3.17
ENGINE
3
9923983 - 2012-2013 RZR 170 Service Manual
© Copyright 2012 Polaris Sales Inc.
4.
Thoroughly clean the cam shaft.
5.
Measure height of each cam lobe using a micrometer.
Replace cam if worn below minimum height.
Replace camshaft if damaged or if any part is worn
excessively.
Cylinder Head Removal
NOTE: Cam chain and tensioner must be removed. If
no crankshaft service is being performed, secure
cam chain with mechanics wire to avoid chain falling
into the crankcase.
1.
Verify the valve cover and tensioner are removed.
2.
Remove the two 6mm cylinder/head base screws.
3.
Loosen each of the four cylinder head nuts evenly 1/
4 turn each time in a cross pattern until loose.
4.
Remove the nuts and tap the rocker assembly with a
plastic hammer until loose. Remove.
5.
After removing the camshaft and securing the cam
chain, tap the cylinder head lightly with a plastic
hammer until loose. CAUTION: Tap only in
reinforced areas or on thick parts of cylinder head
casting to avoid damaging casting.
6.
Remove cylinder head (A) and head gasket (B).
= In. / mm.
Cam Lobe Height:
Intake
Std: 1.1730” (29.795 mm)
Limit: 1.1574” (29.40 mm)
Exhaust
Std: 1.1637” (29.56 mm)
Limit: 1.1480” (29.16 mm)
Compression Release-One-way stop
A
B
