Jeep Cherokee Radiator Overflow Tank
Usual Jeep Cherokee Radiator Overflow Tank Problems and Their Causes
You might disagree, but your Jeep Cherokee radiator overflow tank is actually a vital component of your road surfer's cooling system. Although it seems that the overflow tank is just a piece of plastic container with water or coolant inside, it actually keeps the radiator from exceeding its maximum capacity. When the heated coolant expands and fills the radiator, the excess fluid goes into the overflow tank. The tank stores the coolant until it is finally drawn back to the engine as the temperature decreases. With this very demanding job, it is inevitable for the overflow tank to deteriorate and fail. For your information, here are the most common problems of a Jeep Cherokee radiator overflow tank and the reasons behind them:
A Jeep Cherokee radiator overflow tank is usually made of sturdy ABS plastic. Although this material composition makes it highly resistant to rust and corrosion, it still has the tendency to develop cracks after some time. Aside from physical damage due to old age, your vehicle's radiator overflow tank can also be broken during head-on collisions and fender-benders. Any form of damage on the overflow tank's surface will result in coolant leaks, which will surely alter the normal function of your Jeep Cherokee's cooling system. Minor cracks on the radiator overflow tank's body can still be repaired, but if the damage is too severe, you need to replace your stock immediately.
Damaged or clogged hoses
Your vehicle's radiator overflow tank cannot effectively perform its duties if the hoses that connect it to the rest of the cooling system are in bad shape. If the hoses have holes and are leaking, the expanded coolant from the radiator assembly will not be able to reach the overflow tank. This means that instead of being re-circulated back into the radiator to keep the cooling system running, the coolant will just end up in a puddle underneath your vehicle's engine block. The same thing will happen if the hoses are clogged up with contaminants from the other cooling system parts. Both problems can cause the engine to overheat. To prevent this from happening, regularly checking the hoses for holes is a must. Cleaning or flushing the radiator overflow tank and its hoses will also help you get rid of the unwanted debris inside the assembly.
Boil over occurs when the overflow tank is overfilled with radiator coolant. Ideally, the tank should be filled to only one third of its capacity to allow more room for the heated coolant that overflows from the radiator. If the radiator overflow tank is full, the coolant will be expelled from the cooling system through the overflow hose. When this happens, the expelled coolant can cause damage to the hot engine parts as well as to the vehicle's electrical components. To keep this from happening, you must maintain the coolant's prescribed level inside the radiator overflow tank.