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  1. #1
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    Default How long can I leave radiator flush in the system?

    I want to add a bottle of Wynns Radiator Flush to my Jeep's cooling system to help clean it out thoroughly before I replace the viscous fan clutch, water pump and thermostat.

    I was thinking of tackling the above-mentioned over the weekend...

    Would it be safe to pour the radiator flush in now, and leave it in until the weekend, or should I rather put it in Saturday morning, run the car, and then work on it?

    Thanks in advance!

  2. #2
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    Louis Trichardt
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    Default Re: How long can I leave radiator flush in the system?

    Quote Originally Posted by Kalahari Vegmot View Post
    I want to add a bottle of Wynns Radiator Flush to my Jeep's cooling system to help clean it out thoroughly before I replace the viscous fan clutch, water pump and thermostat.

    I was thinking of tackling the above-mentioned over the weekend...

    Would it be safe to pour the radiator flush in now, and leave it in until the weekend, or should I rather put it in Saturday morning, run the car, and then work on it?

    Thanks in advance!
    No don't put in in now. Rather put it in on Saturday. Bottle says something about 20 minutes if I remember correctly? Or was that a 20km drive, it's fun forgetting these things
    My Life Loving It


  3. #3
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    Default Re: How long can I leave radiator flush in the system?

    Quote Originally Posted by Chris G View Post
    No don't put in in now. Rather put it in on Saturday. Bottle says something about 20 minutes if I remember correctly? Or was that a 20km drive, it's fun forgetting these things
    Yes the bottle says to run at fast idle for at least 10min or up to 20km..

  4. #4
    Join Date
    Sep 2007
    Location
    Pretoria
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    Default Re: How long can I leave radiator flush in the system?

    Be sure to use HOAT antifreeze/coolant additive. Mopar is the best bet (and fairly reasonably priced) but otherwise a decent branded product.
    Andre Louw

    4 XJs, 2 TJs, 2 KJs, 2 WJs, 2 WKs, 1 XK

    2010 JKU Rubicon

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