My Brother in laws Renault megane Scenic (petrol, 1600cc)is using coolent at a rate of about 1 litre every 2 days. The car runs OK, does not white smoke, has no apparent leaks (system pressurised to 1.5 bar - held steady). New cap has been fitted -no improvement. Any ideas?
Thanks in advance.
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Sounds like thermostat problem.If it opens late and sudden it overpressurises system.It will expell water from expansion tank cap..Any problems with the temp guage.First sign is usually temp guage goes slightly higher than usual.Then drops to normal when pressure returns to normal less coolant..?
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Steve
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