CSF DSG transmission oil cooler for VW Golf 7R, Audi S3 8V, Audi TT 8S

The cooling ineffectiveness of the DSG cooler becomes clear after examining the OEM cooling system design.

The factory coolant exits the engine block into a Y-piece where it splits into the engine water cooler and then the DSG cooler. This DSG cooler is surprisingly small and does not have the size or efficiency to exchange heat before exiting the cooler and leading to the DSG's oil/water heat exchanger.

When the engine coolant is hot and the DSG oil is hot, which is the case when cars are run at higher than stock or on the track, this hot coolant now has little to no cooling effect on the DSG oil and the DSG temperatures start to rise.

If the oil temperature is high, there is a risk that the DSG will be damaged. To avoid damage, the DSG starts to reduce torque, increase shift times and in extreme circumstances, gears can be lost. In the worst case, this can lead to costly damage to the transmission.

After extensive analysis and development, the CSF has developed a Quadruple Pass DSG cooler that offers increased cooling performance over the OEM cooler in a number of areas.

OEM cooler:

• 26mm 1-row core
• single pass design

CSF quadruple pass DSG cooler

• 2-row 42mm core with CSF B-Tube technology
• Quadruple pass design coolant passes through the radiator four times
• Removable stone guard
• Increase in flow area = 42%.
• Increase in heat dissipation = 36%.
• Fits both right side (DSG) and left side (auxiliary engine water).

The CSF Quadruple Pass DSG cooler uses a 2-row 42mm core that utilizes all available space. The B-Tube design maximizes tube efficiency in all areas, this tube design is stronger than 0-tubes, less material can be used for lighter and more efficient heat transfer, while the surface area inside the tube is increased by 15% over 0-tubes.

The quadruple pass design means that the coolant passes through the core four times before exiting, maximizing the time the cooler has to exchange heat for the coldest exit temperature.

This unique design results in a 42% increase in flow area and a 36% increase in heat dissipation. Helps keep DSG temperatures consistently cooler for longer. The cooler also comes complete with a removable stone guard for improved longevity against stone chips.

Fits on : 8V S3, 8S TT (2.0TSi), MK7 Golf R, 5F Leon Cupra