Radiator flush instructions needed

Tiny
BELARUS89
  • MEMBER
  • 2005 BUICK RENDEZVOUS
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 248,000 MILES
How to back flush heater core?
Wednesday, August 22nd, 2018 AT 10:05 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

The best way to flush the core is to remove both hoses and use a garden hose and run it back and forth through the core until you get an equal amount of water from both sides. Make sure it is clean water coming out.

If you do not get an equal flow, then the core will have to be replaced.

Roy
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Wednesday, August 22nd, 2018 AT 12:37 PM

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