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9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
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4. Measure the diameter of the camshaft journals using
a micrometer. Compare to specification.
NOTICE
Replace camshafts if damaged or if any part is worn
past the service limit.
MEASUREMENT
Camshaft Journal O.D.:
0.9035 - 0.9046" (22.949 - 22.978 mm)
Service Limit: 0.9025" (22.923 mm)
5. Temporarily install the camshaft carriers to measure
the camshaft bore. Torque bolts in sequence to
specification. Replace cylinder head if worn.
TORQUE
Camshaft Carrier Bolts:
89 in-lbs. (10 Nm)
NOTICE
Replace cylinder head if camshaft journal bores are
damaged or if worn past the service limit.
MEASUREMENT
Camshaft Carrier Bore I.D.:
0.9055" - 0.9063" (23.000 - 23.021 mm)
Service Limit: 0.9072" (23.044 mm)
6. Calculate oil clearance by subtracting camshaft
journal O. D. s from camshaft carrier bore I. D. s.
Compare to specification.
MEASUREMENT
Calculated Camshaft Oil Clearance:
0.0009" - 0.0028" (.022 - .072 mm)
Service Limit: .0039" (.10 mm)
ENGINE / COOLING SYSTEM
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