Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Warning | Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. | |
Topical note | Notes on coolant | ||
Notes on coolant level | |||
| Remove | ||
1 | Remove the coolant thermostat. |
| |
Engine 642.992/993 in model 906 | |||
Engine 642 in model 907 | |||
2 | Remove expansion element of coolant thermostat. | ||
| Install | ||
3 | Install coolant thermostat without expansion element. |
| |
Engine 642.896/898 in model 906 | |||
Engine 642 in model 907 | |||
| Clean | ||
4 | Mix 5 percent cleaning solution. | Observe safety and usage notes as well as environmental protection regulations from the cleaner manufacturer. | |
Engine 642.896/898/992/993Coolant | |||
Engine 642 in model 907 | |||
Cleaner for engine and cooling system for oil drag-in, 10 l | |||
5 | Pour cleaning solution into engine cooling system. |
| |
Engine 642 in model 907 | |||
6 | Set hot water heater to maximum heating output. | ||
7 | Switch on hot-water auxiliary heater. | Engine 642 in model 907 | |
8 | Warm up engine at average engine speed to operating temperature. | Maintain the operating temperature (approx. 80 °C) for approximately 5 min while the engine is running. | |
9 | Switch off engine. | Allow cleaning solution to cool to approx. 50 °C. | |
10 | Drain off cleaning solution. |
| |
Engine 642 in model 907 | |||
Observe safety and usage notes as well as environmental protection regulations from the cleaner manufacturer. | |||
11 | Fill engine cooling system with fresh water. |
| |
Engine 642 in model 907 | |||
12 | Warm up engine at average engine speed to operating temperature. | Maintain the operating temperature (approx. 80 °C) for approximately 5 min while the engine is running. | |
13 | Switch off engine. | ||
14 | Drain off fresh water from the engine cooling system. |
| |
Engine 642 in model 907 | |||
| Check | ||
15 | Check engine cooling system for any cleaning solution residue and soiling. | If there is soiling in the engine cooling system: | |
| |||
Repeat cleaning process with new cleaning solution, then repeat flushing process with fresh water. | |||
If there is cleaning solution residue in the engine cooling system: | |||
| |||
Repeat flushing process with fresh water. | |||
| Install | ||
16 | Install new coolant thermostat. |
| |
Engine 642.896/898 in model 906 | |||
Engine 642 in model 907 | |||
To do this, remove coolant thermostat without expansion element and dispose of it. | |||
17 | Check engine cooling system for leak tightness. | Engine 642 in model 906, 907 | |
Engine 642 in model 907 | |||
Engine 642 in model 906 |
Engine cooling |
Number | Designation | Engine 642 in model 907 | Engine 642 in model 907 with code H12 (Hot-water auxiliary heater) or code H13 (Rear additional heat exchanger) or code HZ9 (Heater booster) | ||
BF20.00-N-1001-01TS | Coolant | Total filling capacity | Liter | 11,6 | 14,4 |
Corrosion/antifreeze down to 37°C | Liter | 5,8 | 7,2 | ||
Corrosion/antifreeze down to 45°C | Liter | 6,4 | 7,9 | ||
Sheet | |||||
Sheet | |||||