Needing to know why is my reservoir boiling with steam coming out
Hi there - while it is possible that the thermostat is keeping your engines operating temperature too high (coolant temp gauge should always be in the middle of the gauge), the steam and boiling water out of the reservoir could also indicate that the radiator is simply not getting rid of engine heat as effectively as it should be. In either case, there is enough latent heat in the engine to boil coolant to steam as you are experiencing. I recommend an engine overheating inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
Have a car question? Get free advice from our top-rated mechanics.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing