6 Symptoms of a Bad Radiator Cap - What Studies | Knowledge

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6 Symptoms of a Bad Radiator Cap

The internal combustion engine produces a lot of heat just from normal functioning. If the heat of the engine doesn’t exhaust it can cause serious issues and eventually lead to the engine seize up. 

Similar to any bad the thing that happens with the cooling system of the vehicle; it raises the temperature of the engine from the normal limit as a result complete engine failure occurs.

In this article, we will discuss common causes of a bad radiator cap, it's better to know what are the signs and when to replace the cap?

Common Symptoms of a Bad Radiator Cap:

(1) Coolant leak:

The radiator cap holds more pressure than the system is designed for, but when the cap gets older it may be a leak. It also causes happens when the cap didn’t allow excess pressure to bleed when the system reaches the required pressure. If the system is over-pressurized the coolant gets leak from the weak point. The leak may be at radiator, gaskets, hoses or cap itself. You can detect the leakage by heating up the engine to gain pressure in the engine and carefully inspect the leak by under the hood. Different companies use different kinds of coolant, it is either blue, red, green, orange and yellow. Sometimes these leaks appear at the normal pressure or after when you drive for a while. In this condition the pressure is within the normal limit, you might notice leakage of coolant into the engine bay, or even sprayed straight into the air. To find the location of the leak, wait for the engine to cool down and then pinch the hoses which you find suspicious. If the coolant leaks from the pinched hose, then it indicates that the hose is needed to be replaced. Coolant hoses are easy to replace and very cheap in price.

(2) Overheating Engine:

A Bad radiator cap is the main cause of engine overheating because it failed to maintain the required pressure of the vehicle. The ineffective seal is not able to hold the coolant in the radiator, as a result, the volume of coolant decreases, and this can cause overheating of the engine. When you see the temperature of the engine rises on the infotainment system while driving. It is better to stop the vehicle for a while and let the engine cool down if the temperature of the engine reaches within the safe limits then take your vehicle to the mechanic for details checkup. If you ignore the temperature raises and continue driving it can lead to the engine failure due to the excess heat.

(3) Steam from the Engine:

When the coolant reaches a boiling point, the coolant turns into steam and evaporates. If the engine steam is coming from the engine it indicates that the coolant is evaporating and escaping though due to the bad seal of the radiator cap. It causes the engine to heat up and as I told you above in severe cases leads to the engine seize up.

(4) Collapsed or Torn Radiator Cap:

Fluctuation in the internal pressure of the cooling system causes the tearing of the hoses when the pressure in the system gets lower it creates a vacuum that collapses one or more hoses similarly over pressurization causes crack and leakage of fluid. Inspect your cooling system regularly and make sure that no hoses are hard or spongy. Because hard hoses are brittle and are unable to take high pressure while spongy hoses are soft and weak therefore it may collapse.

(5) Low Coolant:

If the coolant gets overheat and turns into steam it means that the vapors of coolant are leaving the system and they won’t come back. If you see that level of coolant is dropping with the passage of time it indicates, your vehicle may have a serious problem. It is necessary to maintain the coolant at the recommended level and don’t let the coolant run below this value. If your coolant gets lower (there is a mark on the reservoir to check the low level of coolant) you can use distilled water to keep the level of fluid at normal range. It is recommended that don’t use water for a long time because water contains minerals that accumulate in the pipes of the reservoir and block the circulation of fluid and water also causes corrosion which may form holes in the radiator.

(6) Overflowing Reservoir:

If the radiator cap is damaged, the coolant reaches the reservoir without reaching to the normal pressure in the system. It causes the coolant overflow tank to release the coolant prematurely.

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