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Old 03-23-2006, 11:39 AM
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Cleaning a radiator

Best stuff to use to flush out a radiator. I I mean something that will really clean it out with out harming it. Radiator is out. stock copper type. someone mentioned gas as long as you safe about it?????????????????

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Old 03-23-2006, 01:25 PM
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If the radiator is out take it to a shop and have them rod it out. There used to be an excellent radiator and cooling system flush marketed by DuPont. It was a two part system. You dumped the first part in and drove it for a few days then neutralized it with the second part. Prestone makes a flush that is pretty good.

Vince
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Old 03-23-2006, 01:28 PM
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i always wanted to try out CLR household cleaner on a radiator, but have been too scared if it would eat the metal. just from the description, lime calcium and rust remover... might work, and i got a bottle of it in the garage to try, just never had the chance yet....

Last edited by jvsapp; 03-26-2006 at 10:59 PM.
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Old 03-26-2006, 09:31 PM
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I used some kind of two-part "super" radiator flush on two different cars years ago, and it worked well, but maybe too well. Both cars developed leaky water pump shaft seals within a week or two. Might have just been coincidence, though.

I wonder if vinegar would do any good on the scaly stuff.
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Old 03-27-2006, 08:18 AM
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I used CLR in an aluminum radiator (water cooled dirt bike) and it worked fantastic. Poured it in straight and left it in for twenty minutes and then flushed with water.

Carl
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Old 03-27-2006, 08:25 AM
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Gas would be a bad idea. If you want to clean your system, I've used Permatex P/N 18E flushing agent. Follow the directions on the can, but be advised: if you have any weak spots in the system, this stuff will find them and make them leak. It is very agressive.
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Old 03-27-2006, 09:44 AM
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Quote:
Originally Posted by Carl 66
I used CLR in an aluminum radiator (water cooled dirt bike) and it worked fantastic. Poured it in straight and left it in for twenty minutes and then flushed with water.

Carl
cool maybe i need to try it out on a brass one....
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Old 03-27-2006, 11:11 AM
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Take it to a shop and have them clean and pressure check it.For like $30 my local rad.shop does it and it evan comes back spray painted black.
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Old 03-27-2006, 02:36 PM
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i wish we had affordable shops like that here... think it starts at $100 jsut to tank it and pressure test it... it's mostly cheaper to just replace it....
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Old 03-27-2006, 06:24 PM
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I have used toilet bowl cleaner on many Model T radiators and it will work great. Here is your problem with super cleaners and it was aluded to in several replys. It it removes calcium and that calcium is sealing a hole then you get a leak. Any time you use any cleaner you run the risk. One of the things you are paying for when you take it to the radiator shop is that it will not leak when you get it back. That does not mean it did not leak after they cleaned it only that it doesn't leak when you get it back. Harsh cleaners are tough on aluminum so be very careful on what you use and only use it if it is safe for alumnium.
Just one old mans experience
Jan
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Old 03-27-2006, 09:40 PM
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i use cascad the powder stuff for dishwasher and it work great. only use about a cup though don't want to much
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Old 03-27-2006, 10:33 PM
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Yes, do not use the 18E on an aluminium rad, the reaction is quite violent. Should have mentioned that earlier...
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