Snowmobile Arctic Cat (2008 year). Manual - part 16

2-1

2

SECTION 2 — ENGINE

TABLE OF

CONTENTS

Engine - Panther 370 .............................................. 2-2
Engine - Bearcat 570 ............................................ 2-17
Engine - F 570/T570 ............................................. 2-39
Engine - Crossfire 500/600 - M-Series 600........... 2-64
Engine - Crossfire 800/1000 - 

M-Series 800/1000............................................. 2-94

Engine - F-Series 500/600 - T-Series 500 ........... 2-129
Engine - F-Series 800/1000 ................................ 2-157
Troubleshooting Engine (Carbureted Models) ..... 2-189
Troubleshooting Engine (EFI Models) ................. 2-192

2-2

Engine - Panther 370

This engine servicing sub-section has been organized

to show a progression for the complete servicing of the

Arctic Cat 370 cc (Panther 370) engine. For consis-

tency purposes, this sub-section shows a complete and

thorough progression; however, for efficiency it may

be preferable to remove the engine as a complete

assembly, to remove and disassemble only those com-

ponents which need to be addressed, and to service

only those components. Also, some components may

vary from model to model. The technician should use

discretion and sound judgment.

„NOTE: Critical torque specifications can be
found in Section 1 of this manual.

„NOTE: Some illustrations and photographs used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.

SPECIAL TOOLS

A number of special tools must be available to the

technician when performing service procedures in this

engine section.

„NOTE: Special tools are available from the Arctic
Cat Service Parts Department.

Table of Contents

Removing ................................................................ 2-2
Disassembling......................................................... 2-4
Cleaning and Inspecting ......................................... 2-7
Measuring Critical Components............................ 2-10
Assembling............................................................ 2-12
Installing ................................................................ 2-15

Removing Engine

„NOTE: If equipped with electric start, disconnect
the battery.

1. Turn the gas tank shut-off valve to the CLOSED

position.

2. Open the belt guard.

3. Remove the drive belt; then remove the plug from

the belly pan.

„NOTE: Before installing the clutch puller, apply
oil to the threads of the puller and a small amount
of grease to the tip of the puller.

4. Remove the bolt and lock washer securing the

drive clutch to the crankshaft; then using the Drive

Clutch Puller and an impact wrench or a breaker

bar and Drive Clutch Spanner Wrench, tighten the

puller. If the drive clutch will not release, sharply

strike the head of the puller with a hammer. Repeat

this procedure until the clutch releases.

CM006

CM007

5. Remove the clutch from the engine compartment.

6. Remove the cap screw and washer securing the

driven pulley; then slide the pulley off the driven

shaft. Account for and note the position of any

alignment washers.

Description

p/n

Ball Hone

0644-290

Crankshaft Bearing Remover

0144-302

Drive Clutch Puller

0644-207

Drive Clutch Spanner Wrench

0644-136

Driven Pulley Puller

0744-023

Flywheel Spanner Wrench

0144-007

Flywheel Puller

0744-040

Piston Pin Puller

0644-328

Surface Plate

0644-016

V Blocks

0644-022

2-3

2

„NOTE: If the driven pulley will not slide off the
driven shaft, use the Driven Pulley Puller for
removal.

SC013D

7. Loosen the torque bumper from the engine mount.

8. Remove the springs securing the expansion cham-

ber to the exhaust manifold and resonator; then

remove expansion chamber.

MS368

9. Remove the cap screws and lock washers securing

the recoil starter; then remove the starter. Leave it

in the engine compartment.

AB082

10. Disconnect the main wiring harness connector and

the CDI unit wiring harness.

11. Disconnect the impulse hose from the crankcase.

12. Disconnect the spark plug caps.

13. Loosen the carburetor flange clamp. Remove the

carburetor from the intake flange and carburetor

boot. Place the carburetor to the side in an upright

position.

„NOTE: If equipped with electric start, remove the
lock nut and washer securing the ground cable to
the starter motor and loosen the two Allen-head
cap screws securing the flex-drive to the starter
motor; then remove the cap screws securing the
starter motor to the chassis. Remove the starter
motor.

MS369A

MS370A

14. Disconnect the oil-injection cable from the oil-

injection pump. Account for the E-clip and

washer; then disconnect the oil supply hose from

the pump and plug the hose to prevent leakage.

AB081

15. Remove the cap screws securing the engine to the

chassis. Account for washers, cap screws, and lock

nuts.

2-4

370-ENG07A

16. Lift the engine out of the engine compartment.

17. Remove the cap screws, washers, and lock wash-

ers securing the engine mounting brackets to the

engine; then remove the brackets.

Disassembling Engine

1. Remove the four nuts and lock washers securing

the exhaust manifold; then remove the exhaust

manifold. Account for two gaskets.

2. Noting the location of the longer cap screws for

assembly purposes, remove the 14 cap screws,

lock washers, and washers securing the top and

exhaust-side cooling shrouds.

3. Lift the top cooling shroud off the engine and slide

the exhaust-side cooling shroud off the exhaust-

manifold studs. Account for two exhaust-manifold

shroud gaskets.

AB014

4. Disconnect the two oil-injection hoses from their

fittings on the intake manifold.

5. Remove the nuts securing the intake manifold;

then remove the manifold with flange from the

engine. Account for two insulators. Discard the

gaskets.

6. Remove the intake-manifold cooling shroud from

the engine. Discard the two gaskets.

7. Using Flywheel Spanner Wrench to secure the

crankshaft, remove the three cap screws and lock

washers securing the starter pulley to the flywheel.

Remove the starter pulley; then carefully pry the

fan belt drive pulley from its seated position on the

flywheel and remove.

MD2494

8. Temporarily install the starter pulley on the fly-

wheel with three cap screws. Using the flywheel

spanner wrench to secure the crankshaft, loosen

and remove the flywheel nut and washers.

MD2495

„NOTE: If an impact wrench is being used, use of
a flywheel spanner wrench will not be necessary.

9. Remove the cap screws securing the starter pulley

to the flywheel and remove the pulley.

10. Remove the flange nuts securing the fan case to

the crankcase; then remove the fan case.

„NOTE: For further servicing of the axial fan com-
ponents, see Section 3.