur.