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BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17468
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Chevrolet: Hey bill I can drive my truck an hour

Customer Question

Hey bill I can drive my truck for about an hour and when I get out I see the coolant after blowing out of the over flow hose.
Submitted: 2 years ago.
Category: Chevy
Customer: replied 2 years ago.
And this happen every time if I drive for 45 mins or more.
Expert:  BOBBYSS replied 2 years ago.
Hello, my name is Bobby. Thank you for the question. The two most common causes of this is either a failing head gasket or a failure in one of the injector cooling sleeve seals. Either way compression pressure will get into the cooling system and cause this. Did you plan on fixing this yourself?
Customer: replied 2 years ago.
Not sure what's involved here I'm sure it's a big job
Expert:  BOBBYSS replied 2 years ago.
The head gasket is actually the most difficult, but the sleeves are not too easy either. It would take some special tools to change and diagnose them. I can tell you how to do it if you want to tackle it.