Buick Encore: Engine Heating and Cooling - Repair instructions
Exhaust front pipe replacement (LUV)
Removal Procedure
WARNING: Refer to Exhaust Service Warning .
WARNING: Refer to Protective Goggles and Glove Warning .
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
- Disconnect the heated oxygen sensor - position 2 from the exhaust front
pipe.
Fig. 1: Catalytic Converter And Exhaust Front Pipe
- Remove the 2 fasteners (4) securing the warm up 3 way catalytic
converter (3) to the exhaust front pipe (5).
- Discard the exhaust front pipe gasket (2).
Fig. 2: Catalytic Converter
- Remove the 3 fasteners (2) securing the exhaust front pipe (3) to the
catalytic converter.
- Discard the exhaust front pipe gasket (1).
- Remove the exhaust front pipe (3).
- If you are replacing the exhaust front pipe, transfer the heated oxygen
sensor.
Installation Procedure
Fig. 3: Catalytic Converter
- Install the exhaust front pipe (3) to the catalytic converter with a NEW
gasket (1) and hand tighten the
fasteners (2).
Fig. 4: Catalytic Converter And Exhaust Front Pipe
CAUTION: Refer to Flex Decoupler Caution .
CAUTION: Refer to Fastener Caution .
- Install the exhaust front pipe (5) to the warm up 3 way
catalytic converter (3) with a NEW gasket (2) and
tighten the fasteners (4) to 17 (13 lb ft).
Fig. 5: Catalytic Converter
- Tighten the exhaust front pipe fasteners (2) to 22 (16 lb ft).
- Connect the heated oxygen sensor - position 2 to the engine wiring
harness.
- Start the engine and check for exhaust leaks.
EXHAUST FRONT PIPE REPLACEMENT
Removal Procedure
WARNING: Refer to Exhaust Service Warning .
WARNING: Refer to Protective Goggles and Glove Warning .
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
- Disconnect the heated oxygen sensor - position 2 harness connector.
Fig. 6: Muffler And Exhaust Pipe
NOTE: Do not twist or damage the flex coupling.
- Remove the 2 fasteners (3) securing the exhaust muffler (4) to the
exhaust front pipe (1).
- Discard the exhaust front pipe gasket (2).
Fig. 7: Front Pipe Gasket And Fasteners
- Remove the 3 fasteners (1) securing the exhaust front pipe (3) to the
catalytic converter.
- Discard the exhaust front pipe gasket (2).
- Remove the exhaust front pipe (3).
- If you are replacing the exhaust front pipe, transfer the heated oxygen
sensor.
Installation Procedure
Fig. 8: Pipe Gasket And Fasteners
- Install the exhaust front pipe (3) to the catalytic converter with a NEW
gasket (2) and hand tighten the
fasteners (1).
Fig. 9: Muffler And Exhaust Pipe
CAUTION: Refer to Fastener Caution .
NOTE: Do not twist or damage the flex coupler.
- Install the exhaust front pipe (1) to the exhaust muffler (4) with a NEW
gasket (2) and tighten the
fasteners (3) to 17 (13 lb ft).
Fig. 10: Pipe Gasket And Fasteners
- Tighten the exhaust front pipe fasteners (1) to 22 (16 lb ft).
- Connect the heated oxygen sensor - position 2 to the engine wiring
harness.
- Start the engine and check for exhaust leaks.
CATALYTIC CONVERTER REPLACEMENT (2H0)
Fig. 11: Locating Catalytic Converter Components (1.8L LUW)
Catalytic Converter Replacement (2H0)
Catalytic converter replacement (LUV)
Removal Procedure
WARNING: Refer to Exhaust Service Warning .
WARNING: Refer to Protective Goggles and Glove Warning .
- Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat
Shield Replacement
(LUV).
- Remove the catalytic converter heated oxygen sensor - 1. Refer to Heated
Oxygen Sensor Replacement
- Sensor 1 .
- Remove the catalytic converter to the turbocharger clamp fastener and
discard the clamp.
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Fig. 12: Exhaust Front Pipe Fasteners & Gasket
- Remove the exhaust front pipe fasteners (1) and discard the exhaust
gasket (2).
Fig. 13: Catalytic Converter Brace & Fasteners
- Remove the catalytic converter brace fasteners (1) from the catalytic
converter brace (2).
- Remove the catalytic converter.
Installation Procedure
Fig. 14: Catalytic Converter Brace & Fasteners
- Install the catalytic converter into the catalytic converter brace (2)
and loosely tighten the fasteners (1).
Fig. 15: Catalytic Converter V-Clamp
- Install a NEW clamp into the position shown and loosely tighten the
clamp fastener (1).
Fig. 16: Exhaust Front Pipe Fasteners & Gasket
CAUTION: Refer to Fastener Caution .
- Install the exhaust front pipe (3) to the catalytic converter with a NEW
gasket (2) and tighten the fasteners
(1) to 22 N.m (16 lb ft).
Fig. 17: Catalytic Converter Brace & Fasteners
- Tighten the catalytic converter brace fasteners (1) to 22 N.m (16 lb ft).
- Lower the vehicle.
- Tighten the turbocharge clamp fastener to 13 N.m (115 lb in).
- Install the exhaust manifold heat shield. Refer to Exhaust Manifold Heat
Shield Replacement (LUV).
- Install the catalytic converter heated oxygen sensor - 1. Refer to
Heated Oxygen Sensor Replacement -
Sensor 1 .
- Start the engine and check for exhaust leaks.
WARM UP THREE-WAY CATALYTIC CONVERTER REPLACEMENT (2H0, LUV)
Removal Procedure
WARNING: Refer to Exhaust Service Warning .
WARNING: Refer to Protective Goggles and Glove Warning
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Fig. 18: Exhaust Muffler And Warm Up 3 Way Catalytic Converter
- Loosen the exhaust clamp fastener (4) and remove the exhaust muffler
(2), from the warm up 3 way
catalytic converter (1), and the exhaust isolator (3).
- Support the exhaust muffler (2) with mechanics wire.
Fig. 19: Catalytic Converter And Exhaust Front Pipe
- Remove the 2 fasteners (4) securing the warm up 3 way catalytic
converter (3) to the exhaust front pipe
(5).
- Remove the warm up 3 way catalytic converter (3) from the exhaust
isolators (1) and remove the warm
up 3 way catalytic converter from the vehicle.
- Discard the exhaust front pipe gasket (2).
Installation Procedure
Fig. 20: Catalytic Converter And Exhaust Front Pipe
- Install a NEW exhaust gasket (2) onto the exhaust front pipe (5).
CAUTION: Refer to Fastener Caution .
- Install the warm up 3 way catalytic converter (3) into the exhaust
isolators (1) and the onto the exhaust
front pipe (5). Tighten the fasteners (4) to 17 (13 lb ft).
Fig. 21: Exhaust Muffler And Warm Up 3 Way Catalytic Converter
- Install the exhaust muffler (2) into the exhaust isolator (3) and the
warm up 3 way catalytic converter (1).
Tighten the exhaust clamp fastener (4) to 50 (37 lb ft).
- Lower the vehicle.
- Start the engine and check for exhaust leaks.
Exhaust muffler replacement (LUV)
Fig. 22: Exhaust Muffler
Exhaust Muffler Replacement (LUV)
EXHAUST MUFFLER REPLACEMENT (2HO)
Fig. 23: Exhaust Muffler (2HO)
Exhaust Muffler Replacement (2HO)
CATALYTIC CONVERTER HEAT SHIELD REPLACEMENT (2H0)
Removal Procedure
WARNING: Refer to Exhaust Service Warning .
WARNING: Refer to Protective Goggles and Glove Warning .
- Disconnect the battery negative cable. Refer to Battery Negative Cable
Disconnection and
Connection .
- Disconnect the heated oxygen sensor wiring harness plug.
- Remove the oil level indicator tube. Refer to Oil Level Indicator Tube
Replacement.
- Disconnect the air conditioning compressor hose from the air
conditioning compressor assembly. Refer to
Air Conditioning Compressor Hose Replacement (2H0) .
- Disconnect the air conditioning condenser hose from the compressor
assembly. Refer to Air
Conditioning Condenser Hose Replacement (2H0) .
Fig. 24: Wiring Harness Bracket
- Remove the wiring harness bracket fastener (2) and the wiring harness
bracket (1).
- Remove the 2 exhaust manifold heat shield fasteners (4).
- Remove the exhaust manifold heat shield (3).
Installation Procedure
Fig. 25: Wiring Harness Bracket
- Install the exhaust manifold heat shield (3).
CAUTION: Refer to Fastener Caution .
- Install the 2 exhaust manifold heat shield fasteners (4) and tighten to
8 N.m (71 lb in).
- Install the wiring harness bracket (1) and the wiring harness bracket
fastener (2) and tighten to 15 N.m
(11 lb ft).
- Install the oil level indicator tube. Refer to Oil Level Indicator Tube
Replacement.
- Connect the air conditioning compressor hose to the air conditioning
compressor assembly. Refer to Air
Conditioning Compressor Hose Replacement (2H0) .
- Connect the air conditioning condenser hose to the compressor
assembly. Refer to Air Conditioning
Condenser Hose Replacement (2H0) .
- Connect the heated oxygen sensor wiring harness plug.
- Connect the battery negative cable. Refer to Battery Negative
Cable Disconnection and Connection
CATALYTIC CONVERTER FRONT HEAT SHIELD REPLACEMENT
Fig. 26: Catalytic Converter Front Heat Shield
Catalytic Converter Front Heat Shield Replacement
EXHAUST CROSSOVER PIPE HEAT SHIELD REPLACEMENT
Fig. 27: Exhaust Crossover Pipe Heat Shield
Exhaust Crossover Pipe Heat Shield Replacement
EXHAUST MANIFOLD HEAT SHIELD REPLACEMENT (LUV)
Fig. 28: Exhaust Manifold Heat Shield (1.4L LUV)
Exhaust Manifold Heat Shield Replacement (LUV)
EXHAUST REAR MUFFLER HEAT SHIELD REPLACEMENT
Fig. 29: Exhaust Rear Muffler Heat Shield
Exhaust Rear Muffler Heat Shield Replacement
READ NEXT:
EXHAUST SYSTEM DESCRIPTION
NOTE: Use of non-OEM parts may cause driveability concerns.
The exhaust system carries exhaust gases, treated by the catalytic converter,
through a resonator, if applicable
FIRING ORDER & CYLINDER IDENTIFICATION
NOTE: This information is intended as a quick reference for firing
order and cylinder
identification only. The information provided covers many vehicles and
SEE MORE:
The brake master cylinder
reservoir
is filled with GM approved DOT 4
brake fluid as indicated on the
reservoir cap. See Engine
Compartment Overview for
the location of the reservoir.
Checking Brake Fluid
With the vehicle in P (Park) on a
level surface, the brake fluid level
should be between the mi
Tire and wheel removal and installation
Special Tools
CH-41013 Rotor Resurfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the wheel cover