Standard automatic transmission cooling in Volkswagen Passat B6
The automatic transmission in the Volkswagen Passat B6 has its own internal cooling circuit, which operates independently of the engine cooling system.
Automatic transmission cooling system components:
* Automatic transmission heat exchanger: Located at the bottom of the radiator of the engine cooling system. It transfers heat from the automatic transmission to the engine coolant.
* Pipelines: Connect the heat exchanger to the automatic transmission.
* Automatic transmission oil pump: Pumps oil through the heat exchanger.
Working principle:
1. The automatic transmission oil pump pumps oil through the automatic transmission.
2. The oil heats up due to friction and sliding in the automatic transmission.
3. The heated oil enters the heat exchanger, where it transfers heat to the engine coolant.
4. The cooled oil returns to the automatic transmission.
Types of heat exchangers:
* External heat exchanger: Located outside the automatic transmission, usually under the engine. Used in powerful cars or in heavy traffic conditions.
* Internal heat exchanger: Located inside the automatic transmission and built into the housing. Used in most passenger cars.
Features of the automatic transmission cooling system in Passat B6:
* The Passat B6 uses an internal heat exchanger.
*On some models, an optional external oil cooler may be installed to improve cooling.
* The automatic transmission cooling system is closed, it is not connected to the engine cooling system.
* Automatic transmission oil must be changed regularly in accordance with the vehicle manufacturer’s recommendations.