The cooling system also incorporates elements of the cabin’s ventilation system, because engine heat is used to warm the car’s interior.

Symptom: An engine’s cooling system is overheating ... which cost from $40 to $200. A simple test for a faulty radiator cap is to simply replace the cap and see if that solves the problem.

Engine health is the most important component when owning a vehicle, and that includes changing your coolant when needed. If not, your car could be in trouble.