Overheating issue

2002 SATURN SL2
179,000 MILES • 1.9L • 2WD • MANUAL
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MEGANMICHELLE KRISTIANGRIFFIN
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  • 1 POST
I changed thermostat and radiator. Water pump is working. There is a hose on the top of the coolant reservoir that connects to a metal line that goes into the engine, that line had a crack. Took that off and found it clogged up with what looked like rust. Could this be the issue why the car is over heating? Does anyone know what this line is called so I can order a new one? Thank you
Nov 25, 2018 at 7:42 AM
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KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
Yes. This line is the heater return hose. So if that was clogged, I suspect the vent line was clogged as well. If those are clogged then the system will over heat because the system will get what is called a vapor lock in it and will not be very efficient. Once this happens the coolant will actually boil and the engine will over heat. I attached the detail below on these lines.

Also, here are some guides on how to flush the system as we need to make sure we get that rust out of the system:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Let's run through this and we can go from there. Thanks
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Dec 16, 2020 at 1:48 PM