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Overheating coolant

Tiny
DUSTONP
  • MEMBER
  • 2010 VOLKSWAGEN ROUTAN
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 105,000 MILES
The needle on the temperature gauge doesn't stay steady. It's been fluctuating between 240 and 260. When I come to a stop or the van is idling, the temperature gauge goes up to 280. I thought the thermostat was possibly stuck and needed to be replaced. I've replaced it and while I was replacing it, it didn't have a gasket and when I pulled off the housing, there wasn't a drop of fluid. The reservoir is full for the radiator as well. What else could be causing these issues?
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Friday, May 24th, 2019 AT 4:09 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This sounds like you could have an air pocket in your cooling system. If an air pocket gets in your cooling system it will not allow your coolant to circulate. To fix this you will need to drain your coolant and refill it from the highest point of the cooling system. This will guaruntee that there are no air pockets present in your cooling system. Get back to us with what you find out.

Thanks,
Alex
2CarPros
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Friday, May 24th, 2019 AT 4:21 PM

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