How To Clean & Restore Coolant Tank – PERMANENTLY Acceleration & Sound by turboandstance - September 11, 2020September 12, 2020 It’s been 5 years since this guy hasn’t cleaned his car coolant tank, therefore, he decided to use an easy method to clean it. Things he used in cleaning: 1. H₃NSO₃ – Sulphamic Acid Mixture; 2. Sonax Ultra Cleaner; 3. Dishwasher salt; It was the hardest to get the results was the yellowness of the coolant tank. Scrubbing is dead useless here, since the yellowness you can 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. Leave a comment