Valve Clearance Adjustment - Polaris ACE 900 2017 Service Manual

VALVE CLEARANCE ADJUSTMENT

IMPORTANT
Do not rotate the engine backwards. The timing chain
may jump teeth and lead to poor performance.
NOTICE
Always inspect valve clearance prior to camshaft
installation or final engine assembly.
1. Reference the camshaft
markings made during disassembly. If installing new
camshafts or if camshafts were not marked, you can
reference the part number stamped on the end of the
shafts.
q
Intake Camshaft
Exhaust Camshaft
2. Lubricate the camshaft bearing journal surfaces with
Polaris PS-4 engine oil prior to installation.
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
intake and exhaust
- PN 1204583
w
- PN 1204584
ENGINE / COOLING SYSTEM
3. Carefully install the camshafts into the cylinder head.
The PTO camshaft lobes
shown.
4. Carefully install the rear camshaft carriers onto the
camshafts. Carrier openings should face each other
when installed properly.
5. Install the four bolts that retain each rear camshaft
r t
carrier & and tighten the bolts evenly to
specification.
TORQUE
Camshaft Carrier Bolts:
89 in-lbs (10 Nm)
e
should face out as
3
3.89