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Coolant leak

Tiny
PEACAT
  • MEMBER
  • 2006 MERCURY MOUNTAINEER
  • 4.0L
  • V6
  • FWD
  • AUTOMATIC
  • 75,000 MILES
After an engine oil change, I was told the drainage plug could not be tight to the pan. So there was oil leak, I had to get the oil pan gasket replaced. And after the replacement, they told me that there was a slow coolant leak.
I drove the car back and stopped the engine and saw a little drippings from underneath. When the engine cools down, I checked again, no dripping anymore.
What possible leak could be? House, radiator, etc.
Is it okay to use K seal coolant leak repair?

Thanks
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Friday, June 16th, 2017 AT 7:11 PM

1 Reply

Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
Honestly, using a stop-leak solution usually does nothing and occasionally makes your problem worse. They are made in a way that the clog up fine little holes. The problem is that your radiator is made up of fine little holes, and they get clogged up, and then your car runs hotter (maybe even overheats) and you probably still have a leak.

My suggestion is to rent/borrow a cooling system pressure tester from the local auto parts store and track down the leak. Here's a how-to guide: https://www.2carpros.com/articles/radiator-pressure-test

Basically, do what the guide says and take a picture of whatever its coming from, and post it here. We will go from there.
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Friday, June 16th, 2017 AT 9:13 PM

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