We had this 2016 Volkswagen Vento visit one of our MotoFyx car repair workshop with a concern relating that of severe engine overheating. There was a frequent need to top up coolant in the car, as the coolant levels were found to be rapidly depleting every passing day. Looking for a permanent fix, as driving the car in such a state was not possible, the car owner reached out to us for immediate assistance.
Upon a detailed inspection of the car by our expert technicians, the source of coolant leakage was observed to be from the coolant thermostat body, wherein the outlet pipe from the coolant thermostat body had developed rust causing coolant to seep through the crevices. As the rust was quite significant and only kept expanding overtime, the draining of coolant thus happened rapidly, the unavailability of coolant inside the coolant tank eventually resulted in overheating.
*Function of the thermostat:
- The thermostat is like a valve which opens and closes as a function of its temperature. The thermostat isolates the engine from the radiator until it has reached a certain minimum temperature
- Without a thermostat, the engine would always loose heat to the radiator and take longer time in warming up
*Symptoms of a faulty thermostat body:
- Engine overheating
- Temperature fluctuation
- Heater fluctuations
- Possible leakage / steam from the engine
- Rising temperature
*Solution:
- The coolant line was completely flushed
- The faulty thermostat was dismantled and replaced with a new thermostat
- Elbow Replaced
- Hose Pipes Replaced
- New coolant was filled