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Cleaning inside of radiator + heater core + aftercooler
Gents,
I am experimenting cleaning my HVAC heater core, so that I have more experience when I tackle radiator, engine block and my aftercooler's radiator and its air-to-water box.
The heater core will be by-passed and de-comissioned, so it is good that I use it as practice hardware.
MB Indonesia assembled this car with F*UK-UP water quality and not enough coolant %. In 2014 it was still using the yellow coolant.
I paid the damage from such poor water quality as early as 5th year car age, in 2019.
The story is here : https://mbworld.org/forums/e-class-w...i-am-sure.html
Now, 5 years since this car has received good distilled water and proper 50% coolant concentration, I am still "paying" the sin of MB Indonesia.
.
The plumbing. What used to be INLET to heater core, I make it OUTLET. So I reverse flow it.
The dirt/crust/calcium/slime & yada yada............
.
The slime
Above is approx pump running stop and go for 90 minutes.
The 12V DC pump is not continuous duty, I keep it maximum running 15 minutes at a time.
I am still waiting for a true 5 micron water filter housing and filter cartridge, maybe 2 more days it will arrive.
For now I use those white aquarium filter bed material as filter.
Stages :
- Push out old coolant using distilled water.
- 1st circulation filtering with distilled water and Simple Green cleaner
- Flush with tap water , 3x
- 2nd circulation filtering with distilled water again and Simple Green cleaner.
- flush with tap water,. 2x.
In between circulation and flushing, I use pressurized air while heater core is 1/2 filled with water. That is how I can get a lot of those dirt,
the sudden jet effect of water pushed by gushing air, kicking the debris.
Now heater core has very little water, as I pushed water out using pressurized air. I think left over 15-20% only. I can not dry it 100%.
I shall wait 12 hours to let more dirt/calcium/yada yada to fall off.