Skip the auto shop - Our mechanics make house calls

Q: My truck is overheating, I hear it hissing and I see steam too.

asked by on

When I notice my truck overheating, I look under the hood and see steam coming from the area where the big hose from the top side of the radiator meets the engine; somewhere under the air filter. It's hissing too the whole time. I noticed there is a lot more pressure in that top hose also, its much harder to squeeze for example, even when I turn off the engine. So my question is what part is causing the problem? I don't know what I'll have to replace.

My car has 280000 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in. I’d be happy ...

Hello, thanks for writing in. I’d be happy to help.

Steam from the engine is usually a sign of a small cooling system leak. I would recommend taking a close look at the area where the steam appears to be coming from, to see if you can identify where exactly the leak is located. ] It may be possible that a hose, gasket, or water outlet may need to be replaced. A hard top radiator hose can be considered normal, as it holds cooling system pressure. It will eventually soften as the temperature and pressure of the cooling system go down, as the engine cools off.

If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Guage, fuel and thermostat needles moving very fast

You may have a connection that is getting corroded and is causing intermittent connection problems. If the problem happens again then have the connection to the dashboard cluster disconnected and then add dielectric lube to connection and pins. At the...

Q: Vehicle started running rough while driving. Now running/idling rough running rich.

Hello. From the symptoms you describe, it would appear that your vehicle is having issues with the oxygen sensors. P0172 is the code for bank 1 being too rich. This can be caused by a wide variety of issues. The...

Q: My temperature gauge went all the way up to the red line and came down but then I pulled over 2009 Dodge Avenger

Hello - there are a couple of scenarios which could cause this behavior. If the thermostat fails - sticking shut, or the water pump fails, the engine can overheat very quickly (in seconds) and behave as you describe. A coolant...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...