Snowmobile Arctic Cat (2007 year). Manual - part 42

3-46

AO215

3. Connect the harness plug in connector to the air

temperature sensor on the air silencer.

AO214

4. Position the mounting bracket to the air silencer;

then secure with the 14 mm lock nut.

AO201

5. With a new clamp, install the breather hose to

the top of the air silencer.

6. Connect the outlet tube to the throttle body and

secure with the hose clamp.

AO213

Servicing Air Silencer 

(Turbo)

„ NOTE: Air silencer should be serviced every
3000 miles or 6 months.

REMOVING/INSPECTING/
CLEANING

1. Loosen the hose clamps on the air inlet hose and

disconnect the hose from the air silencer and

turbo inlet.

2. Remove the four 8 mm cap screws from the air

silencer cover and remove the air filter.

AO354

3. Inspect the air silencer and filter thoroughly for

foreign material and clean with compressed air.

! WARNING

When using compressed air to clean components,
always wear safety glasses.

3-47

3

INSTALLING

1. Place the air filter into position in the air

silencer.

AO355

2. Position the cover on the air silencer and secure

with the four 8 mm cap screws.

AO354

3. Connect the air inlet hose to the air silencer and

turbo inlet and secure with the two clamps.

Turbocharger/

Intercooler 

(Turbo)

! WARNING

The rotating components in a turbocharger turn at
speeds of 150,000 RPM. Any imbalance could cause
rapid disintegration resulting in bodily injury or
death. Always handle a turbocharger in accordance
with the manufacturer’s recommendations.

! CAUTION

Do not drop the turbocharger. If it is dropped, it must
be replaced.

! CAUTION

Do not touch rotating parts as damage to turbine or
compressor blades may occur.

! CAUTION

Do not carry the turbocharger by the hoses or by
the waste gate control rod. Damage could occur.

! CAUTION

Do not run a turbocharged engine with the intake
hose removed from the compressor inlet. Dirt,
foreign objects, or loose clothing can be ingested
causing turbocharger failure and engine damage.

! CAUTION

Do not spin the turbo with compressed air as
bearings will be damaged.

! CAUTION

Do not store the turbo vertically as oil will be lost
from the bearing cavity and bearing damage on
start-up could occur.

! CAUTION

Do not remove sealing tape or plastic from the
turbo until ready for installation. Damage could
occur.

! CAUTION

Do not allow dirt or foreign objects to fall into the
turbocharger. Damage could occur.

3-48

REMOVING

1. Loosen the hose clamps on the air inlet hose and

disconnect the hose from the air silencer and

turbo inlet.

2. Disconnect the five exhaust springs and remove

the exhaust pipe.

3. Loosen the intercooler hose clamps at the throt-

tle body and the turbo.

AO356

AO357

4. Loosen the hose clamps and remove the hose

from the air bypass valve and the pressure sen-

sor hose.

AO358

5. Remove the two flange nuts securing the inter-

cooler to the mounting brackets and remove the

intercooler.

AO359

AO360

6. Remove the four 6 mm cap screws securing the

heat shield to the turbo oulet and exhaust mani-

fold.

AO361

7. Loosen the 6 mm cap screw and remove the air

bypass valve.

AO362

3-49

3

8. Loosen the 6 mm cap screws securing the turbo

inlet to the turbo. Remove the turbo inlet and

account for the gasket.

AO363

9. Using a suitable clamping device, clamp off the

two coolant hoses; then loosen the hose clamps

and disconnect the coolant hoses from the turbo.

10. Remove the three 8 mm lock nuts and two 8 mm

cap screws from the turbo outlet; then remove

the turbo outlet from the turbo and account for

the gasket.

AO364

11. Remove the banjo bolt securing the top oil feed

pipe to the turbo and account for the two copper

washers.

AO365

12. Remove the two 8 mm lock nuts and two 10 mm

cap screws securing the turbo to the exhaust

manifold and account for the gasket.

AO366

INSTALLING

„ NOTE: It is advisable to remove the two cap
screws securing the water tank to the valve cover
for turbo installation purposes.

1. With the gasket in place, install the turbo onto

the exhaust manifold and secure with the two 8

mm lock nuts and the two 10 mm cap screws.

Tighten in a crisscross pattern to 3.6-4.2 kg-m

(26-30 ft-lb).

AO367

„ NOTE: If the water tank was removed, secure it
to the valve cover with the two cap screws. Tighten
to 1.1 kg-m (8 ft-lb).

2. With the turbo secured, connect the top oil feed

pipe with the banjo bolt and the two copper

washers. Tighten to 1.5 kg-m (11 ft-lb).