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3.39

ENGINE / COOLING SYSTEM

9923523 - 2012 RANGER RZR 570 Service Manual

Camshaft Sprocket Inspection

NOTE: Camshaft sprocket removal is not necessary

unless the replacement of the sprockets is required.

Inspect cam sprocket teeth for wear

or damage. Replace

timing chain and sprockets as a set if worn or damaged.

IMPORTANT: Replace camshaft sprocket bolts if they

re loosened or removed.

Camshaft / Camshaft Bore Inspection

Inspect a ll main journals a nd cam lo bes as de scribed

below and compare to specifications. Replace camshafts

or cylinde r he ad if wo rn beyond s ervice 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 lob e from the base

cir

cle to highest point on the lobe using a micrometer.

Compare to specification.

NOTE: Replace camshafts if damaged or if any part

worn past the service limit.

3. Visually insp ect each camsha ft journal for sco ring,

ar or damage.

4. Measure the diameter of the camshaft journals using

micrometer. Compare to specification.

= T

Camshaft Sprocket Bolts:

15 ft. lbs. (20 Nm)

Inspect

Sprocket Teeth

Replace if

Worn or Damaged

= In. / mm.

Camshaft Lobe Height:

Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm)

Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm)

Polaris 2012 RANGER RZR 570 INTL User Manual

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