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What is Causing Steam to Emit from my EngineCoolantContainer?

Tiny
SRPYLE
  • MEMBER
  • 1993 LEXUS ES 300
After a ten minute drive, Steam begins to rise from under my hood. The Temperauture Guage NEVER rose. As I pull over, Open the Hood, and have a look, I notice that the Steam is Spraying out of the Overflow Cap for my Engine Coolant. And the Coolant will be boiling in the Container, and my Temperature Guage never moved.
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Monday, October 10th, 2011 AT 7:23 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
I recommend having the system checked. Based on your description, it sounds like the engine is overheating. If it isn't, you may havea bad head gasket allowing compressed air from the engine to enter the cooling system and forcing coolant out. Try this. With the engine cold, remove the radiator cap and start the engine. If the coolant starts shooting out, you have a bad head gasket.
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Monday, October 10th, 2011 AT 7:54 PM

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