How can I clean/flush a radiator that's already out of the car?

Discussion in 'Wrenchin' Secrets' started by racerxjj67, Jun 4, 2018.

  1. racerxjj67

    racerxjj67 Well-Known Member

    Is this possible? Tricks and suggestions appreciated.

  2. rex362

    rex362 paint clear and drive

    clr cleaner but make sure u flush it out good or just visit a radiator shop and have them flush it out
    Last edited: Jun 4, 2018
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    If the radiator is clogged, you are wasting your time. Buy a new one.
    Dwayne B likes this.
  4. Dwayne B

    Dwayne B Well-Known Member

    Larry is right, my car was running warm ,tried rad flush, helped A little .I bought A nice champion 2 row 1in tubes radiator on eBay for $178 free shipping .
    It made A big difference, car is running A lot cooler,setting in traffic ,running it hard down the road,temperature gauge stays the same .
    Harlockssx likes this.
  5. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Jeff, I had considerable luck with a Oxalic acid flush.
  6. woody1640

    woody1640 Well-Known Member

    X2 I have used Iron Out too.

  7. racerxjj67

    racerxjj67 Well-Known Member

    Not clogged but could use a fresh cleaning before reinstalling
  8. 12lives

    12lives Engage! - Jean-Luc Picard

    A good radiator shop will remove the tanks and "core" or"rod" it - basically cleaning the tubes by running a rod through them. Best way to clean.
    rex362 likes this.
  9. racerxjj67

    racerxjj67 Well-Known Member

    Hmm, ok, maybe I'll get a quote before doing it myself if it's relatively inexpensive.
  10. Mart

    Mart Gold level member

    Get new, my Modine has been in car since '82. With a 180* stat, it runs at 180*, maybe climbs to 185* if it's 90 degrees outside.

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