Heat exchanger, removing: Removing

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Remove plenum chamber cover.
Disconnect and remove Battery A. →
- 27 BATTERY, STARTER, GENERATOR, CRUISE CONTROL
- 27 BATTERY, STARTER, GENERATOR, CRUISE CONTROL for ELECTRICAL EQUIPMENT, CABRIOLET

NOTE:

If necessary, obtain radio anti-theft code before disconnecting Battery A.
On vehicles with electrically adjustable seats, move seats to rearmost position before disconnecting Battery A.

Release pressure in coolant circuit by opening cap at coolant reservoir. →
- 19 - ENGINE - COOLING SYSTEM for 1.8 LITER 4-CYL. 5V TURBO ENGINE MECHANICAL, ENGINE CODE(S): AMB
- 19 - ENGINE - COOLING SYSTEM for 2.0 LITER 4-CYL. 4V TURBO ENGINE MECHANICAL, ENGINE CODE(S): BPG, BWT
- 19 ENGINE - COOLING SYSTEM for 3.0 LITER 6-CYL. 5V ENGINE MECHANICAL, ENGINE CODE(S): AVK, BGN
- 19 - ENGINE - COOLING SYSTEM for 3.2 V6 4V ENGINE MECHANICAL, ENGINE CODE(S): BKH
- 19 - ENGINE - COOLING SYSTEM for 4.2 LITER V8 4V ENGINE MECHANICAL, ENGINE CODE(S): BNS
- 19 - ENGINE - COOLING SYSTEM for 4.2 LITER V8 5V ENGINE MECHANICAL, ENGINE CODE(S): BHF

Fig 1: Identifying Coolant Hoses

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Mark positions of coolant hoses - A - and - B -.
Pinch off both coolant hoses to heater core of air conditioner (e.g. using Hose Clamps Up To 25mm Dia. 3094) and remove hoses.

NOTE:

Make sure coolant hoses are correctly connected:
Coolant hose - A - supply from cylinder head
Coolant hose - B - return to water pump
Bleeding coolant circuit →
- 19 - ENGINE - COOLING SYSTEM for 1.8 LITER 4-CYL. 5V TURBO ENGINE MECHANICAL, ENGINE CODE(S): AMB
- 19 - ENGINE - COOLING SYSTEM for 2.0 LITER 4-CYL. 4V TURBO ENGINE MECHANICAL, ENGINE CODE(S): BPG, BWT
- 19 ENGINE - COOLING SYSTEM for 3.0 LITER 6-CYL. 5V ENGINE MECHANICAL, ENGINE CODE(S): AVK, BGN
- 19 - ENGINE - COOLING SYSTEM for 3.2 V6 4V ENGINE MECHANICAL, ENGINE CODE(S): BKH
- 19 - ENGINE - COOLING SYSTEM for 4.2 LITER V8 4V ENGINE MECHANICAL, ENGINE CODE(S): BNS
- 19 - ENGINE - COOLING SYSTEM for 4.2 LITER V8 5V ENGINE MECHANICAL, ENGINE CODE(S): BHF

Fig 2: Identifying Connections & Grommet

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Place container beneath connection - A -.
Install section of tubing to connection - B - and use a compressed-air gun to carefully blow the coolant out of the heater core (into the container).
Remove grommet - C -.
Remove drivers storage compartment →
- 68 - INTERIOR EQUIPMENT
- 68 - INTERIOR EQUIPMENT for BODY INTERIOR - CABRIOLET
.

Remove accelerator pedal module. Refer to → 20 - FUEL SUPPLY SYSTEM

Fig 3: Removing Bolts And Cover From Coolant Lines

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts - A - and remove cover - B - from coolant lines.
Protect floor covering beneath connections to heater core with absorbent paper.

Fig 4: Identifying Clips, Coolant Lines & Heater Core

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen clips - A - and pull both coolant lines - B - and - C - out of heater core connections.
Pull heater core - D - out of air conditioner.