ATF Pre-Heater

ATF Pre-Heater

Special tools, testers and auxiliary items required

• Hose Clamps Up to 40 mm (3093)

• Hose Clamps Up to 25 mm Dia. (3094)

• Hose Clip Pliers (VAS 6362)

• Oil Collecting and Extracting Device (V.A.G 1782)

• Engine Bung Set (VAS 6122)

• Protective Goggles

Removing

- Remove the transfer case.

- If present, remove heat shield - 1 - for the coolant lines from the transmission. Remove the bolts - arrows A -.






- Remove the vacuum hose - 1 - from the vacuum pipe - 2 - (leading to the brake booster).






- Place the (V.A.G 1782) under the engine/transmission.

- Clamp off the coolant hoses on the left transmission side with (3094).






- Then remove the hose clips from coolant pipes - A -, for example using (V.A.G 1921). Remove the coolant hoses from the coolant pipes.

- Clamp off the coolant hoses on the right transmission side with (3093) and disconnect the coolant hoses from coolant pipes - A -.






- Remove the bleed hose - B - from the clip on the coolant pipe.






- Remove the coolant pipes - A - from the transmission - arrows -.

- Remove the bolts - 1 and 2 - and then remove the ATF pipes from the transmission. Collect the escaping oil.






- Seal the ATF lines with a suitable plug from the (VAS 6122) (to prevent dirt from getting into the lines).

- Remove the ATF pre-heater from the transmission - arrows -.






- Disconnect the connector - 1 - from the cooling oil valve (N471) - 2 - and remove the ATF pre-heater and coolant pipes from the transmission.






Installing

Install in reverse order of removal. Note the following:

• Tightening specifications, refer to => [ ATF Pipes, ATF Cooler and ATF Pre-Heater Overview ] Description and Operation

In the case of a dirty ATF or before installing a replacement transmission, clean the ATF cooler and the ATF lines. Refer to => [ ATF Pipes and Cooler, Cleaning ] ATF Pipes and Cooler, Cleaning.

- Bolt the ATF pre-heater - arrows - to the transmission, install the coolant pipes on the transmission and connect with the coolant hoses.






- Remove the plug and insert the ATF pipes all the way into the transmission.






- Install the ATF pipes. Refer to => [ ATF Pipes and ATF Cooler ] ATF Pipes and ATF Cooler.

Install in reverse order of removal.

Check the ATF level and fill if necessary. Refer to => [ ATF Level Inside Transmission ] ATF Level Inside Transmission.

- Fill with coolant.