Snowmobile Arctic Cat (2007 year). Instruction - part 43

 

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Snowmobile Arctic Cat (2007 year). Instruction - part 43

 

 

3-50

AO368

3. With the gasket in place, secure the turbo outlet

to the turbo with the two 8 mm cap screws and

the three 8 mm lock nuts. Tighten the cap screws

and the lock nuts to 2.5 kg-m (18 ft-lb).

AO369

4. Connect the two coolant hoses to the turbo,

release the clamps, and secure the hoses with the

hose clamps.

5. Install the turbo inlet and the gasket onto the

turbo. Tighten the cap screws to 1.3 kg-m (9.5

ft-lb).

AO370

6. Install the air bypass valve and secure with the 6

mm cap screw. Tighten securely.

AO362

7. Install the heat shield onto the turbo outlet and

exhaust manifold with the four cap screws.

Tighten to 1.1 kg-m (8 ft-lb).

AO361

8. Position the intercooler onto the mounting

brackets; then connect the intercooler hoses to

the turbo, to the throttle body, to the air bypass

valve, and to the pressure sensor hose. Tighten

all hose clamps securely.

9. With the two flange nuts, secure the intercooler

to the mounting brackets. Tighten securely.

AO360

3-51

3

AO359

10. Install the exhaust pipe and secure with the five

exhaust springs.

11. Connect the air inlet hose to the turbo and to the

air silencer. Secure with the two clamps.

12. Start the engine and allow the engine to idle for

at least two minutes before increasing RPM to

allow for proper lubrication of the turbo shaft

and bearings.

13. After running the engine with the coolant tank

on and tight, open the bleed screw on the water

tank slightly to allow trapped air to escape. Con-

tinue until no air is apparent; then tighten the

bleed screw.

AO371

Servicing Oil Pump/

Pressure Relief Valve 

(660 cc)

OIL PUMP

„ NOTE: The engine must be removed for this pro-
cedure.

1. Remove the valve cover, oil pan, and timing

cover (see Section 2).  

0739-341

2.  With the timing cover removed from the engine,

place the timing cover on a flat surface; then

using a #2 Phillips-head socket and a hand

impact driver, remove the oil pump cover from

the timing cover. 

 

AO310

3. Using a straightedge with a feeler gauge, check

the mating surfaces of the covers. Checking the

mating surfaces will determine if the rotor-side

clearance is within the recommended specifica-

tions. The clearance specification is 0.07-0.12

mm (0.003-0.005 in.). 

AO311

4. Using a feeler gauge, measure the oil pump

rotor set radial clearance. The clearance specifi-

cation is 0.10-0.17 mm (0.004-0.007 in.).

KEY

1. Timing Chain 

Cover/Oil Pump 
Assy

2. Rotor Set

3. Screw

4. Valve Set

5. Circlip

6. Oil Gallery Filter

7. Bolt

8. Plug

9. Bolt

10. Bolt

11. Bolt

12. Dowel Pin

13. Oil Pressure 

Switch

3-52

AO312

5. Remove the oil pump components and inspect

for excessive wear and pitting. 

AO313

AO314

AO315

6. Measure the inner oil pump rotor outer bearing

race area. The outer race area specification is

42.920-42.950 mm (1.689-1.691 in.).

AO316

7. Measure the outer bearing race in the rotor tim-

ing cover surface. The outer bearing race speci-

fication is  42.980-43.010 mm (1.692-1.693 in.).

The clearance specification is 0.030-0.090 mm

(0.0012-0.0035 in.).

AO317

8.  Clean the cover surfaces and components with a

non-abrasive cleaner. Lubricate the rotor set

with engine oil; then install the rotor set into the

cover. 

9. Place the oil pump cover into position on the

timing cover; then install the Phillips-head

machine screws. Tighten the screws to 0.8-1.1

kg-m (6-8 ft-lb). 

AO310A

! CAUTION

Do not use an abrasive cleaner.

3-53

3

10. Install the timing cover, oil pan, and valve cover

(see Section 2).

PRESSURE RELIEF VALVE

„ NOTE: The engine must be removed for this pro-
cedure.

1. Remove the valve cover, oil pan, and timing

cover; then remove the relief valve cover (see

Section 2).

MD1555

2. Remove the circlip; then remove the spring

retainer, spring, and valve; then inspect compo-

nents for wear. 

MD1559

3. Install the valve, spring, and spring retainer.

Secure with the circlip. 

4. Clean the relief valve cover; then install the

cover using existing hardware. Tighten securely. 

5.  Install the timing cover, oil pan, and valve cover

(see Section 2).

 

 

 

 

 

 

 

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