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Losing antifreeze from the overflow tank

Tiny
DPLOTT88
  • MEMBER
  • 1998 BUICK LESABRE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
We changed the antifreeze and used antifreeze flush to see if it would help. Still losing antifreeze. Have found no leaks.
Monday, June 1st, 2020 AT 5:58 PM

5 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I suspect you have a head gasket issue. You need to start with checking for a blown head gasket using the attached guide.

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

Let us know what you find. There are a number of other causes but those are less likely and are normally accompanied by other issues. Is there any history to this? Did the engine overheat at any point?
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Monday, June 1st, 2020 AT 6:18 PM
Tiny
DPLOTT88
  • MEMBER
  • 3 POSTS
No, our car has not been overheating.
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Tuesday, June 2nd, 2020 AT 8:40 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay. That is good but doesn't rule out a head gasket. Let's run the test from the guide above and rule it out for sure and then we can go from there.
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Tuesday, June 2nd, 2020 AT 7:26 PM
Tiny
DPLOTT88
  • MEMBER
  • 3 POSTS
I'm not sure my husband can do all this as he's disabled.
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Tuesday, June 2nd, 2020 AT 8:20 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Oh, okay. We will help as much as possible but unfortunately this is not the easiest work to do. If he is not comfortable doing it then it may be best to seek some assistance.
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Wednesday, June 3rd, 2020 AT 8:12 PM

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