I have this erosion and rust problem in the water and fills back in the extension tank. Causes leakage and pipe damages oftenly.

what is the best way to flush this rust off my system?
any videos on how TOs is appreciated.

 

I too had rusty coolant and it ended up being my radiator(leaked about a week after I flushed). You can buy a radiator flush at any autoparts store. I used thermocure in mine and it did a wonderful job of cleaning out the coolant and rust in the system. For the product I used, I drained some coolant, added the rust remover and drove the car as normal for some miles ( I forget how many but maybe around 100) Afterwards you completely flush the system. Best way to do this is with a garden hose filling the expansion tank while the car is running and old fluid is draining out the bottom (into a container/pan not just on the ground) and you run it until clear water comes out, and then turn the car off and fill with coolant as normal after.
See RobertDIY's video below. He has tons of useful videos!

 

Thank you. I’m afraid I’d have leakage after I drain all the fluid out using a hose and car running.
I’m planning to flush with water first two or three times . Then add antifreeze and run the car idle to run it through all parts. Then flush it out and refill the tank. Drive and check the fluid level for a few days.

 

Make sure and use either pre-mix ($$$) antifreeze, or use full-strength antifreeze with distilled water (not tap water or even filtered water). That should help prevent future rust.

I just did a flush on my 25 year old Jeep, and it took a LOT of water to get the debris out of the system. I bought a $4 (IIRC) Prestone "flush kit" that includes a hose port that is inserted into a heater hose, giving you a way to push pressurized water into and through your cooling system (by bypassing the closed thermostat). I'm sure I ran a couple hundred gallons through the engine before it was running relatively clean. No waste though - I parked over a tree that needed deep watering anyway (in Arizona, you deep-water trees or do without). ;-)

Running the car with only water is a good plan to help liberate extra rust and dirt - just make sure that you don't overheat it in the process (usually by sitting still in heavy traffic with the A/C running full-blast).

 

Did you flush the system when car was cold and did you just insert the pressure hose into the tank and run the water out from radiator?

 

Did you flush the system when car was cold and did you just insert the pressure hose into the tank and run the water out from radiator?

 

I did the flush with the car cold (but running, so it was warming up). The water was running out the radiator, diverted with the (supplied) adapter to route it away from anything important. The water runs through the heater core (if you set the heat to high), and through the block and then to the radiator (just like it normally does through that line). It sure sped up the whole process, compared to filling and running the car until the thermostat opens, then draining and repeating a dozen (or more) times.

FWIW, here's a (on Amazon, but I picked it up at a local brick-and-mortar store for about the same price).

 

Thank you. I’m newbie for this but will give it a try.

 

Flushing the coolant system on an older car is good but will certainly not fix leaks , identify where the leak is and fix , could be many arears , water pump, radiator , hoses etc , have the system pressure tested to see the leak before replacing parts , rust is probably from the radiator , good luck