What Is a Collapsed Hose?

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.


Next Step

Schedule Radiator Hose Repair

The most popular service booked by readers of this article is Radiator Hose Repair. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Radiator Hose Repair reviews

Excellent Rating

(658)

Rating Summary
611
28
6
5
8
611
28
6
5
8

Chris

22 years of experience
2024 reviews
Chris
22 years of experience
Volvo S60 - Radiator Hose - Sun City, California
Did a great job, was knowledgeable, explained everything to me. Could have overcharged but actually saved us money by lowering the labor hours!
Chrysler 200 - Radiator Hose - Perris, California
Was very knowledgeable and arrived on time for both appointments. I would definitely recommend Chriss he got the job done fast and I was even provided with 2 bottles of anti-freeze (not the cheap stuff) lol service was outstanding

David

13 years of experience
336 reviews
David
13 years of experience
Infiniti G37 - Radiator Hose - Marietta, Georgia
David arrived promptly -- even a bit early -- replaced both radiator hoses in a timely fashion and informed me of everything he did, including test-driving the car. Efficient and professional.
Dodge Charger - Radiator Hose - Marietta, Georgia
I highly recommend David. He takes the time to show and tell me exactly what's wrong, has a plan / solution to the problem, very professional, and easy to talk to about the problem.

Chuck

10 years of experience
253 reviews
Chuck
10 years of experience
BMW 335i - Radiator Hose - The Colony, Texas
I have used Your Mechanic maybe 10 times for my BMW. Each time Chuck has been able to take care of it without a hitch. Anytime I need work done, I will work with Chuck.

Caz

17 years of experience
76 reviews
Caz
17 years of experience
Infiniti G37 - Radiator Hose - Marietta, Georgia
Caz was expert, personable and informative, explaining the problem and all the steps he was taking to correct it. Hope to have him work on all my cars in the future when needed.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How Does Hot Weather Affect Car Hoses?
Hoses Hoses are vital to the operation of your engine. They send vital fluids from one part to another. There are several critical systems under your hood that use hoses, but one of the most important (and most susceptible to...
Can Cracked Hoses Be Repaired or Do They Need to Be Replaced?
Most Most hoses are made of rubber. Some hoses are reinforced, but rubber remains the primary construction material. Rubber offers the right mix of capabilities – it can easily expand and contract with temperature fluctuations, it’s relatively light, and it’s...
Symptoms of a Bad or Failing Heater Bypass Tube
If you see coolant leaking under your car or smell coolant from your car, you may need to replace the heater bypass tube.

Related questions

I do not know where my brake booster vacuum line connects to my engine.

The HHR comes with two different motor options, so this complicates my answer a bit. Either way, the best method is to follow the hose at the brake vacuum booster to where it connects on the motor. Even better, simply...

What Causes Engine Hoses to Leak?

Hose leaks are caused by a variety of issues. The first of these issues is, of course, normal aging. As the hose material ages, it becomes weaker. The hose has been subjected to innumerable thermal cycles (heat up and cool...

Radiator hose rubbing pulley after minor accident

Thanks for inquiring about your vehicle. A collision specialist needs to examine the vehicle and YourMechanic does have specialists who could perform a mobile examination and arrange repairs. To save you some money initially you might attempt to contact a...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com