After replacing the heater core it hesitates and smokes after running for a awhile?

Tiny
LARRY M HARRISON
  • MEMBER
  • 2002 MERCURY SABLE
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 164,000 MILES
The car listed above is a GS model. I changed heater core and assembly now it hesitates and smokes when running awhile on the side the water pump on.
Sunday, March 21st, 2021 AT 7:05 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Check the hoses for leaks around the heater core are. You need to pressure test the system.

https://www.2carpros.com/articles/radiator-pressure-test

https://www.2carpros.com/articles/replace-heater-hoses

I attached a YouTube video of the heater core procedure below.

https://www.youtube.com/watch?v=iqCQpsGY49I

Roy
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Monday, March 22nd, 2021 AT 5:14 AM

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