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OTW Back-flush

1282 Views 5 Replies 4 Participants Last post by  woodnthings8
Does anybody have any suggestions on back flushing my OTW portion of my radiator? I know some have said they have just used clean ATF fluid, a friend suggested using mineral spirits to clean up the gunk and help clear it out of there. I know that stuff is flammable and I would have to flush it back out with ATF fluid again. Any other product suggestions? Thanks
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Check your auto parts stores or local transmission shops. They usually have transmission cooler flush in a can, nothing more than a pressurized can of solvent with a hose, but works good. I use it when rebuilt a BMW transmission and I wanted to flush the cooler before hooking up the trans.

Afterwards I run a couple quarts of transmission fluid through the cooler to flush any remaining solvents left over.
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