Detect a radiator problem

  • When the car is cold, look at the radiator overflow.

  • Open the radiator cap and look inside the radiator.

  • If the radiator is empty, fill with antifreeze or water, and close the cap. The overheating problem may be caused by problems.

  • Flush the radiator if it is not empty but the water is rusty. You may need a new radiator if that does not correct the problem.

  • If it is leaking, flush the radiator and treat with a commercial radiator sealant. You may need a new radiator if this does not correct the problem.

  • Look at both the lower and upper radiator hoses located at the top and bottom of the radiator on the backside and held by hose clamps.

  • Make sure the hoses are securely clamped to the radiator and are not leaking.

  • See a mechanic if the car is still overheating.