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9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
4. Apply clean engine oil to cylinder bore and bottom
tapered portion of cylinder sleeve.
5. Verify all ring end gaps are correctly located on
piston. Place cam chain and guides in alignment with
chain room.
6. Carefully compress rings with fingers or
commercially available spring compression tool and
install cylinder with a slight front to back rocking
motion until all rings are captive in cylinder and past
the taper of the sleeve.
7. Remove support block and ring compressor.
8. Push cylinder downward until fully seated on base
gasket.
9. Hold the cylinder in place and rotate the engine and
position the piston at TDC.
NOTE: If cam chain and flywheel are installed
(top end work only is being performed) hold cam
chain tight while rotating the engine to avoid
damage to the chain, drive sprocket teeth, or
tensioner blade.
Cylinder Head Installation
NOTE: Head gasket and surfaces must be DRY and
oil free. Use care during assembly to keep oil and
finger prints off of gasket.
1. Prepare cylinder head gasket sealing surfaces by
cleaning thoroughly to remove all residue. The new
head gasket must be installed clean and dry, free
from oil or grease.
NOTE: Do not touch sealing surfaces of the new
head gasket.
2. Guide cam chain (D) through a new head gasket (E)
and install the gasket on the cylinder, locating it on
the alignment pins.
3. Carefully set the cylinder head (F) in place on
alignment pins.
NOTE: Install new cylinder head bolts.
4. Install and finger tighten the (4) new cylinder head
bolts (G) evenly.
5. Install and finger tighten the (2) new outer M6 bolts
(H) evenly.
6. Torque the new cylinder head bolts in sequence to
specification.
Cylinder Head Torque Procedure:
Torque in sequence
Step 1: 21 ft-lbs (28 Nm)
Step 2: 26 ft-lb (35 Nm)
Step 3: Additional 135°
Step 4: M6 bolts: 8 ft-lb (10 Nm)
ENGINE
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