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• Motor de combustión interna
• Máquinas rotativas

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26-1

Exhaust system components, removing and installing WARNING! Observe the following for all installations, especially in engine compartment due to lack of room: Route lines of all types (e.g. for fuel, hydraulic, EVAP canister system, coolant and refrigerant, brake fluid, vacuum) and electrical wiring so that the original path is followed. Watch for sufficient clearance to all moving or hot components. Notes: After exhaust system repairs, make sure exhaust system is not under stress and that it has sufficient clearance from the bodywork. If necessary, loosen double clamps and clamp and align exhaust pipe so that sufficient clearance is maintained to the bodywork and support rings carry uniform loads.

Always replace self-locking nuts.

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1 - 30 Nm Always replace Coat threads with G 052 112 A3 2 - Exhaust manifold with turbocharger Page 21-1 , Turbocharger with attachments, removing and installing 3 - Gasket Always replace 4 - Heated Oxygen Sensor (HO2S) -G39- before catalytic converter, 50 Nm Only use "G 052 112 A3" to grease thread; do not let "G 052 112 A3" get onto slit of oxygen sensor Use 3337 to remove and install Checking: Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, Engine Code(s): ATW, AUG, AWM, Repair Group 24; Checking Function; Oxygen sensor and oxygen sensor control before catalytic converter, checking 5 - Catalytic converter Checking

Page 26-8

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6 - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130Only use "G 052 112 A3" to grease thread; do not let "G 052 112 A3" get onto slit of oxygen sensor Use 3337 to remove and install Checking: Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, Engine Code(s): ATW, AUG, AWM, Repair Group 24; Checking Function; Oxygen sensor and oxygen sensor control behind catalytic converter, checking 7 - 25 Nm Always replace Coat threads with G 052 112 A3 8 - Marking 3x at perimeter Slide double clamp -item no. 21 - up to marking on tube 9 - Support ring With retainer ring 10 - Support ring

11 - 25 Nm

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12 - Rear muffler At factory, center and rear mufflers are installed as a single component. Replacement center and rear mufflers are supplied separately, with double clamp for connecting joint. Removing and installing: - Using VAG 1523 Chassis saw, cut at right angle through connecting pipe at separation point - 18 -. 13 - Dimension -a-

approx. 7 to 9 mm

Exhaust system must be cold Arrow shows direction of travel To adjust exhaust system, slide double clamp - 21 onto exhaust pipe up to marking - 8 - and tighten slightly Slide center and rear mufflers far enough forward that dimension -a- is obtained. Tighten double clamp.

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14 - Bolt head must face fuel tank 15 - Angle - - = 30 5 16 - Bolt end must not be below double clamp Double clamp viewed in direction of travel 17 - Angle - - = 10 + 5 18 - Separating point approx. 160 to 180 mm in front of rear muffler, marked by a recess in the pipe. 19 - Double clamp Tighten evenly to 40 Nm 20 - Center muffler 21 - Double clamp Tighten evenly to 40 Nm

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22 - Decoupling element max. flex 10 23 - Support ring Individual components

Fig.

24 - Front exhaust pipe 25 - 30 Nm Always replace Coat threads with G 052 112 A3 26 - Washer

1

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Fig. 1

Individual components of suspension

1 - Strap with buffer 2 - Exhaust pipe 3 - Washer 4 - Hex bolt, 25 Nm 5 - Self-locking nut, 25 Nm 6 - Spacer sleeve 7 - Compression spring 8 - Hex bolt

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Three Way Catalytic Converter (TWC), checking Special tools and equipment VAG 1551 Scan tool (or VAG 1552 Mobile scan tool) with VAG 1551/3 Cable VAG 1788/10 RPM adjuster Test sequence - Connect VAG 1551 Scan tool (or VAG 1552). Start engine and select the Engine Control Module (ECM) using address word 01. Connecting scan tool and selecting Engine Control Module (ECM): Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, Engine Code (s): ATW, AUG, AWM, Repair Group 01; General information for On Board Diagnostic (OBD); connecting Scan Tool (ST) Rapid data transfer

HELP

Indicated on display:

Select function XX

- Press buttons -0- and -4- to select "Basic Setting" function 04. Press -Q- button to confirm input. Basic setting Enter display group number XXX

Indicated on display:

- Use VAG 1788/10 RPM Adjuster to adjust engine RPM to between 2300 and 2500 RPM:

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- Press buttons -0-, -3- and -4- to select "Display group number 34". Press -Q- button to confirm input. Indicated on display: (1 to 4

System in basic setting 34 1

2

3

display fields)

4

- Maintain engine speed until indication in display field 4 jumps from "Test OFF" to "Test ON". The catalytic converter temperature in display field 2 must be at least 350 C. - Continue to maintain engine speed until display field 4 indicates specified value "B1-S1 OK". - Press -C- button. - Press buttons -0-, -4- and -6- to select "Display group number 46". Press -Qbutton to confirm input. Indicated on display: (1 to 4

Basic setting 46 1

2

3

display fields)

4

- Maintain engine speed until indication in display field 4 jumps from "Test OFF" to "Test ON". The catalytic converter temperature in display field 2 must be at least 430 engines AUG; and at least 550 C for engine AWM.

C for

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Engine code AUG - Check amplitude ratio in display field 3: Specification: max: 0.4 Engine code AWM - Check diagnostic value in display field 3: Specification: MIN: 1.0 Continuation for all - Continue to maintain engine speed until display field 4 indicates specified value "Cat-B1 OK". If display field 4 indicates "Cat B1 not OK": - Check DTC memory:

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel Injection & Ignition, Engine Code(s): ATW, AUG, AWM, Repair Group 01, DTC memory; Engine Control Module (ECM) DTC memory, checking

and erasing If specified value "Cat B1 OK" is obtained: - Press Rapid data transfer

HELP

-button.

Indicated on display:

Select function XX

- Press buttons -0- and -6- to select "End data transfer" function 06. Press -Qbutton to confirm input.