Internal coolant leaks are much harder to find than external coolant leaks. For internal leaks, we can use a combustion leak tester, or block tester, to check if coolant is leaking inside the engine cooling system, which may include the engine. If an engine’s gasket goes bad or breaks, since it is supposed to seal and keep things either in or out, antifreeze could leak into a combustion chamber. White smoke leaving your exhaust could be a sign that your vehicle is internally leaking antifreeze, and that it is finding its way into one of your engine’s combustion chambers and getting burnt off as fuel. Sometimes, overheating cannot be explained by a leak, in which case, your coolant might need replacing.
Napa Service Assistant
You don’t have to be an expert to know that preventive maintenance is the best way to make sure your vehicle is running properly. Use our interactive vehicle tool to learn about the maintenance and services your NAPA AutoCare Center can provide.