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Hello! I have a Honda Civic, and I believe that my radiator cap is leaking. There is a huge wet spot inside my hood, right around the area near the radiator cap, and I believe it's rusting (?). There are wet, orange, brown, mucus-like blobs within the wet areas. I definitely want to fix this ASAP. is there anything I can do to fix this problem myself? Also how do I identify the cause of the leak on my own? Looking to do whatever I can to alleviate this issue--or fix it, if possible--on my own first. If I do need a mechanic to fix this problem, how much money do you think that would cost? Just a ball park estimate? Thank you!

Answers from the Automotive Experts

Jessica Howe, Automotive Expert & Coach at AskPatty.com

Hello, 

Thank you for writing in. If you have a bad radiator cap, you will be able to see the leak coming from underneath it. Turn on the car and let it warm up. Look for the source of the leak, and focus particularly at the radiator cap. If the cap has failed, then you will need to replace it. They are relatively inexpensive and easy to replace on your own. Technicians can also test the radiator cap with the right tools. For more help, contact your local AskPatty.com Certified Female Friendly repair center. 

Good luck!


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