Posted by Steve@Advance on June 07, 2020 at 10:53:35 from (66.169.147.211):
In Reply to: Radiator cleanee posted by Plowhand on June 07, 2020 at 09:04:43:
I've seen them too, but can't make a recommendation because I don't have the courage to use them!
I assume this is on a tractor or some equipment that has a brass core radiator. If it's aluminum, just replace it.
Typically a radiator gets clogged with calcium deposits, which require an acidic cleaner to dissolve and dislodge them. Putting an acid that strong through the engine is very likely to cause other damage, like finishing off freeze plugs, causing a seeping head gasket to open up, or finishing off a rust pitted cylinder liner.
If you want to try a cleaner, I would remove the radiator, cap the hose connections, and treat only the radiator. Then thoroughly flush and rinse to be sure the acid doesn't get carried into the engine. When the radiator is back in, before connecting the upper hose, take the thermostat out, run the engine at mid throttle with the hose running in the radiator to flush the block until the water runs clear, then drain the block if possible, reinstall the thermostat.
But, good chance it will start the radiator leaking. If it does, time for a recore (expensive but the best long term fix) or buy a replacement radiator, depending on the size and application.
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