How To Clean Out A Radiator Over Flow Tank

How To Clean, Whiten, and Restore a Coolant Overflow Tank

Here'due south a tutorial video showing how to clean and whiten (remove the yellow colour) coolant expansion or overflow tanks.

The coolant overflow tank was sitting in this automobile for far as well long and it was simply horrible with a ton of 30-year-quondam sludge, dirt, and discoloration. Skillful quality replacement coolant tanks for this car, an '87 Toyota MR2 don't exist, and used ones are commonly in like condition.

After researching how to clean an overflow tank and get information technology looking like new again.

Cleaning the inside was adequately easy with some common household items; some rice, bleach, a dishwashing tab, and a lot of shaking gave results that are were amend than expected.

The exterior was scrubbed with a dishwashing pad and a bleach and water mixture. Again, the results were decent and 30 years' worth of dirt was gone in mere minutes.

The tank is clean, but all the same yellow…

What was annoying me most of all and where it was the hardest to go the results was the yellowness of the coolant tank.

Scrubbing is dead useless here — the yellowness yous see on coolant tanks is the result of a chemical reaction. The only solution is to whiten/bleach out the ugly yellow color out of the coolant expansion tank. However, this is a lot easier said than washed.

Initial research led to a solution called Retrobright (aka Retr0bright), a chemic mixture used to remove yellowing from acrylonitrile butadiene styrene (ABS) plastic calculator and electronics cases, including computers past Commodore and Apple in the 1980s and 1990s, and various video game consoles and cartridges.

A batch was mixed, merely the results were extremely poor. However, this petty experiment led to the key ingredient to getting my coolant expansion tank white again — hydrogen peroxide.

The product with the highest concentration of hydrogen peroxide I could observe was in hair-care products for bleaching your pilus. On the same alley, I found another product that promised to add an extra kick of aggressiveness into my bleaching formula, information technology was called bleaching powder and when mixed with the hydrogen cream it promised extra bleaching power.

I stocked upwardly and got to work. Results finally started to appear. After several bleaching sessions with the inside and exterior of the coolant tank covered in the bleaching solution, I managed to get about of the yellow color out…
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