COOLING SYSTEM, DRAINING AND FILLING
Special tools and workshop equipment required
- Adapter V.A.G 1274/8
- Drip Tray For Workshop Crane VAS 6208
- Hose Clamp Pliers V.A.G 1921
- Cooling System Charge Unit VAS 6096 with VAS 6096/1
- Refractometer T10007
Draining
Note. Drained coolant must be stored in a clean container for disposal or reuse.
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Remove center noise insulation fasteners -1 to 3-.
Scheme 64
Place VAS 6208 under engine.
Vehicles with drain plug
Turn drain plug -arrow- on radiator left, place assisting hose on supports if necessary.
Scheme 65
Vehicles without drain plug
Remove lower coolant hose -2- from radiator by removing retaining clamps.
Note. Ignore -1-.
All Vehicles
Drain coolant.
Also remove lower coolant hose to after-run coolant pump -V51- -arrow- and allow remaining coolant to drain.
Scheme 66
Filling
Note. The cooling system is filled all year round with a mixture of frost and corrosion protection additives and water. Frost and corrosion protection additives prevent freezing and corrosion damage and scaling. They also raise the boiling point. For this reason the system must be filled all year round with frost and corrosion protection additives. Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates. Protection against frost must be assured to about -25 °C / -77 °F (in arctic climatic countries to about -35 °C / -95 °F). The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. Coolant additive portion must be at least 40%. If increased freeze protection is needed because of the climate, the amount of G12+ can be increased, but only up to 60% to provide freeze protection to about -40 °C / -104 °F. Otherwise the freeze protection and cooling effectiveness will be reduced. Only use clean drinking water for mixing coolant. If radiator, heat exchanger, cylinder head or head seal or cylinder block were replaced, do not reuse used coolant. Dirty coolant must not be re-used. Use the T10007 to determine the level of freeze protection in the coolant system.
Vehicles with drain plug
Close the drain plug -arrow-.
Vehicles without drain plug
Connect lower coolant hose -2- to radiator.
Note. Ignore -1-.
All Vehicles
Connect coolant hose to after-run coolant pump -V51- -arrow-.
Note. Shown in illustration on vehicle with Direct Shift Gearbox transmission.
Fill VAS 6096/1 with at least 10 liters of pre-mixed coolant with correct mixture ratio
Scheme 67
- G12+ (40%) and water (60%) for freeze protection down to -25 °C / -77 °F
- G12+ (50%) and water (50%) for freeze protection down to -35 °C / -95 °F
- G12+ (60%) and water (40%) for freeze protection down to -40 °C / -104 °F
Install V.A.G 1274/8 on expansion tank.
Assemble VAS 6096 on V.A.G 1274/8.
Place air outlet hose -1- into a small container -2-. (A small amount of coolant is drawn off which should be reserved with the discharged air.)
Close both valves -A- and -B- by turning lever perpendicular to direction of flow.
Connect hose -3- to pressurized air.
- Pressure: 6 to 10 bar pressure.
Open valve -B-, turn lever in direction of flow to do this.
Scheme 68
A vacuum is created in the cooling system by the suction jet pump.
- Needle on the instrument display must travel into the green region.
Also briefly open valve -A-, turn lever in direction of flow to do this, so that hose of the VAS 6096/1 is filled with coolant.
Close valve -A- again.
Let valve -B- remain open another 2 minutes.
- A further vacuum is created in the cooling system by the suction jet pump.
- Needle on the instrument display must still remain in the green region.
Close valve -B-.
- Needle in the display instrument must remain in the green region, then the sufficient vacuum in the cooling system is obtained for the upcoming filling.
If needle stands below the green region, repeat procedure.
If the vacuum decreases, cooling system is leaking.
Disconnect pressurized air hose.
Open valve -A-.
The vacuum in the cooling system has the effect of extracting coolant from VAS 6096/1; cooling system is filled.
Check coolant level and add coolant up to max-marking.
Scheme 69
Start engine, allow it to run at approximately 1500 RPM for a max. of 2 minutes and fill coolant up to overflow hole of expansion tank.
Seal coolant reservoir.
Allow engine to run until fan turns on.
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Check coolant level, and top off, if necessary.
- When the engine is at normal operating temperature, the coolant level must be on the Max. mark, and when the engine is cold, between the Min. and Max. marks.
Switch engine off.
COOLING SYSTEM COMPONENTS
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Note. When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work. Arrows on coolant pipes and coolant hoses must line up across from each other.
Scheme 70
- Radiator Removal and installation, refer to «RADIATOR»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__radiator) Replace coolant after replacing
- Non-Return Valve
- After-Run Coolant Pump -V51- Removal and installation, refer to «AFTER-RUN COOLANT PUMP»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__after-run-coolant-pump)
- Oil Cooler Replace coolant after replacing
- Coolant Pump Removal and installation, refer to «COOLANT PUMP»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-pump)
- Cylinder Head/Cylinder Block Replace coolant after replacing
- Coolant Expansion Tank
- Coolant Reservoir Cap With check-valve Pressure relief valve, checking «COOLING SYSTEM, CHECKING FOR LEAKS»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__cooling-system-checking-for-leaks)
- Throttle Valve Control Module -J338
- Heater Core Replace coolant after replacing
- Coolant Thermostat Removal and installation, refer to «COOLANT THERMOSTAT»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-thermostat) Checking, refer to «THERMOSTAT, CHECKING»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__thermostat-checking)
- Non-Return Valve
- Transmission Oil Cooler Replace coolant after replacing
Scheme 71
- O-ring Replace
- Retaining Clip
- Thermostat Housing Removal and installation, refer to «COOLANT THERMOSTAT HOUSING»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-thermostat-housing)
- Bracket
- 10 Nm
- Coolant Thermostat Removal and installation, refer to «COOLANT THERMOSTAT»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-thermostat) Checking «THERMOSTAT, CHECKING»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__thermostat-checking)
- Connecting Piece
- Gasket Replace
- Engine Coolant Temperature (ECT) Sensor -G62- With engine coolant temperature (ECT) gauge sensor -G2- If necessary, release pressure in cooling system before removing
- Sealing Plugs If necessary, release pressure in cooling system before removing
Scheme 72
- Coolant Fan -V7- Removal and installation, refer to «COOLANT FAN AND COOLANT FAN 2»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-fan-and-coolant-fan-2) Note the wire routing «COOLANT FAN AND COOLANT FAN 2»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-fan-and-coolant-fan-2)
- 5 Nm
- Lower Coolant Hose To connection for coolant regulator
- Retaining Clip
- Coolant Fan Control (FC) Thermal Switch -F18- - 35 Nm
- O-ring Replace
- O-ring Replace if damaged
- Upper Coolant Hose To connection sleeve at cylinder head
- O-ring Replace if damaged
- Radiator Removal and installation, refer to «RADIATOR»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__radiator) After replacing replace entire amount of coolant
- Bracket for radiator
- 5 Nm
- Support
- 5 Nm
- Fan Rib
- 5 Nm
- Coolant Fan 2 -V177- Removal and installation, refer to «COOLANT FAN AND COOLANT FAN 2»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-fan-and-coolant-fan-2) Note the wire routing «COOLANT FAN AND COOLANT FAN 2»(/audi/a3/8p-2004-2008/remont/cooling-fan/#32l-cooling-system-engine-codes-bub-cbra__coolant-fan-and-coolant-fan-2)
FASTENER TIGHTENING SPECIFICATIONS
| Component | Bolt Size | Nm |
|---|---|---|
| Air Filter Housing to Body | 10 | |
| Belt Pulley to Coolant Pump | 20 | |
| Bracket for Radiator | 5 | |
| Condenser to Radiator | 5 | |
| Connecting pieces to coolant thermostat housing | 10 | |
| Coolant Fan to Fan Shroud | 5 | |
| Coolant Fan Control (FC) Thermal Switch | 35 | |
| Coolant Hose Bracket to Secondary Air Injection (AIR) Pump Bracket | 10 | |
| Coolant Pump to Cylinder Block | 8 | |
| Coolant Pump Bracket to Accessory Assembly Bracket | 10 | |
| Fan Rib | 5 | |
| Fan Shroud to Radiator | 5 | |
| Coolant Thermostat Housing to Engine | 10 | |
| Radiator to Bracket | 5 | |
| Thermostat Housing Bracket | 10 | |
| Wiring Harness Bracket to Engine | 10 |
THERMOSTAT, CHECKING
- Thermostat removed.
Heat thermostat in water bath.
| Opening begins | Opening ends | Opening lift |
|---|---|---|
| Approximately 80 °C / 176 °F | Approximately 105 °C / 221 °F (1) | Min. 7 mm |
| (1) Cannot be tested. | ||
| (1) | Cannot be tested. |
COOLING SYSTEM, CHECKING FOR LEAKS
Special tools and workshop equipment required
- Cooling System Tester V.A.G 1274 A
- Adapter V.A.G 1274/8
- Adapter V.A.G 1274/9
Procedure
- Engine at operating temperature.
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Position V.A.G 1274 A with V.A.G 1274/8 on expansion tank.
Scheme 73
Generate a positive pressure of approximately 1.0 bar using hand pump of cooling system tester.
If the pressure drops
Search for leaking areas and repair the malfunction.
Scheme 74
Position V.A.G 1274 A with V.A.G 1274/9 on cap.
Generate a positive pressure using hand pump of cooling system tester.
- The pressure release valve must open at 1.4 to 1.6 bar.
If check-valve does not open as indicated
Replace cap.
COOLANT PUMP
Special tools and workshop equipment required
- Engine Support Bridge 10-222 A
- Shackle 10-222 A/12
- Water Pump Wrench V.A.G 1590
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
- Locking Pin T10060 A
- Bolt M8x40
Removing
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Note. Before removing the ribbed belt, mark the turning direction on it with chalk or a felt tip pen. A reversed direction of rotation can cause damage to the belt under operating conditions.
Swing tensioning device in direction of -arrow- to relieve tension on the ribbed belt and then lock it in place using the T10060 A.
Remove ribbed belt.
Disconnect air guide hose -arrow- at throttle valve control module -J338-.
Scheme 75
Secure 10-222 A/12 to right rear engine lifting eyelet.
Scheme 76
Position 10-222 A onto bolted flange of fenders.
- Spindle is positioned back.
Engage spindle carabineer hooks at shackle.
Lightly tension spindle.
Remove subframe mounting bolts -arrows- at left of engine.
Scheme 77
Remove center noise insulation fasteners -1 to 3-.
Remove right noise insulation fasteners -1 to 3-.
Scheme 78
Place VAS 6208 under engine.
Vehicles with drain plug
Turn drain plug -arrow- on radiator left, place assisting hose on supports if necessary.
Vehicles without drain plug
Remove lower coolant hose -2- from radiator by removing retaining clamps.
All Vehicles
Disconnect electrical connector -1- at engine coolant temperature (ECT) sensor (on radiator) -G83-.
Also remove lower coolant hose to after-run coolant pump -V51- -arrow- and allow remaining coolant to drain.
Note. Shown in illustration on vehicle with Direct Shift Gearbox transmission.
Remove pendulum support by removing bolts -1 to 3-.
Scheme 79
Unclip electrical wiring bracket to oil level thermal sensor -G266- at subframe.
Lower engine at spindle approximately 60 mm.
Remove belt pulley while securing pulley with V.A.G 1590.
Scheme 80
Note. If engine is removed, belt pulley must not be removed. Coolant pump bolts are then accessible through belt pulley holes.
Remove bolts -1- on coolant pump -2-.
Scheme 81
Swing coolant pump forward.
Installing
Installation is in reverse order of removal, note the following
Note. Replace O-ring.
Clean or smooth O-ring sealing surface.
Coat new O-ring with coolant additive G12+.
Insert coolant pump -2-.
Tighten bolts -1 - of coolant pump.
Install belt pulley.
Install ribbed belt. Refer to RIBBED BELT .
Fill with coolant COOLING SYSTEM, DRAINING AND FILLING .
Adjust the engine mounts. Refer to SUBFRAME MOUNT, ADJUSTING .
Tightening Specifications
| Component | Nm |
|---|---|
| Coolant Pump to Cylinder Block | 8 |
| Belt Pulley to Coolant Pump | 20 |
COOLANT THERMOSTAT HOUSING
Special tools and workshop equipment required
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
Removing
Note. Drained coolant must be stored in a clean container for disposal or reuse.
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Remove center noise insulation fasteners -1 to 3-.
Place VAS 6208 under engine.
Vehicles with drain plug
Turn drain plug -arrow- on radiator left, place assisting hose on supports if necessary.
Vehicles without drain plug
Remove lower coolant hose -2- from radiator by removing retaining clamps.
All Vehicles
Disconnect electrical connector -1- at engine coolant temperature (ECT) sensor (on radiator) -G83-.
Also remove lower coolant hose to after-run coolant pump -V51- -arrow- and allow remaining coolant to drain.
Note. Shown in illustration on vehicle with Direct Shift Gearbox transmission.
| CAUTION | Observe safety precautions when disconnecting the battery. Refer to REMOVAL AND INSTALLATION . |
Remove tool formed insert under luggage compartment floor covering.
Remove cover -arrow- for battery compartment
Scheme 82
Remove formed insert from over the battery.
With ignition switched off, disconnect Battery Ground (GND) cable -arrow-.
Scheme 83
If equipped, remove vacuum hose -2- to air guide hose.
Scheme 84
Disconnect air guide hose -1- at throttle valve control module -J338-.
Disconnect mass air flow (MAF) sensor -G70- electrical connector -3-.
Remove upper section of air filter housing -arrows-.
Remove filter element.
Pull off air guide cover -1-, disengage clips sideways to do so.
Scheme 85
Unclip air duct -2-.
Remove lower section of air filter housing -arrows-.
Scheme 86
Remove vacuum line -arrow- at variable intake manifold actuator.
Scheme 87
Remove bolts -1- and -2- and remove vacuum actuator from intake manifold.
Disconnect electrical connector -arrow- at engine coolant temperature (ECT) sensor -G62-.
Scheme 88
Disconnect secondary air hose at position indicated by -arrow-.
Scheme 89
Free up air hose at bracket.
Disconnect coolant hoses at positions indicated by -arrows-.
Scheme 90
Remove the bolts -arrows-.
Scheme 91
Pull transmission oil cooler coolant pipe bracket toward left.
Swing Secondary Air Injection (AIR) system hose bracket forward.
Remove bolt -arrow- at wiring harness bracket.
Scheme 92
| CAUTION | Press coolant pipe in direction of coolant pump using pry bar when removing coolant thermostat housing so that is not pulled off. |
Remove coolant thermostat housing -2- while pressing coolant pipe -1- toward coolant pump with pry bar.
Scheme 93
Installing
Installation is in reverse order of removal, note the following
Note. Replace seals.
Fill with coolant COOLING SYSTEM, DRAINING AND FILLING .
Connect battery. Required procedures. Refer to REMOVAL AND INSTALLATION .
Tightening Specifications
| Component | Nm |
|---|---|
| Coolant Thermostat Housing to Engine | 10 |
| Wiring Harness Bracket to Engine | 10 |
| Air Filter Housing to Body | 10 |
COOLANT THERMOSTAT
Removing
Note. Drained coolant must be stored in a clean container for disposal or reuse.
Remove coolant thermostat housing. Refer to COOLANT THERMOSTAT HOUSING .
Remove bolts -arrows- and remove connecting pieces -1-.
Scheme 94
Remove O-ring -3- with coolant thermostat -2- from coolant thermostat housing -1-.
Scheme 95
Installing
Installation is in reverse order of removal, note the following
Note. Always replace gaskets and seals.
Clean O-ring sealing surfaces.
Insert coolant regulator.
- Installation position: Align breather valve -arrow- as shown in illustration.
Coat new O-ring -1- with coolant G12+.
Attach connecting pieces to coolant thermostat housing.
Install coolant thermostat housing. Refer to COOLANT THERMOSTAT HOUSING .
Tightening Specifications
| Component | Nm |
|---|---|
| Connecting Pieces to Coolant Thermostat Housing | 10 |
COOLANT PIPE
Special tools and workshop equipment required
- Locking Pin T10060 A
Removing
Note. Drained coolant must be stored in a clean container for disposal or reuse.
| CAUTION | Observe safety precautions when disconnecting the battery. Refer to REMOVAL AND INSTALLATION . |
Remove tool formed insert under luggage compartment floor covering.
Remove cover -arrow- for battery compartment
Remove formed insert from over the battery.
With ignition switched off, disconnect Battery Ground (GND) cable -arrow-.
Remove coolant thermostat housing. Refer to COOLANT THERMOSTAT HOUSING .
Remove oil dipstick.
Note. Identify direction of ribbed belt travel with chalk or felt-tip pen. A reversed direction of rotation can cause damage to the belt under operating conditions.
Swing tensioning device in direction of -arrow- to relieve tension on the ribbed belt and then lock it in place using the T10060 A.
Scheme 96
If equipped, remove vacuum hose -2- to air guide hose.
Disconnect air guide hose -1- at throttle valve control module -J338-.
Disconnect mass air flow (MAF) sensor -G70- electrical connector -3-.
Remove upper section of air filter housing -arrows-.
Remove filter element.
Pull off air guide cover -1-, disengage clips sideways to do so.
Unclip air duct -2-.
Remove lower section of air filter housing -arrows-.
Disconnect secondary air hose at position indicated by -arrow-.
Free up air hose to secondary air injection (AIR) pump.
Remove center noise insulation fasteners -1 to 3-.
Free up coolant hose at bottom on fan shroud.
Scheme 97
Disconnect electrical connector -3- at secondary air injection (AIR) pump motor -V101- and free up electrical wiring.
On vehicles with DSG transmission, remove coolant pipe bracket -2- to transmission oil cooler.
Remove bolts -1-.
Loosen bolt -4- and remove Secondary Air Injection (AIR) pump with bracket.
Disconnect electrical harness connector -1- for A/C clutch on A/C compressor and free up electrical wire.
Scheme 98
| WARNING | The air conditioning refrigerant circuit must not be opened. |
Remove bolts -arrow- for A/C compressor.
Securely tie the A/C compressor with connected coolant hoses at front on the longitudinal member.
Disengage for engine speed (RPM) sensor -G28- connector -arrow- from bracket on oil dipstick guide tube.
Scheme 99
Remove bolt -3- and remove oil dipstick guide tube -2-.
Scheme 100
Remove bolt -4- and remove vacuum reservoir -1- from intake manifold.
Lay vacuum reservoir aside with lines connected.
Disconnect electrical connector -3- at after-run coolant pump -V51- -2-.
Scheme 101
Remove pump downward from rubber bracket loops. Spray rubber loops with silicone-free lubricant if necessary.
Remove after-run coolant pump -V51- bracket.
Unclip the wire harness retainer on the right from the coolant pipe.
Remove the wire harness on the left from the retainer on the coolant pipe.
Remove coolant hose to oil cooler at coolant pipe.
Remove coolant pipe from cylinder block.
Installing
Installation is in the reverse order of removal, note the following
Note. Replace O-rings.
Clean and/or smooth O-ring sealing surface in cylinder block before installing.
Coat new O-ring -1- with G12+ and slide onto coolant pipe -2-.
Scheme 102
Slide coolant pipe into hole at cylinder block.
Install coolant thermostat housing. Refer to COOLANT THERMOSTAT HOUSING .
Install A/C compressor. Refer to Removal and Installation .
Install ribbed belt. Refer to RIBBED BELT .
Fill with coolant COOLING SYSTEM, DRAINING AND FILLING .
Tightening Specifications
| Component | Nm |
|---|---|
| Coolant Pump Bracket to Accessory Assembly Bracket | 10 |
AFTER-RUN COOLANT PUMP
Special tools and workshop equipment required
- Hose Clamps Up to 25 mm Dia. 3094
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
Removing
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Remove center noise insulation fasteners -1 to 3-.
Free up coolant hose at bottom on fan shroud.
On vehicles with DSG transmission, remove coolant pipe bracket -2- to transmission oil cooler.
Note. Ignore pos. -1-, pos. -3- and item -4-.
Disconnect electrical connector -3- at after-run coolant pump -V51- -2-.
Remove after-run coolant pump -V51- downward from rubber bracket loops. Spray rubber loops with silicone-free lubricant if necessary.
Place VAS 6208 under engine.
Clamp off coolant hoses -1- and -4- with 3094 and remove from after-run coolant pump -V51-.
Installing
Installation is in reverse order of removal, note the following
Fill with coolant COOLING SYSTEM, DRAINING AND FILLING .
Tightening Specifications
| Component | Nm |
|---|---|
| Coolant Hose Bracket to Secondary Air Injection (AIR) Pump Bracket | 10 |
RADIATOR
Special tools and workshop equipment required
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
Removing
Note. When assembled correctly, radiator and condenser can show slight impressions on fins. This is not damage. Radiators or condensers should not be replaced because of slight impressions like these.
| WARNING | Risk of scalding due to hot steam and hot coolant. When the engine is warm the cooling system is under pressure. Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening. |
Open cap of coolant expansion tank.
Remove center noise insulation fasteners -1 to 3-.
Disconnect electrical connector -1- at Engine Coolant Temperature (ECT) sensor (on radiator) -G83-.
Place VAS 6208 under engine.
Turn drain plug -arrow- on radiator left, place assisting hose on supports if necessary.
Remove lower coolant hose -2- from radiator by removing retaining clamps.
Also remove lower coolant hose to after-run coolant pump -V51- -arrow- and allow remaining coolant to drain.
Remove front bumper cover. Refer to Removal and Installation .
Disconnect secondary air hose at position indicated by -arrow-.
Free up air hose to Secondary Air Injection (AIR) pump.
Disconnect upper coolant hose -arrow- from radiator by removing retaining clip.
Scheme 103
Remove fan shroud upper bolts -upper arrow-.
Scheme 104
Free up coolant hose at bottom on fan shroud.
Disconnect electrical connector -3- at secondary air injection (AIR) pump motor -V101- and free up electrical wiring.
On vehicles with DSG transmission, remove coolant pipe bracket -2- to transmission oil cooler.
Remove bolts -1-.
Loosen bolt -4- and remove Secondary Air Injection (AIR) pump with bracket.
Disconnect electrical harness connectors -1- for coolant fans at bottom on fan shroud.
Remove mounting bolts for fan shroud at bottom -bottom arrows-.
Pull out fan shroud downward with both fans.
Remove left and right air ducts from radiator.
Scheme 105
| WARNING | The air conditioning refrigerant circuit must not be opened. |
Note. To prevent damage to condenser and also to the refrigerant lines/hoses, ensure that the pipes and hoses are not stretched, kinked or bent.
Remove condenser mounting bolts -2-.
Remove bolts -1- at radiator.
Swing radiator slightly toward rear.
Disengage radiator upward and remove downward.
Installing
Installation is in reverse order of removal, note the following
Install the front bumper cover. Refer to Removal and Installation .
Install Secondary Air Injection (AIR) pump. Refer to SECONDARY AIR INJECTION PUMP .
Fill with coolant COOLING SYSTEM, DRAINING AND FILLING .
Tightening Specifications
| Component | Nm |
|---|---|
| Radiator to Bracket | 5 |
| Condenser to Radiator | 5 |
| Fan Shroud to Radiator | 5 |
COOLANT FAN AND COOLANT FAN 2
Removing
Disconnect secondary air hose at position indicated by -arrow-.
Free up air hose to secondary air injection (AIR) pump.
Remove fan shroud upper bolts -upper arrow-.
Remove center noise insulation fasteners -1 to 3-.
Free up coolant hose at bottom on fan shroud.
Disconnect electrical connector -3- at secondary air injection (AIR) pump motor -V101- and free up electrical wiring.
On vehicles with DSG transmission, remove coolant pipe bracket -2- to transmission oil cooler.
Remove bolts -1-.
Loosen bolt -4- and remove secondary air injection (AIR) pump with bracket.
Disconnect electrical harness connectors -1- for coolant fans at bottom on fan shroud.
Remove mounting bolts for fan shroud at bottom -bottom arrows-.
Pull out fan shroud downward with both fans.
Separate the electrical connector -1-.
Scheme 106
Free up the cables.
Remove nuts -arrows- and remove fans.
Installing
Installation is in reverse order of removal, note the following
Check the correct position of the clamps -1- for the electrical wire leading to the radiator fans.
Scheme 107
- The clamps must be installed as shown in the illustration.
- The clamps must be installed on the ribs in the recesses provided.
| CAUTION | Not installing the clamps in the provided locations can damage the radiator. |
Tightening Specifications
| Component | Nm |
|---|---|
| Coolant Fan to Fan Shroud | 5 |
| Fan Shroud to Radiator | 5 |
Scheme 108
Special tools and workshop equipment required
- Cooling System Tester V.A.G 1274 A
- Adapter V.A.G 1274/8
- Adapter V.A.G 1274/9
Scheme 109
Special tools and workshop equipment required
- Adapter V.A.G 1274/8
- Drip Tray For Workshop Crane VAS 6208
- Hose Clamp Pliers V.A.G 1921
- Cooling System Charge Unit VAS 6096 with VAS 6096/1
- Refractometer T10007
Scheme 110
Special tools and workshop equipment required
- Engine Support Bridge 10-222 A
- Shackle 10-222 A/12
- Water Pump Wrench V.A.G 1590
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
- Locking Pin T10060 A
Scheme 111
Special tools and workshop equipment required
- Hose Clamps Up to 25 mm Dia. 3094
- Hose Clamp Pliers V.A.G 1921
- Drip Tray for Workshop Crane VAS 6208
See also:
• RIBBED BELT
• SUBFRAME MOUNT, ADJUSTING
• REMOVAL AND INSTALLATION
• Removal and Installation
• Removal and Installation
• SECONDARY AIR INJECTION PUMP
• RADIATOR
• AFTER-RUN COOLANT PUMP
• COOLANT PUMP
• COOLING SYSTEM, CHECKING FOR LEAKS
• COOLANT THERMOSTAT
• THERMOSTAT, CHECKING
• COOLANT THERMOSTAT HOUSING
• COOLANT FAN AND COOLANT FAN 2
• COOLING SYSTEM, DRAINING AND FILLING