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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Mar 2008 Posts: 38 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 38 | I am going to try to use the original radiator from the 1928 project. The radiator looks very good, but it has been sitting for several years at least. Has anybody come up with something to clean/flush it without throwing in their billfold? Would something like CLR work? Vinegar and let it sit for a day? Commercial flush products? Any and all advice welcome and appreciated. | | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | Be aware that cleaning an old radiator is risky- - - - -sometimes you dislodge the crud that's plugging up pinhole leaks, particularly if yours is a low-pressure or no-pressure system. There are two basic types of radiator flush, strong detergents that remove dirt and grease, and mild acids that dissolve lime and rust deposits.
Your best bet is to find a radiator shop that's been in business for at least a couple of generations, and ask the gray-haired old man in the shop to do a boil-out, flush, and leak check. The young guys all want to do a recore, or replace that good old copper radiator with a piece of aluminum junk!
Jerry
Last edited by Hotrod Lincoln; 03/13/2010 11:48 PM.
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | Jerry brings up some good points. If you want to chance it Dupont makes a two part radiator flush that comes in a card board can. I have had success with, but it will remove some deposits.
Larry
I don't own a vehicle that isn't old enough to drink.
| | | | | Joined: Feb 2007 Posts: 435 'Bolter | | 'Bolter Joined: Feb 2007 Posts: 435 | As most of the others have said, if you want to do this on your own, try and remember to do the flushing in reverse. From the bottom up. Helps to break out any of the larger scales. And also try and use as hot as water as you can get. Strong detergent seemed to do the best for my task, but I did use some LimeAway added to the mix. So far...not troubles. | | |
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