That is a Harbor Freight Drummond 1/4 Horsepower pump. Works well. CLR or Pure white vinegar can be used also. Will take a little longer. Afterwards flush thoroughly with clean water and use a little 50/50 antifreeze to remove all water from heater core. You saved $800 to $1000 to replace a heater core.
1 gallon deionized and 1 gallon acid circulate for 10 minutes. Direction with a 1/4 horsepower pump. Then clear with a garden hose and finally clear for the last time with deionized water. refill cooling system with G13 +
I would be VERY cautious of using that. Even at the dilution he recommends it very strong and corrosive. I used just straight white vinegar and it caused a leak in my radiator. If you can get it I would use Citric Acid which is milder and recommended by Mercedes Benz. Even TSP will work fine and is used in most commercial cooling system cleaners. Muriatic is Hydrochloric acid and very strong. Even Phosphoric would be better because it converts the rust to Iron Phosphate which is inert. I've had experience with Muriatic, trust me, you don't want to do it. Brass is pretty tolerant of acid. It will turn copper and aluminum to dust.
@@vincemajestyk9497 if you experienced a leak it is because the connections on your heater core were not put together correctly. This is a job you do say every 100,000 miles or however frequently you like. If you do it more often I would suggest a milder solution
@vincemajestyk9497 Citric acid is used along with salt brine in prestone radiator flush. Weak. Pure white Vinegar can be use as long as heater core is disconnected from cooling system. Then use a Harbor freight Drummond 1/4 pump with clear hoses of either 5/8 inside diameter or whatever your vehicle uses. No need to drop a steering wheel and dash to get to a late model car or trucks heater core. Let Vinegar soak inside heater core for 3 to 4 hours. Then use pump mentioned and flush each side. Inlet and outlet with vinegar running into a clean white bucket. Save your money. 🍻
