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Overheating problems

Tiny
DAWN CHAMBERLIN
  • MEMBER
  • 2002 CHEVROLET VENTURE
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 226,865 MILES
So I just bought this van like 5 months ago. But when I sit at a traffic light or go through a drive thru the van starts to get hot so I turn on the heater. But the other day just got on the freeway and about 5 miles I noticed the temperature was pegged out on hot. So I immediately pulled over let it cool. Then filled with antifreeze and water, bleed the system and it worked. But today it did the same thing. Please help.
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Sunday, June 13th, 2021 AT 12:17 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

Since you had to add coolant and bleed the system, it sounds like you have a leak. You will need to pressure test the system to determine the source of the leak.

https://www.2carpros.com/articles/car-is-leaking-coolant

https://www.2carpros.com/articles/radiator-pressure-test

I would also recommend replacing the thermostat as well since it has overheated.

https://www.2carpros.com/articles/replace-thermostat

This engine has many common places for leaks. The intake manifold is common, the water pump is common and head gaskets are the most common.

https://www.2carpros.com/articles/head-gasket-blown-test

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Do the pressure test and let us see where the leak is located.

Roy
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Sunday, June 13th, 2021 AT 2:10 PM

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