Camshaft Sprocket Inspection; 9929422 R02 - 2017-2019 Ace 900 Service Manual; Camshaft / Camshaft Bore Inspection - Polaris ACE 900 2017 Service Manual

ENGINE / COOLING SYSTEM
10. Evenly loosen the four bolts retaining each rear
a
camshaft carrier
the camshafts.
s
11. Mark the intake
ensure proper assembly.
12. Carefully remove camshafts from the cylinder head.

CAMSHAFT SPROCKET INSPECTION

Inspect cam sprocket teeth for wear or damage
Replace timing chain and sprockets if worn or damaged.
3.42
and carefully lift the carriers off
d
and exhaust camshafts to
CAMSHAFT / CAMSHAFT BORE
INSPECTION
Inspect all main journals and cam lobes as described
below and compare to specifications. Replace camshaft
(s) or cylinder head if worn beyond service limit or if any
surface is pitted or damaged.
1. Visually inspect each cam lobe for wear or damage.
2. Measure the height of each cam lobe from the base
circle to highest point on the lobe using a
micrometer. Compare to specification.
q
.
Replace camshafts if damaged or if any part is worn
Camshaft Lobe Height:
Intake: 1.5256 ± .0015" (38.75 ± .040 mm)
Service Limit: 1.5220" (38.66 mm)
Exhaust: 1.4961" ± .0015" (38.00 ± .040 mm)
Service Limit: 1.4925" (37.91 mm)
3. Visually inspect each camshaft journal for scoring,
wear or damage.

9929422 R02 - 2017-2019 ACE 900 Service Manual

NOTICE
past the service limit.
MEASUREMENT
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