Transmission Fluid Pre-Heater

Transmission Fluid Pre-Heater

Special tools, testers and auxiliary items required

• Hose Clamps Up to 40 mm Dia. (3093)

• Hose Clamps up to 25 mm dia. (3094)

• Hose Clip Pliers (VAS 6362)

Removing

- Remove the transfer case.

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






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






- Place the drip tray for VAS6100 (VAS 6208) under the engine/transmission.

- Clamp off the coolant hoses on the left side of the transmission using the hose clamps up to 25 mm dia. (3094).






- Then, remove the hose clamps from the coolant pipes - A - using for example, the hose clip pliers (V.A.G 1921). Disconnect the coolant hoses from the coolant pipes.

- Clamp off the coolant hoses on the right side of the transmission using the hose clamps up to 40 mm dia. (3093) and disconnect the coolant hoses from coolant pipes - A -.






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






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

- Remove the bolts - 1 and 2 - and remove the pipes from the transmission. Collect the leaking fluid.






- Seal the pipes with a suitable plug from the engine bung set (VAS 6122) (protect against the penetration of dirt).

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






- Disconnect the connector - 1 - from the change-over valve (N180) - 2 - and remove the pre-heater together with the coolant pipes from the transmission.






Installing

Installation is performed in the reverse order of removal while observing the following:

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

- Install the pre-heater and bolts - arrows - to the transmission, install the coolant pipes to the transmission and connect them to the coolant hoses.






- Remove the plug and insert the pipes in the transmission until seated.






- Install the bolts - 1 and 2 -. Refer to => [ Transmission Fluid Pipe Overview ] Transmission Fluid Pipe Overview.

Further installation is performed in the reverse sequence.

Check the transmission fluid level and fill, if necessary. Refer to => [ Transmission Fluid Level, Checking and Filling ] ATF Level, Checking and Filling.

- Add coolant.