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1998 Chevy Lumina coolant leak

Tiny
WRING WORM
  • MEMBER
  • 1998 CHEVROLET LUMINA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
I have a 98 chevy lumina 3.1L and I noticed it began to over heat. I changed the thermostat and added an all make and model coolant. After allowing it to run in place then driving I noticed coolant leaking from the firewall when the car is turned off. I then noticed that the car engine calls for Dex coolant. Is this serious or could there be a hose of some sort missing that is connected to the firewall? All of the other hoses and connections do not leak except for an elbow looking connection on the firewall. What is causing the leak? If it is a hose, what does it connect to?
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Friday, March 13th, 2009 AT 12:37 AM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure its not the heater core that's leaking?
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Friday, March 13th, 2009 AT 8:22 AM
Tiny
WRING WORM
  • MEMBER
  • 3 POSTS
No Im not sure. Also smoke comes into the cars vents after driving for 8-10 minutes. Could it be that the leak is due to a hose not being connected going back into the engine? I wonder if where the leak is coming from, can it be capped off closing the circulation?
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Friday, March 13th, 2009 AT 10:59 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If there's an actual leak, you will see it-get the cooling system pressure tested to find where its leaking at.
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Friday, March 13th, 2009 AT 5:40 PM
Tiny
WRING WORM
  • MEMBER
  • 3 POSTS
I fixed the problem (temporarily that is). It was the heating core. I bought a "T" connector and by passed the heating core. That fixed the smoke and the leak. Thanks for your help! All is well!
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Saturday, March 14th, 2009 AT 12:53 AM

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