Polaris RZR PRO R 4 User Manual

3
9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual
© Copyright Polaris Industries Inc.
3.87
PISTON, CONNECTING ROD, AND
BEARING INSTALLATION
1. Install the connecting rod bearings. Use NEW
bearings.
a. Install the bearing inserts into the connecting rod
and the connecting rod cap.
b. Lubricate the connecting rod bearings with engine
oil.
2. Install the piston and the connecting rod to the correct
bore.
a. Stagger each piston ring end gap equally around
the piston.
b. Lubricate the piston and the piston rings with
engine oil.
c. Lubricate the piston ring compressor internal
surface with engine oil. Install piston ring
compressor PU-52876 over the piston. Do not
disturb the piston ring end gap location.
d. The piston must be installed so that the arrow on
the top of the piston faces the exhaust side of the
engine.
e. Place the piston in its matching bore.
f. Gently tap the piston into its bore with a hammer
handle. Guide the connecting rod to the
connecting rod journal while tapping the piston
into place.
g. Hold the piston ring compressor PU-52876
against the engine block until all the rings have
entered the cylinder bore.
IMPORTANT
Ensure that the connecting rod cap is properly oriented
on the connecting rod.
CAUTION
Use care not to damage the cooling jet during piston/
rod installation.
3. Blow the fractured surfaces of the connecting rod with
compressed air to ensure the fracture face is free of
debris.
IMPORTANT
Do not brush the fracture face to clean it.
4. Install the connecting rod cap.
IMPORTANT
Verify that the marking on the connecting rod and cap
are correct.
Make sure the connecting rod and rod cap fractures
mate properly.
5. Install the connecting rod bolts. Always use new
bolts. Torque the connecting rod bolt nuts to
specification.
TORQUE
Connecting Rod Fasteners:
a. Torque both fasteners to 106 in-lbs (12 N·m)
b. Torque both fasteners to 22 ft-lbs (30 N·m)
c. Angle torque an additional + 90° for both fasteners
6. Install the remaining connecting rods and piston
assemblies.
ENGINE / COOLING SYSTEM

Polaris RZR PRO R 4 Specifications

General

Brand	Polaris
Model	RZR PRO R 4
Category	Offroad Vehicle
Language	English