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Old 07-13-2004, 06:24 AM
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Radiator flush - KOOL CLEAN, CLR , etc which best to use?

Have to attend to alot of debris in radiator on 67 cutlass w/330 and car has put up for a LONG time.

Was reading old message from Chuck about Kool Clean. Here info on that - quotes here -

" Basically similar to the product "CLR" without the soap so there is little foaming. Works like a charm and cleans head coolant cavities so clean you would think they were fresh cast.
Not cheap though. "

juveteach says :
"FOUND IT !!!!
You will have to call a company called THE CARE EXPRESS
@ 800-339-3880 and ask for item number # 25133, KOOL KLEAN.
It only comes in the gallon or a case.
Its about 30+ and the S/H. "

Any suggestion on best procedure for flush ? What ratio of KOOL CLEAN to use when flush? This radiator is really ruff,are there any pitfalls to avoid when flushing?

As always, Thanks.....

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Old 07-13-2004, 10:19 PM
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Consider taking it down to your local radiator shop and havng it boiled out.

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Old 07-13-2004, 10:37 PM
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I use about a quart for flushing, it's important to mix with fresh water...mixed coolant will neutralize the acid. The active ingredient is phosphoric acid, I run the engine with the cap on while using the product and reverse the heater core connections to reverse flush the core. I prop the throttle at high idle and let her run for half an hour, repeat for heavy deposits.

CLR has too much detergent and foams...a lot!
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

— Han Solo
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