8.17.2 Preheater – Function and leak check
Preconditions
☑ Preheater is switched on.
WARNING
Coolant is hot and highly pressurized.
Risk of injury! Risk of scalding!
• Allow engine to cool down.
• Wear protective clothing, protective gloves, and safety glasses / facial protection.
Function check
Note: The preheater operates properly if the measured value of the coolant temperature is within the control range
of the thermostat.
1. Check coolant preheating temperature.
2. Contact Service if the temperatures are out of normal range.
Leak check
1. Check unit for leaks at coolant inlet and coolant outlet.
2. Tighten leaking connections.
MS15054/03E 2018-07 | Preheater | 189
TIM-ID: 0000082043 - 002
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