Heater Unit
Heater Unit
Special tools, testers and auxiliary items required
• Drip Tray For VAS 6100 (VAS 6208)
• Hose Clamps Up To 40 mm (VAS 3093)
• Compressed air gun, commercially available
Removing
• To improve accessibility, additional components e.g. engine cover must be removed (depending on engine version).
- Remove instrument panel.
- Remove the bulkhead inside the plenum chamber.
- Remove the rear channels from the right and left footwells. Refer to => [ Rear Footwell Channel ] Rear Footwell Channel.
- Place the (VAS 6208) under the engine.
- Mark the coolant hoses - 1 -.
Contact with hot engine coolant can cause severe scalding.
Coolant temperature can be above 100 °C with a warm engine. The cooling system is under pressure.
If necessary, reduce pressure and temperature before repairs.
- Clamp off the coolant hoses - 1 - using the (VAS 3093) and remove the coolant hoses from the heat exchanger.
- Using a compressed air gun, carefully blow residual coolant out of heater core at heater core connection.
- Cover the carpet inside the passenger compartment with waterproof foil and water absorbing paper.
• On removal, note down bolt lengths and assignment for installation later.
1 Screw
• 4 Nm
2 Screws
• 4 Nm
• Quantity: 2
3 Cable Bracket
4 Heater Unit
• Removing
- Disconnect the connectors from the heater.
• All cable ties opened or cut during removal must be reinstalled at the same locations during installation.
- Remove the bolts, refer to => [ (Item 6) Screws ] from the bracket => [ (Item 5) Bracket ].
- Remove the supports, refer to => [ (Item 8) Right Support ] and => [ (Item 9) Left Support ].
- Remove the bolts, refer to => [ (Item 10) Screws ] and => [ (Item 12) Screws ] and the bracket => [ (Item 11) Bracket ].
- Remove the bolts, refer to => [ (Item 1) Screw ] and => [ (Item 2) Screws ] from the cable bracket => [ (Item 3) Cable Bracket ].
• To be able to reach the bolt => [ (Item 1) Screw ] , heater on driver side must be pulled out slightly from the bulkhead.
• When removing heat unit, make sure the two coolant pipes of the heater core do not get caught and bent or damaged on plenum chamber or noise insulation pan.
• Also pay attention to wiring harness, individual wiring connections may get damaged when pulling too forcefully on wiring harness.
- Remove the heater.
Installing
Install in reverse order of removal. When doing this, note the following:
• A second technician is necessary to install the heater.
- A second technician should guide both coolant pipes (from inside the engine compartment) into the heat exchanger as the heater is being installed, refer to.
- Fill with coolant.
5 Bracket
6 Screws
• 8 Nm
7 Subframe
8 Right Support
9 Left Support
10 Screws
• 8 Nm
• Quantity: 2
11 Bracket
12 Screws
• 8 Nm
• Quantity: 2
Seal between heater and engine compartment
• Note installation position of seal - A - during assembly.