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How do you flush the radiator ?

post #1 of 19
Thread Starter 
Hi there,

Just wanted to know what is the best way to flush the radiator ?

Thanks.
    
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post #2 of 19
Flush it with a ratio of 10% vinegar and 90% distilled water. Do it a couple of times until there is nothing left coming out with the water.
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post #3 of 19
If your talking on a vehicle, you go to the auto parts store and buy radiator flushg kit. you pour it in your coolant. run the vehicle for like 5 minutes. you pull either the lower radiator hose off the car or the plug out of the bottom of the radiator (some cars do not have the plug on radator like say an 09 yukon). while the fluid drains out with the vehicle off you put a water hose in the radiator filler spout or the cooalt jug and let it run till you see nothing but clear water coming out the bottom. next you resecure either the hose or the radiator plug. refill the coolnant leave the cap off when full. start the vehicle and rev the motor to about 2000 rpm with the heater on (this is needed becuase some cooling systems have water contorl valve for the heater core) after you see no more big air bubbles comin up in radiator or jug fill the rest of the way up and put cap on. know driv ethe vehicel and you may see the temp gauge get high for a minute. this is normal because you have air bubble in the cooling system still. it will go away after the system burps itself. that it in a nut shell. i hope you ment vehicle cause if not i will feel dumb for writing all of this.
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post #4 of 19
Quote:
Originally Posted by Pencuri;13040585 
Flush it with a ratio of 10% vinegar and 90% distilled water. Do it a couple of times until there is nothing left coming out with the water.

Pretty much this. Solution recommendations vary. I do a 4:1 distilled water/distilled white vinegar solution. Some people recommend boiling water too, but I've never had problems with the vinegar treatment.
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post #5 of 19
Flush with Boiling water. Then flush with distilled.
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post #6 of 19
Quote:
Originally Posted by lp75220;13040645 
If your talking on a vehicle,.....

i hope you ment vehicle cause if not i will feel dumb for writing all of this.

tactical_facepalm.jpg

Now its the time to feel dumb. OFC he is not talking about vehicles, its a Water Cooling thread on Overclock.net
post #7 of 19
I couldn't be bothered getting vinegar just for this or even stinking up the radiator. I poured tap water into my kettle, boiled it and nearly filled the radiator with it. I shook it to death for a few minutes and then emptied it. I repeated this once more. To finish, I put some demineralised water into the radiator, shook it vigorously and emptied it. This was to flush out whatever crap the tap water left inside.

Result?
No visible "polluting" of my coolant (demineralised water & PT Nuke) once I started using my loop. Everything is clean.
    
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post #8 of 19
1:4 5-10% white vinegar with distilled water is used as the vinegar is highly acidic, that acid will react with the welding flux used to join the copper tubing and laminel/laminal of the radiator. Often that flux if not reacted and flushed out before (new) radiator use, it may get into the loop and now you will have little bits of "stuff" in the loop, pump, blocks... Vinegar is also a mild antibacterial agent as well, so its a safe bet that it will take care of most if not all the critters in the rad, before installed.

At the end of this flush, rinse well with distilled water until no more blue-green reacted material is ejected from the rinse, no need to introduce that much acid into the loop needlessly, it may be hard on your coatings and plumbing.
 
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post #9 of 19
Quote:
Originally Posted by lp75220;13040645 
If your talking on a vehicle, you go to the auto parts store and buy radiator flushg kit. you pour it in your coolant. run the vehicle for like 5 minutes. you pull either the lower radiator hose off the car or the plug out of the bottom of the radiator (some cars do not have the plug on radator like say an 09 yukon). while the fluid drains out with the vehicle off you put a water hose in the radiator filler spout or the cooalt jug and let it run till you see nothing but clear water coming out the bottom. next you resecure either the hose or the radiator plug. refill the coolnant leave the cap off when full. start the vehicle and rev the motor to about 2000 rpm with the heater on (this is needed becuase some cooling systems have water contorl valve for the heater core) after you see no more big air bubbles comin up in radiator or jug fill the rest of the way up and put cap on. know driv ethe vehicel and you may see the temp gauge get high for a minute. this is normal because you have air bubble in the cooling system still. it will go away after the system burps itself. that it in a nut shell. i hope you ment vehicle cause if not i will feel dumb for writing all of this.

It's ok. I'm a tech guy, and I was thinking automotive radiator flush as well. here, have a cookie for a good writeup.
post #10 of 19
Thread Starter 
Yeah it was for watercooling but doesn't matter lol Thanks a lots for the tips guys.
    
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