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Mechanic used stop leak - now I’m worried! Help

  

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Scotty!!! I love your channel and have been a huge Toyota fan over the years.

The mechanic recently put stop leak in my cooling system on my 2011 Lexus gx460 as a quick remedy to a minor leak by the firewall that was causing fluctuation in the temp. After reading more about stop leak I’m worried about the longevity but don’t know what to do now.  Leave it?  Flush it be best at this point? And try to find and fix the leak. The car has 200k on it so plenty of life left!


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Flushing it out and fixing the leak properly is best if you plan to keep the car a long time.


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