Toyota 4runner Radiator
Signs of a Bad Toyota 4runner Radiator
The powerful engine of the Toyota 4runner relies on a working radiator to keep it in ideal operating conditions. If any part of the cooling system fails, then the chances of overheating dramatically increase. As far as the 4runner is concerned, its radiator is known to have various performance issues. Some of these concerns even require various forms of big repairs and modifications as a preventive measure or solution. Here are some of the common signs to know if you have a bad one installed in your truck:
Pink or strawberry milkshake-like liquid inside the radiator
One common problem of the 4runner's radiator is when the liquid circulating inside it looks a lot like pink or strawberry milkshake. This is formed by the combination of water, engine coolant, and transmission coolant. The first two are expected to be part of the engine's cooling system. However, transmission fluid is a foreign substance that shouldn't be part of the mix. A fault in the design of stock radiators is the main cause of the defect. As a solution, you can either install a new one in your car or get an external transmission cooler to prevent this from happening.
Head gasket issues
The head gasket in the Toyota 4runner is prone to unexpected failure. This type of problem isusually caused by the bad rubber used on the seal. The issue becomes more likely when the truck has a hot engine because of a flawed radiator and ruptured cooling hoses. Check the exhaust pipe for unusual smoke and perform a pressure test to ensure that the system is intact.
Slow death for the engine
Difficult uphill climbs, low acceleration, wild temperature readings, and clicking sounds are some of the signs of a 4runner engine that is slowly dying. This is usually caused by two things: a clogged cooling system or a bad thermostat. When the radiator and hoses are clogged, it means that the liquid running inside is too dirty to freely flow. It's also possible that the door of the thermostat might not be opening to allow proper circulation of the liquid.