Missing antifreeze/coolant

Tiny
ALICEBC
  • 2000 DAEWOO NUBIRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 157,000 MILES

Where can antifreeze be going or leaking from, no puddles under the car, new overflow tank did not resolve the problem? Is this a costly repair?

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Wednesday, May 25th, 2011 AT 3:19 AM

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Tiny
CARADIODOC
  • EXPERT
  • 26,041 POSTS

Kinda hard to tell over a computer but if you aren't finding any leakage near the engine, suspect a leaking head gasket. There are two tests that might confirm this. One involves drawing air from the radiator through a glass cylinder with two chambers partially filled with a special dark blue liquid. If combustion gases are present, the liquid will turn bright yellow.

The second test involves adding a small bottle of dye to the coolant. After driving a few miles, you search for the leak with a black light, including at the tail pipe. The dye will show up as a bright yellow stain.

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Wednesday, May 25th, 2011 AT 4:13 AM

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