1. How to Diagnose a Faulty Radiator Pressure Cap

2. The radiator pressure cap contains two valves and its purpose is to store coolant and ensure that the radiator system remains pressurized.

3. The interior of the radiator needs to be maintained at a fixed pressure, which is controlled by the radiator cap.

4. And if the pressure is not constant, then the car might overheat and the radiator might endure severe damage.

5. Here are a few signs that will let you know if you have a faulty radiator cap.

6. Coolant leaks

7. When the radiator cap is stuck, fluid cannot get released and this will cause pressure to build inside the radiator, causing the hose to leak or break open.

8. If you notice coolant fluid near the radiator cap, then you clearly have leaky coolant and check the radiator for holes in it and if the cap looks worn or damaged.

9. Overflowing reservoir

10. Coolant goes into the reservoir tank as it expands while the radiator cap is released by the pressure and the coolant is sent to the overflow tank.

11. If you have a bad radiator cap, then the coolant will get released too quickly and cause the reservoir to boil over.

12. Collapsed radiator hose

13. A common symptom of a bad radiator cap is when the radiator hose collapses and inspect the cap to see if there is any damage.

14. The vacuum won’t be released by the radiator cap properly and it will cause the radiator hose to collapse during the cooling down period.

15. Air in cooling system

16. Leaky coolant, or air in the cooling system can lead to an overheated engine, so when the engine gets too hot, don’t look under the hood unless you’ve turned the engine off.

17. That way, the engine can remain cool as you check it out and If there is coolant fluid near the radiator cap, there could be damage to the pressure cap.

18. Overheated engine

19. Leaky coolant, or air in the cooling system can lead to an overheated engine, so when the engine gets too hot, don’t look under the hood unless you’ve turned the engine off.

20. That way, the engine can remain cool as you check it out and If there is coolant fluid near the radiator cap, there could be damage to the pressure cap.

21. So, what to do?

22. Always check the radiator cap as it is an important part of the radiator and cooling system for keeping your car in good working condition.

23. Also make sure that the coolant is topped up as if it remains consistently low level, then it can result in the damage to the radiator as well as the cooling system of the car.

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