Coolant Circuit (X 25 Xe, Y 26 Se)
| Engine | | X 25 XE | Y 26 SE |
| Radiator | | | |
| Design | | Cross-flow | Cross-flow |
| Coolant Filling Quantities | | | |
| Manual transmission | l | 7.7 | 7.7 |
| Automatic transmission | l | 7.6 | 7.6 |
| Coolant pump | | | |
| Design | | Centrifugal pump | Centrifugal pump |
| Delivery rate | l | 200 | 200 |
Coolant Circuit
| Engine | | X 25 XE | Y 26 SE |
| Fan | | | |
| Design | | Electric fan | Electric fan |
| Auxiliary air fan | | | |
| Design | | Electric fan | Electric fan |
| Thermoswitch | | | |
| Installation point | | on radiator | on radiator |
| Switch on | �C | 100 | 100 |
| Switch off | �C | 95 | 95 |
| Thermostat | | | |
| Design | | Bypass | Bypass |
| Start of opening | �C | 92 | 92 |
| Fully open | �C | 107 | 107 |
| Compensation tank cap | | | |
| Opening pressure | kPa (bar) | 140 to 150 (1.4 to 1.5) | 140 to 150 (1.4 to 1.5) |
| Boiling point | �C | 123 | 123 |