Thermocure is the best product to clean out the entire cooling system.

After adding clean water with dish soap to wash as much imputities as you can in several runs, use comong white vinegar,wich is an acid and it eats corrosion. Let it run un til hot, then let it seat for 24 hour. Then flush and wash radiator. Baking soda helps to neutralize the acidity of vinegar. It is not just the radiator that is full of corrosion, but the whole system, and you must fight all the corrosion.

A few years ago, GM changed supplier of radiator flush for their diesel trucks, but there was a time when they did not have any radiator flush, so they recommended using Cascade Dishwasher Compound to the dealers. Just the granules in the green box. I never tried it. I have been having a difficult time cleaning the cooling system in my 1959 Ford Fairlane. The modern flush is made for radiators and engines that have aluminum in them, and it is milder than the old products that were made for cars like mine that have cast iron blocks and heads along with copper radiators.

My 96 and 97 cougar both had clogged radiators and resivours. On my 96 I used tap to flush and it would only trickle out (was badly clogged) thew in some blue devil cleaner into the resivour after draining as much as i could from the clogged system. It knocked everything loose and the radiator was letting water fly out the bottom. 3-4 tap water flushes later most of the gunk was gone,

Why are people saying this is an awesome video? The dude clickbaited you guys... Anywho, if you passed through the comments before you finished watching, he buys a new radiator instead of unclogging it after 3 or so tries... Don't waste your time like I did

Thank you for posting this. Great to know. Mabe if the engine was running they could have cleaned better?

Thanks for the advice buying a new radiator is the best way to fix this problem.

Supposed too add vinegar to the bi carb mate 😊

That was an ending I hadn't expected. 😆 Good efforts thou. 👏

I do this alway when by old used car.i drive highmileage cheap cars.i drain old glygol out.water and diswashertablets in.drive my daily drive.heater on max.then flush properly and put new glygol and water,cleans enough for my use.engine cools better and i am gettin warm in capin.in finland we have really hard winterperiod sometimes.

Maybe try Baking Soda, Lemon Juice, and Dawn dish soap. It removes baked on burnt food from stainless steel cooking pans really well

honestly youre right. i just have an old rad i was hoping to clean out a bit but at the end of the day i know its in there good. maybe draino?

Why dies it say best way to clean if you didn't actually get it clean ?

So good 😆

Thank you for wasting my time

Looks like you're looking to clean out the rust corrosion rather than unblocking. A chemical for drain cleaning like crc might do a better job. You also used different methods of application rather than a consistent comparison. Vinegar and citrus acid to take care of the rust.

Honesty - that is what I like - now we know, we should just buy a new part.

New radiator cost $450 for my 1958 Volvo PV444! I can’t afford to buy a new one!

Flushing it out onto the street? Great!!

chuck some degreaser and or wd40 and will do some clean and some pressure air would do some help ,,,,, otherwise new is always new ....

New radiator would work

Your conclusion are wrong on so many fronts for an average DIYer trying to save money.. 1. Even if you had used something to make the area you were looking at shiny, theres no guarantee it would have worked its way through the tubes, because there is no way of knowing how much of the tube length is clogged up with rust sludge. You will never chemically clear a fully blocked tube in a short time.. 2. Had you maintained proper anti freeze levels in the first place the cooling sysytem would never have gotten this dirty 3.CRC make a product called Evaporust. Expensive but does not harm metals. You could fill your cooling system with that for some days and get the surfaces fairly clean. It would not clean a fully blaocked tube though unless you left in there for a very long time. 4. As opposed to the amount of time you spent doing the tests, in 3-4 hours you could have taken off the tanks, rodded the tubes, and hot water pressure cleaned the lot, and re assembled. Cost: 20p vs your 150 pounds.

That looks like rust to me..and nothing is going to clean that..

Clickbait. Dude didn't even try vinegar. Most know kettle and coffee machine is cleaned with vinegar.

Did you try vinegar?

Shouldve poured CLR in and agitated for a few hours. Ive unclogged like 6 radiators with CLR and an agitation machine I custom built. The agitator i made vibrates the radiator with an electric motor. Works like a charm 👍.If you want a professional to unclog your radiator for an affordable price message me 👍.

I filled the system with CLR now its plugged😅

NO No no. If your radiator head comes off you can manually clean it.

Aluma clean acid works

Click bait!

Wasted my time!

Experience make a man perfect good job brooooooooo👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏🙏🙏🙏🤗🤗🤗