coolant leak

2006 MERCURY MOUNTAINEER
75,000 MILES • 4.0L • V6 • FWD • AUTOMATIC
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PEACAT
  • MEMBER
  • 1 POST
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
Jun 16, 2017 at 7:11 PM
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HARRY P
  • ✓ASE Certified Mechanic
  • 2,292 POSTS
  • ASE Certified Mechanic
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.
Jun 16, 2017 at 9:13 PM
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