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Water Cooling With A Car Radiator

sH4RD writes "Why go out and buy a water cooling system when you can do it with an old car radiator? That's exactly what One of The Twelve figured when he used the radiator from his brother's 1979 Toyota Corolla to cool his system. His Athlon64 3000+ can hit 2.5GHz smoothly now. Check out the original forum post complete with benchmarks."

37 of 282 comments (clear)

  1. So... by rusty_razor · · Score: 3, Funny

    If you leave the radiator attached to the car, you could drive your PC to LAN parties!

  2. Well that makes me feel better. by Kenja · · Score: 5, Funny

    After having seen that guys work station, I feel better about he mess in my apartment.

    --

    "Have you ever thought about just turning off the TV, sitting down with your kids, and hitting them?"
  3. Antifreeze by dykofone · · Score: 4, Insightful
    I really appreciate that he still used a glycol/water mixture. Pretty unnecessary, but certainly a nice touch.

    Radiators were made to have a flow of air over them, so putting a fan blowing over that thing would greatly increase its cooling abilities. Of course, he's still stuck with old shitty car parts under his desk...

    1. Re:Antifreeze by Waffle+Iron · · Score: 5, Interesting
      Radiators were made to have a flow of air over them, so putting a fan blowing over that thing would greatly increase its cooling abilities.

      That probably won't be necessary. Assuming that the original car had a 130hp engine with 30% thermal efficiency, and making a wild-ass-guess that 10% of the waste heat of the car actually goes through the radiator (rather than exhaust or other means), my calculations indicate that in the car the radiator would have a peak thermal throughput of over 22 kilowatts. A 100W CPU doesn't need to get rid of even 0.5% of that amount of heat. A fan would just seem to supply even more pointless overkill.

    2. Re:Antifreeze by Anonymous Coward · · Score: 3, Informative

      You can never have too much cooling.

      In some tests I did some time ago, a small car radiator (used to water-cool a PC no less!) had a thermal resistance of 0.093K/W with no fan, and 0.018K/W with a fan. In the case of a 100W CPU, that means the difference between 9.3K temperature gradient compared to only 1.8K, which is very significant.

    3. Re:Antifreeze by Anonymous Coward · · Score: 5, Interesting

      The general rule of thumb for gasoline engines is thus: 1/3 of the power goes to the ground, 1/3 out the tailpipe, and 1/3 into cooling (which includes running fans, and heat actually being carried out of the radiator, and heat radiating off of the exhaust, and all of the other ways heat can possibly be lost)

      Ideally, it would be good to keep as much heat inside the engine as possible. We could actually run much more efficient engines (by running them hotter) if it weren't for materials and emissions (damn that N2 all to hell!) and fuel (gasoline likes to go poof spontaneously when it's hot and compressed) Too bad, that.

    4. Re:Antifreeze by Bilestoad · · Score: 3, Insightful

      I don't think you really understand. A fan can only help a radiator bring coolant to ambient temperature. If this radiator already provide 200 times the required cooling then adding a fan isn't going to make it "much" cooler, probably not "any" cooler.

    5. Re:Antifreeze by BlueAdept · · Score: 3, Interesting

      I did this over a year ago, but my radiator was brand new when I installed it... and it's mounted in the wall in the garage with fans on it... the water is pumped with a central heating pump and piped to 3 PC's in the house.

      Anyone have bandwidth big enough to hold a picture or two because I'd get slashdotted instantly..

      --
      Who is Seg Fault, and what is he doing with Kernel Space?
  4. And? by MightyPez · · Score: 5, Insightful

    I hate to sound like an elitist, but this is fairly common practice for water cooled PC's. Except most people tend to use smaller heater cores. That, and tend to buy them new and clean.

    1. Re:And? by catch23 · · Score: 3, Interesting

      Agreed. I'm using a 1990 Honda Accord radiator that was bought new off of ebay. It was the cheapest radiator that was still new. I use it to cool a total of 3 computer and 2 video cards. The hose adaptors to keep it from leaking were purchased from home depot. I bought a $40 500gph pond pump from petsmart to circulate the system... works pretty well.

  5. Heh... by TWX · · Score: 5, Funny

    They could have pushed it to 3.5GHz if they'd used the radiator from my '78 Chrysler Cordoba. It probably weighs more than the entire car that they pulled their radiator out of...

    --
    Do not look into laser with remaining eye.
  6. Hmmm by ShatteredDream · · Score: 4, Funny

    After looking at his desk area I'm still trying to figure out how he gets air flow to his pc...

    Something tells me that half of this would have been unnecessary with 10 minutes of cleanup...

  7. Re:The reason I don't use a car radiator by zaffir · · Score: 3, Interesting

    Actually the very first 100% homemade watercooling setups used old car radiators.

    --
    "Upon attaching the waterblock to my penis, I began to notice that I know nothing about computers." -- JRockway
  8. Would a five gallon bucket been easier? by MyNameIsFred · · Score: 4, Insightful

    With the amount of coolant in the radiator, would it have been easier to use a five gallon bucket? It's not like he's really using the radiator's fins.

    1. Re:Would a five gallon bucket been easier? by jcr · · Score: 3, Funny

      Plus with an exposed water surface you get evaporative cooling for free.

      Not only that, it's a humidifier! (Handy for those winter months..)

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
  9. I'll give someone $5... by Zoc_All_Alone · · Score: 5, Funny

    I'll give someone $5 if they can do this with a VW beetle radiator :P

    1. Re:I'll give someone $5... by david.given · · Score: 4, Insightful
      Can it be the "New" Beetle? Those are liquid-cooled and have radiators.

      They're not Beetles. They're bastardised abominations from the land of marketing. They're just VW Golfs with a funky shell on top --- decent enough cars in their own way, but if you want a Golf, just buy one.

      It ain't a Beetle if it ain't rear-engine air-cooled.

  10. Water bogged. by Anonymous Coward · · Score: 3, Funny

    "Why go out and buy a water cooling system when you can do it with an old car radiator? That's exactly what One of The Twelve figured when he used the radiator from his brother's 1979 Toyota Corolla to cool his system. His Athlon64 3000+ can hit 2.5GHz smoothly now. "

    Unfortunately the brother's car no longer goes anywere.

  11. Beats using the radiator for moonshine... by billstewart · · Score: 3, Interesting
    You might be a redneck if ....
    Moonshiners occasionally used radiators to make cheap stills instead of doing the work of winding copper pipe. It was a really spectacularly bad idea, because they tended to have lead solder in them and other compounds that were really unwise to drink after they'd leached out into your distillate.

    Not sure if there's any relationship to the safety of using this for your computer cooler, though. And a 1979 Toyota seems about right for recycling by now - we just got rid of our 1985, which was still running after ~190K miles, albeit pretty roughly.

    --

    Bill Stewart
    New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
  12. D'oh by Realistic_Dragon · · Score: 3, Funny

    $420 bucks saved in return for having a junk yard in your house. Proof of concept? Cool. Pontless 'because I could'? Cool. Way to save money? Lame.

    Pretty nifty idea though... I have a Brish Leyland duce and a half truck rad around here somewhere... now that thing should be enough to keep even a P4 within normal operating temperatures.

    --
    Beep beep.
  13. nuke cool by twitter · · Score: 4, Insightful
    why not use whatever they use to cool nuclear reactor cores to cool your computer

    It's water, but it's too expensive and hot for you. It's de ionized and monitored for purity so that nothing plates out and it does not eat your cladding, that's the costly part. But, under pressure, it's hot enough to light paper on fire. That's a little too hot for your little cpu.

    I'm not a car mechanic. Duh.

    Do not, learn not. Your loss. Ask yourself what's the worst thing that can happen. If you can live with that, go for it. If not take steps to mitigate the worst. If that's not enough, then you might not do it.

    --

    Friends don't help friends install M$ junk.

  14. Nothing new. by Pirow · · Score: 4, Informative

    People have been using old car radiators for water cooling for ages, probably before the advent of commercial water cooling kits, so I don't see what the big deal is. A quick google search shows that people using car radiators for water cooling is nothing new so I'd hardly class this as news.

  15. Apple did it already by caveat · · Score: 4, Interesting

    The G5's liquid cooling system is manufactured by Delphi, a pretty well-known auto parts manufacturer.

    --

    Facts do not cease to exist because they are ignored. - Aldous Huxley
  16. Re:This sounds a little extreme by 1001010 · · Score: 3, Informative

    Porsches use aircooling, so you have to run around the block with you're PC....

  17. Re:This sounds a little extreme by Edie+O'Teditor · · Score: 3, Funny
    i have an old porche i can use for this..
    Porche? Pah - I've got a verandah!
    --
    If X is the new Y, and Y is "X is the new Y", solve for X.
  18. I was considering this... by Lisandro · · Score: 4, Interesting

    ...to cool a Class-A amp i'm building right now that dissipates 200w of pure heat continuosly. My first thought was a small motorcycle oil radiator, but that would need a small fan to help the airflow and i wanted too keep it as noiseless as possible. Car radiators are so big that the surface area is enough to cool the "modest" power requirements of electronics without aditional fans.

    Those old car radiators can be found in different sizes, and they're dirt cheap if bought as replacements for old models - or free if found lying arround as junk.

    The tricky part is to make it look good though...

  19. wife or girlfriend by rshimizu12 · · Score: 3, Funny

    The real question his how long will your wife or girlfriend put up with a car radiator in the house...????

  20. universal solution: by to_kallon · · Score: 4, Funny

    It was really difficult to attach so that not a single leak occurs.
    notice the use of duct tape in a number of the pictures...
    when it's gotta be *totally* leak proof, i choose duct tape. remember kids, there's no problem so great that duct tape can't solve it.

    --


    The only way to get rid of a temptation is to yield to it.
    -Oscar Wilde
  21. Re:what a mess by gnuman99 · · Score: 4, Funny
    I showed the pictures to my wife so that she stops complaining about the mess in my room.

    I think you meant s/wife/mom/

  22. Heater core by anethema · · Score: 3, Informative

    What most people do with home brew water cooling is take the heater core out of a car.

    The fins are generally finer and denser, and the core itself is a much more managable size.

    Then you get a beefy aquarium pump, small resevoir...and make your own waterblock with a drill press.
    The waterblock is the one part you might want to buy.

    Throw some fans on the heater core, hook it up with clear tubing (put springs inside where the tube needs to bend to avoid kinking), install, fill, add some antifreeze to avoid growth and corrosion, and up you go.

    Its really not that hard, even for a layman.

    --


    It's easier to fight for one's principles than to live up to them.
    1. Re:Heater core by Bilestoad · · Score: 3, Informative

      Five years ago you would have been right - but you're obviously not keeping up. Many mfrs now offer water cooling systems, there are even all-in-one systems from companies like Thermaltake - if you can install a conventional CPU cooler, you can install water cooling.

      When high quality reasonably priced waterblocks became available from Danger Den, Swiftech etc. it became a complete waste of time to make your own unless you're unemployed and have nothing better to do.

      Inside springs are a thing of the past (which is great, because it was hard to get the little buggers where you needed them), outside springs work very nicely - google on "coolsleeves". And if you use quality tubing, silicon or Tygon brand then they're not needed because only the most acute angles or twists will cause kinks.

      Best solution today - Innovatek, using their convection radiators that mount outside the case, no fan required, and their 12V pump that just plugs into a drive connector. Very pricey but the best always is.

  23. Aquarium by HermanAB · · Score: 3, Funny
    Why not just heat your tropical aquarium with it?

    Or even better, a hot tub? At least that may get you a girlfriend...

    --
    Oh well, what the hell...
  24. Re:The reason I don't use a car radiator by vasqzr · · Score: 5, Informative


    It'd probably be just as easy to use an automatic tranmission cooler. Much smaller and easier to use.

    Here's an example

    $50, and it'd be new, instead of have an old rusty car part in your house.

  25. What is this "overkill"? by Chas · · Score: 5, Funny

    Silly geekboy! There is no such thing as "overkill".

    There's only "kill" with greater and greater measures of assurance.

    --


    Chas - The one, the only.
    THANK GOD!!!
  26. Not New by heli0 · · Score: 3, Informative

    This is not something new. The 1986 Chevette radiator for $19 at Autozone is the most commonly used radiator for DIY water cooling on a budget.

    http://www.overclockers.com/tips1022/

    --
    Whenever the offence inspires less horror than the punishment, the rigour of penal law is obliged to give way...
    1. Re:Not New by xs650 · · Score: 3, Funny

      For $19 you could buy an entire 1986 Chevette.

      The Chevette itself is worthless, but at least you would get the shroud and fan along with the heater core.

  27. Here's an even better cooling idea. by LazloToth · · Score: 3, Funny


    Ever thought about what you could do with the forced hot water heating system in your house??? The typical 1800-square-foot house probably has, what, a dozen radiator units or so? My god, you could probably run a Z-80 at 36 Mhz with such a thing!

    --


    It's only funny until someone gets hurt. Then, it's hilarious.