• Tiny
  • frog-o
  • 1999 Volkswagen Jetta
  • 164,000 miles

I put in coolant and drive about twenty miles park for about an hour and my coolant is low again

Thursday, June 14th, 2012 AT 8:37 PM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 25,257 posts

You can perform a pressure test, then look for coolant leaking out or you can add a small bottle of dye, drive a few miles, then search with a black light. The dye will show up as a bright yellow stain that you can follow back to the source of the leak. Be sure to look inside the tail pipe too.

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Thursday, June 14th, 2012 AT 8:42 PM

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