3
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.111
CYLINDER HEAD INSTALLATION - SILVER
BOLTS
NOTICE
Head gasket and surfaces must be DRY and oil free.
Use care during assembly to keep oil and finger prints
off of gasket.
1. Verify the cylinder head bolts are SILVER. If
uncertain, measured bolts in the reduced diameter
portion of the Cylinder head bolt shank (between A
and B); verify the are the correct color and diameter
before proceeding.
MEASUREMENT
Diameter Between A - B:
q
Black: 9.00 +/- .1 mm
w
Silver: 8.20 +/- .1 mm
IMPORTANT
Torquing cylinder head bolts using the incorrect
procedure may lead to engine component damage.
2. 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.
NOTICE
Do not touch sealing surfaces of the new head gasket.
3. Guide cam chain
r
through a new head gasket
t
and install the gasket on the cylinder, locating it on
the alignment pins.
4. Carefully set the cylinder head
y
in place on
alignment pins.
5. Install and finger tighten the four NEW cylinder head
bolts
u
evenly.
6. Install and finger tighten the two NEW outer M6 bolts
i
evenly.
7. Torque the NEW cylinder head bolts in sequence to
specification.
TORQUE
Cylinder Head Bolts:
Apply light coat of engine oil to bolt threads
and under bolt head
Torque in Sequence for all steps
Step 1: 18 ft-lbs (25 Nm)
Step 2: 30 ft-lbs (40 Nm)
Step 3: Loosen all fasteners until they are
unseated
Step 4: 15 ft-lbs (20 Nm)
Step 5: 26 ft-lbs (35 Nm)
Step 6: Additional 180°
Step 7: Additional 180°
Torque The Outer M6 Head Bolts 89 ± 9 in-lbs
(10 ± 1 Nm)
ENGINE / COOLING SYSTEM
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