Coolant Leak at T-Stat

[98EBV8]

Hi,
Recently, I had the thermostat and gasket changed because the coolant was leaking from there. It didn't fix the first time, so I went back to the dealer again and did a pressure test. No leak was detected.

So, they put a bright-green dye in and it leaked again. It probably have been leaking very slowly over a few days to see what's happening.

What can I do to help my technician to fix this?

Thanks,
Shane

 

[dogfriend]

If the bright green dye is a flourescent dye, the tech should be able to use a black light source now to see where the leak is coming from. You could also do this with a black light.

See this thread on A/C dye: Dead Link Removed