Author Topic: Coolant drain and fill or "flush"  (Read 166 times)

hsympson

  • Jr. Member
  • **
  • Posts: 73
    • View Profile
Coolant drain and fill or "flush"
« on: May 13, 2017, 08:39:41 AM »
My '12 coolant has never been replaced so I picked up some "engine ice" coolant.  Discussions and video I have seen describing "flush" seem to refer only to drain and refill.  Does anyone actually "flush" the coolant or only drain and refill?  I have read about crud in radiator from factory but the coolant reservior is has completely clear, undiscolored coolant so it seems that if there is muck in the system as I have seen others post that the coolant would be discolored, right?

Thanks

Syd

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 297
    • View Profile
Re: Coolant drain and fill or "flush"
« Reply #1 on: May 14, 2017, 12:00:39 AM »
I flushed mine once. Takes time, but it's not difficult.

hsympson

  • Jr. Member
  • **
  • Posts: 73
    • View Profile
Re: Coolant drain and fill or "flush"
« Reply #2 on: May 14, 2017, 07:31:33 AM »
Flush meaning prestone type (non-acid) flush additive, drive for day or two then drain followed by de-ionized water rinse or like flush with a garden hose?

If everything looks clean/clear on mine I think I'll skip the prestone "flush" but if there is brown crud as others have described I'll probably give it a try.

Syd

  • Global Moderator
  • Sr. Member
  • *****
  • Posts: 297
    • View Profile
Re: Coolant drain and fill or "flush"
« Reply #3 on: May 14, 2017, 11:29:32 AM »
Drain, fill with water and coolant flush (no idea what I used). Ride for a while, drain, fill with water, ride, drain, fill with 50/50 mix. Ride, ride, ride, crash into E-Class Mercedes.

I don't recommend the crash part. ;)

Tromper

  • Sr. Member
  • ****
  • Posts: 285
    • View Profile
Re: Coolant drain and fill or "flush"
« Reply #4 on: May 14, 2017, 11:33:24 PM »
I used the prestone flush in both of mine before I dumped the (bad) oem coolant.
Always tough to say how effective however the red one particularly had been running a bit hot and had trouble activating the fan.
After the flush no issues.  I did get a lot of crud out of it.
08 SYM HD200
07 Suzuki Burgman 650

hsympson

  • Jr. Member
  • **
  • Posts: 73
    • View Profile
Re: Coolant drain and fill or "flush"
« Reply #5 on: May 15, 2017, 08:07:48 AM »
Thanks for the input.  I'll use the flush and see what comes out.