Q: Slow leak on left side of the radiator, no heat

asked by on November 10, 2016

My left side of the radiator has a slow leak, I see some fluid on the left top of radiator, also I don't have heat. Not sure if it's a leak in the radiator or if it's the thermostat. Thanks

My car has 130000 miles.
My car has an automatic transmission.

The radiator leaking coolant would be the the most important leak to repair first. The thermostat can be checked by watching the temperature on the gauge to see if the temperature gets up near the middle of the gauge and then stabilizes there. If the temperature keeps rising then you most likely need the thermostat replaced along with replacing the radiator to correct the leak and the heater not working. If you need help having this diagnosed, a certified technician from YourMechanic can come to your car’s location to locate the leak and follow through with repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

How to get to the windshield washer reservoir.

Your washer fluid reservoir is located in the right (passenger) side of the vehicle. To access the tank for removal/replacement, you must remove the right fender liner which is the black plastic that surrounds the interior of the wheel well....

Can a bad thermostat cause me to have to keep putting coolant in my car?

Hi, thanks for writing in. The thermostat in the engine cooling system is a valve that opens and closes as engine temperature fluctuates. The purpose of the valve is to keep the engine operating temperature at a relatively constant, optimal...

Drive belt squealing

Hello, if there is a noisy belt, belt condition should be checked to see if the belt are stretched out or dry. While the engine is running the idler and tensioner pulley should be checked for noisy bearings. This engine...

Related articles

How to Diagnose a Fluid Leak
If you see fluid leaking from your car, it's a problem. Determine where the leak is coming from, what type of fluid it is, and the best way to fix it.
How Does a Radiator Keep an Engine Cool?
Car radiators cool off your engine and prevent your engine from overheating. Coolant absorbs engine heat and dissipates it through the radiator.
Symptoms of a Bad or Failing Oil Cooler
Common signs include oil or coolant leaking from the oil cooler, oil getting in the cooling system, and coolant getting in the oil.