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Polaris Sportsman 850 - Engine Disassembly; Inspection; Valve Cover Removal; Inspection; Rocker Carrier; Camshaft Removal

Polaris Sportsman 850
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3
3.47
ENGINE DISASSEMBLY / INSPECTION
VALVE COVER REMOVAL / INSPECTION
1. Remove the six rocker cover bolts
q
and isolators
w
.
2. Replace isolators and cover gasket
e
if oil leaks are
evident.
ROCKER CARRIER / CAMSHAFT REMOVAL
1. Using a 12 mm Allen socket, rotate the flywheel
clockwise (direction of engine rotation) until pin
q
is
facing UP. Rotate engine back 60° to the 10:00
position
w
to relieve valve spring pressure from
camshaft lobes.
IMPORTANT
DO NOT rotate the engine using the camshaft sprocket
retaining bolt.
2. Using an 8mm socket, remove cam chain tensioner
bolts
r
evenly and remove tensioner. Note “TOP”
marked on plate
t
for assembly.
3. Using a 12mm socket, remove the cam sprocket bolt
u
and lift the chain and sprocket off camshaft.
Secure cam chain with a wire to prevent it from
falling off the crankshaft gear (if cylinder head will not
be removed).
4. Using a 10mm socket, loosen all cam carrier bolts
evenly and lift carrier / rocker arm assembly from
cylinder head.
5. Lift camshaft from cylinder head.
ENGINE / COOLING SYSTEM

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