Skip the auto shop - Our mechanics make house calls

How Long Does a Surge Tank Hose Last?

Surge Tank Hose

Your car’s coolant system is responsible for helping to keep the engine at the correct operating temperature. Overheating can cause serious damage, so coolant is used to absorb heat from the engine and then disperse it into the atmosphere.

When you tighten the cap on the radiator, the coolant system is sealed and it will pressurize as the coolant heats up. The problem here is that coolant expands when it gets hot. Because the coolant system is closed, there must be somewhere for the expanding coolant to go without allowing air in. This is where the surge tank or coolant reservoir comes into play. You’ll usually find it on the passenger side of the car, close to the radiator. A surge hose is what connects the reservoir/surge tank to the radiator and allows coolant to move back and forth as it expands and contracts with heating and cooling.

Like most other hoses on your car, the surge tank hose is made of rubber. It’s designed to withstand heat from the coolant, but it will begin to deteriorate over time. High heat from the engine, contaminants, even exposure to coolant itself will eventually degrade the hose. Throw in the possibility of oil getting onto the hose and you have a recipe for failure (engine oil will deteriorate the hose).

There’s no set lifespan for the surge tank hose, but it’s a common part for failure. It should be inspected at every oil change, and definitely at every coolant system service. In most cases, you can probably expect to see between five and eight years of use form the hose, barring damage from oil.

If the surge tank hose fails, you will lose coolant, which can cause the engine to overheat. There’s also the possibility that the radiator will suck in air, which can also cause the engine to overheat (called airlock). Knowing a few sings to watch for that indicate your hose is close to failure will help you prevent this from happening:

  • Hose has bulges in it
  • Hose feels brittle or “crunchy”
  • Hose feels abnormally soft
  • Signs of coolant leaks at either end of the hose
  • Cracks in the hose
  • Gouges, discoloration or nicks in the hose
  • Overheating engine

If you suspect that your surge tank hose doesn’t have much longer to live or you’re experiencing any of these symptoms, a certified mechanic can help to inspect your coolant system and replace the surge tank hose if necessary.

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

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: How to install the bottom radiator hose onto the radiator. It has a metal fitting and won't stay on properly.

Hello. The lower hose has a twist lock that holds on the lower hose and the radiator outlet has two O-rings. Sometimes the hose will not lock well once removed and most mechanics recommend replacing the hose with a new...

Q: Radiator hose rubbing on pully or a belt

If the accident caused the hose to move closer to the pulley then you may not have much choice but to get the body shop to pull the frame back. If you can move the hose then you could use...

Q: 2002 Mitsubishi Montero Sport XLS is leaking water from the back of the engine by the firewall. What is the name of that pipe?

The pipe that connects to the hose on the back of the engine is the supply pipe to the heater core. If you need further assistance with a coolant leak, then seek out a professional, such as one from Your...