Skip the auto shop - Our mechanics make house calls

What Is a Collapsed Hose?

engine hose collapsed

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

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

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: Hose leaking coolant

Hi there. If there is an obvious leak that you can see then that needs to be repaired first. If it is from a hose then that hose may simply need to be replaced. Once it is replaced the system...

Q: Hose leaking antifreeze

Hello. The most common coolant leak that suddenly occurs on this engine is a water pump malfunction. It will start leaking coolant and it will appear to come from near the rear of the engine. It is also possible that...

Q: Is There a Difference Between a Car's Upper and Lower Radiator Hoses?

The difference between the upper and lower radiator hoses is where on the engine they are used. They are made of the same material (EPDM), so they both meet the requirements of thermal stability, pressurization, and life expectancy. The upper...