Radiator cleanee

I've seen a few internal radiator cleaners out there anyone have luck with a partcular brand?..thanks

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.

We have had success using both vinegar and washing soda (not at the same time, of course) with old tractors. Depends on what's built up in them. We've also used old speaker magnets in the top radiator tank to catch rust chunks that wash out of the block. Grab a "throw away" speaker & salvage the magnet out of it. If it doesn't have a way to attach a "fish wire" to it, just drill a hole in it & put one on it so you can pull it out to clean the junk off. Put it in the radiator so it lays in the top tank on the core. Make sure you can fish it out as needed. If you have to cut it down to get in, it'll still atract the rust. DC or CC Case radiators will accept a pretty big magnet.