What Is a Collapsed Hose?

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Hoses are used extensively throughout your engine, and they’re all subject to pressurized fluid. However, collapse is usually only a problem on radiator hoses – generally the upper hose, and only in certain situations.

During normal operation, your hoses should appear the same visibly whether the engine is hot or cold. Bulging or collapsing are both signs of problems in the system, albeit different problems. If you’ve noticed that your upper radiator hose has collapsed, there are a couple of potential culprits.

What causes a radiator hose to collapse

The primary concern here is vacuum in the system created as the engine cools. If your radiator cap is not releasing pressure on the system, it can cause a vacuum to develop (coolant is unable to move to the reservoir/overflow tank). This can collapse the upper radiator hose.

Another potential issue is a blocked overflow hose. This will cause the same symptoms as a faulty radiator cap. There’s also the potential issue of a clog somewhere in the cooling system creating a vacuum and causing the hose to collapse on itself. However, the amount of vacuum created by a clog in the system is often not enough to collapse a new hose – it can be a sign that your hose is deteriorating and should be replaced.

Some hoses have wire reinforcement woven into the rubber of the body. If some of the reinforcement is faulty or broken, it creates a weak spot in the hose, and collapse can happen. If you have a collapsed hose, there’s definitely a problem in the system. The first suspect should be the radiator cap, and/or a faulty hose, but there are other possibilities that should be ruled out as well. A professional mechanic can help determine the actual underlying cause.


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Recent Radiator Hose Repair reviews

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YourMechanic Radiator Hose Repair Service

Average Rating

4.9/5

Number of Reviews

551

Rating Summary
511
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5
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511
23
5
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8

Andrew

10 years of experience
23 reviews
Andrew
10 years of experience
BMW 323i - Radiator Hose - Cape Coral, Florida
Repairs completed today on our BMW were performed in a very professional and expedient manner by Andrew. We would definitely recommend Andrew.

David

14 years of experience
56 reviews
David
14 years of experience
Audi A6 Quattro - Radiator Hose - Antelope, California
Very efficient was able to replace the parts in no time. Other work will need to be done on my car and I will use him again here shortly!

Mazyar

6 years of experience
97 reviews
Mazyar
6 years of experience
Kia Rio - Radiator Hose - Stone Mountain, Georgia
I’m always satisfied with Mazyar’s work. I trust him to recommend the services I really need, and I’ll book him in future.

Robert

5 years of experience
19 reviews
Robert
5 years of experience
Chrysler 200 - Radiator Hose - Duarte, California
Although Robert was not able to keep the time of our appointment, he called me to let me know he was running late. Once he got there he was prompt and efficient with his work. I was very pleased.

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