Coolant loss

Tiny
DAVE41180
  • MEMBER
  • 1995 BMW 318I
  • 175,000 MILES
Just fixed the coolant hose connector. Emptied radiator added more coolant and started car to bleed air out. Coolant level dropped and we added more. The engine overheated so we loosened the cap slowly and let coolant bubble out. Test drove it and it drove fine. Second test drive it overheated due to low coolant. So the next day I topped off coolant and got car to normal operating system and it stayed at that temperature but the coolant dropped 4 inches in reservoir. No signs of leaks on ground. Any ideas on where the coolant is going?
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Saturday, December 12th, 2020 AT 12:28 PM

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Tiny
KASEKENNY
  • EXPERT
If you have no external leaks and the engine is overheating, I am thinking you have a head gasket issue. Here is a guide on how to test this:

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

Also, we need to pressure check the system and see if it will hold pressure. Here is a video that will help with this:

https://youtu.be/W8kra65m15c

Let us know what you find with this and we can go from there. Thanks
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Saturday, December 12th, 2020 AT 3:07 PM

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