Coolant leak

Tiny
CHARLESTUCK
  • MEMBER
  • 2010 CADILLAC DTS
  • 88,500 MILES
Coolant leak at the engine end of the top radiator hose. It is leaking at the bolt to the left. See the photo.
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Monday, April 22nd, 2019 AT 6:46 AM

4 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Did you try tightening the bolt? Sometimes a bolt, like the one in your picture (thank you by the way) will back off slightly, just enough to allow a minor leak, like the one in your picture. Try it and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros.
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Monday, April 22nd, 2019 AT 8:23 AM
Tiny
CHARLESTUCK
  • MEMBER
I tried to tighten it and couldn't tighten it any more. Is there a copper washer or seal in/under there? Could that part be cracked? What is that called?
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Monday, April 22nd, 2019 AT 8:57 AM
Tiny
CHARLESTUCK
  • MEMBER
What is the name of that part where that bolt is?
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Monday, April 22nd, 2019 AT 8:59 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello again,

I believe that is going to be your thermostat housing. There should be an O-Ring gasket in there that might have failed. I have included some diagrams for you in the diagrams down below. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Monday, April 22nd, 2019 AT 11:52 AM

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