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9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
3.83
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”.
INTAKE VALVE LASH - TAPPET SELECTION MATRIX
A 440 tappet means the thickness of the tappet is 4.40 mm. Part Number: 5138477-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
440 450 460 470 480 490 500 510 520 530 540
442 452 462 472 482 492 502 512 522 532 542
445 455 465 475 485 495 505 515 525 535 545
448 458 468 478 488 498 508 518 528 538
EXHAUST VALVE LASH - TAPPET SELECTION MATRIX
Tappet Thickness Example: 322 equals thickness of 3.22 mm. Part Number: 5139458-XXX (X’s represent 3 digits on
tappet)
MEASUREMENT
Exhaust Valve Clearance (cold):
0.010 ± 0.002" (0.25 ± 0.05 mm)
Existing Valve Lash Tappet Marking (3 digits on tappet)
322 325 328 330 332 335 338 340 342 345 348 350 352 355 358 360 362 365 368 370 372 375 378 380 382 385 388 390 392 395 398 400 402 405 408
Correct Valve Lash Tappet Marking (3 digits on tappet)
Exhaust Valve Clearance Before Adjusting (mm)
0.000-0.024 302 305 308 310 312 315 318 320 322 325 328 330 332 335 338 340 342 345 348 350 352 355 358 360 362 365 368 370 372 375 378 380 382 385 388
0.025-0.049 305 308 310 312 315 318 320 322 325 328 330 332 335 338 340 342 345 348 350 352 355 358 360 362 365 368 370 372 375 378 380 382 385 388 390
0.050-0.074 308 310 312 315 318 320 322 325 328 330 332 335 338 340 342 345 348 350 352 355 358 360 362 365 368 370 372 375 378 380 382 385 388 390 392
0.075-0.099 310 312 315 318 320 322 325 328 330 332 335 338 340 342 345 348 350 352 355 358 360 362 365 368 370 372 375 378 380 382 385 388 390 392 395
ENGINE / COOLING SYSTEM
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