Design | |
Thermosiphon with vane water pump. Thermostatic control. With separate expansion tank. Electric fan, switched on and off from control unit | |
Coolant: a mixture of soft water and antifreeze (1:1), this composition provides frost resistance down to -37°C | |
Antifreeze | MB No. Q1 03 0002 or Glysantin Protect Plus/G482 |
System volume upon replacement, l | |
| 8.5 |
| 7.5 |
| 10.5 |
| 11.9 |
| 12.4 |
| Coolant composition | |
The proportion of antifreeze in the coolant to ensure frost resistance | |
| up to -37°C | 50% |
| up to -45°C | 55% |
| Pressure in the system | About 1.2 atm. (the exact value is indicated on the expansion tank cap). The lid should withstand pressure for two minutes. |
Thermostat | |
| Valve stroke | not less than 8 mm |
Petrol engines | |
| 87±2°C |
| 102° |
Diesel engines | |
| 92° ±2°C |
| 102° |
Fan thermal switch | |
| Switching on/off 1st stage | 92-97/84-91°C |
| Switching on/off 2nd stage | 99-105/91-98°C |
Expansion tank cap | |
The excess pressure valve opens, atm. | |
| Step 1 | 1.4 ±0.1 |
| Step 2 | 2.0 ±0.1 |
| The vacuum valve opens | 0.1 |
The valve opening pressure is indicated on the cover in atm. x 100. If, for example, the cover says "140/200", we are talking about a two-stage cover and the valve opening pressure is 1.4 and 2.0 atm. | |
Air conditioner refrigerant | |
| Type | R134a (do not use R12) |
| Volume, gr. | 750 |
Refrigerator oil | |
| Type | A001 989 0803 |
| Volume, cm³ | 120 |
Tightening force of threaded connections, Nm | |
Tightening torques for fasteners are also given in the text of the Chapter and in some illustrations*. | |
*Tightening torques highlighted in bold in the text must be strictly observed; efforts not shown in bold are only approximate. | |
Coolant plug on the cylinder block | |
| 40 |
| 12 |
| 30 |
Water pump mounting bolts | |
4-cylinder petrol engines | |
| 10 |
| 25 |
6-cylinder petrol engines | |
| 14 |
| 35 (with a new distribution mechanism housing 10Nm and 25Nm respectively) |
Belt damper | |
| 25 |
| 35 |
Diesel engines | |
| 14 |
| 20 |
| Pulley to the coolant pump | 35 |
[Article obtained from this portal: MercedesMan]