3.64
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
15.Reinstall the camshafts and camshaft carriers and
tighten the bolts evenly to specification.
TORQUE
Camshaft Carrier Bolts:
7 ft-lbs (10 N·m)
16.Measure and confirm that valve clearance is now
within specification for each valve.
17.If valve clearance is not within specification, repeat
this procedure.
18.If all valve clearance measurements are now within
specification, remove the camshaft carrier and
proceed to “Camshaft Installation / Timing”.
VALVE LASH - TAPPET SELECTION MATRIX
A 440 tappet means the thickness of the tappet is 4.40 mm. Part Number: 5139458-XXX (X’s represent 3 digit tappet
size)
An Engine Valve Lash Adjustment calculator has been created and is located under Service and Warranty – News,
Forms and Links.
Click or go to https://www.polarisdealers.com/files/ServWarr/English/Engine%20Valve%20Adjustment%20Calculator.
pdf
The proper valve tappet may also be obtained by completing these steps:
IMPORTANT
The Valve Lash Specification and Measured Valve lash must be calculated in millimeters (mm)
1. Subtract the actual valve lash on the engine from the valve lash specification (i.e. 0.29 mm – 0.20 mm) = 0.09 mm.
2. Divide the 3 digit tappet number by 100 (i.e. 450 / 100) = 4.5 mm.
3. Add the results of step 1 and step 2 (i.e. 0.09 mm + 4.5 mm) = 4.59 mm.
4. Multiply that answer by 100 to obtain the correct new tappet (i.e. 4.59 mm x 100 = 459).
5. Refer to the table below to find the closest available tappet size to the result from step 4 (i.e. 459 should be
rounded to 460 since there is a 460 tappet).
AVAILABLE TAPPETS
322 325 328 330 332 335 338 340 342 345 348
350 352 355 358 360 362 365 368 370 372 375
378 380 382 385 390 392 395 398 400 402 405
408 410 412 415 418 420 422 425 428
ENGINE / COOLING SYSTEM
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