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  1. #1
    6,000rpm (Max Torque) thirdson's Avatar
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    Replacing top tank on radiator

    Is this DIY'able? And is it easy to do? Also how is it done? Any sepecial tools or anything like that needed?

    Tried google but only came up with business listings

  2. #2
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    It "Can" be done but it must be with the utmost care...there is really a special set of pliers that does it best (specific radiator service tool) and even then using that it can be fucked up.

    The metal locking ring thing is only very light and can easily snap, the other thing is when you refitt you must ensure it is sealed properly which you can really only do by bunging up the radiator and sticking it in a big sqare bath while running air into it.

    SO yes a skilled DIY person can do it......But (and dont take it the wrong way when I say this) you most likely cannot.

    Shouldnt cost much for a shop to do it anyway ?? If you were down here I could get it done for you free/cheap as but your not so maybe just loiter around a radiator shop trying to make a new friend !!

  3. #3
    6,000rpm (Max Torque) efp0wa's Avatar
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    Re: Replacing top tank on radiator

    I was recently going to attempt this, looked to me as though the small tabs that hold the tank on just need to be bent out of of the way. But i may be wrong.

    I decided for the amount of time it was going to take (time that I don't have), it worked out more realistically to replace the radiator (unless it is some rare/oddball radiator).

  4. #4
    11,000rpm (Spoon B16B!!) Hayce's Avatar
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    Re: Replacing top tank on radiator

    Take it to a shop.

  5. #5
    6,000rpm (Max Torque) thirdson's Avatar
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    Re: Replacing top tank on radiator

    sweet..Thanks guys.. Was pretty scared about the closing up bit cos i was thinking quite alot of pressure builds up and dont want the thing to just pop out. Might aswell take it to the shop.

  6. #6
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    Quote Originally Posted by efp0wa View Post
    I was recently going to attempt this, looked to me as though the small tabs that hold the tank on just need to be bent out of of the way. But i may be wrong.

    I decided for the amount of time it was going to take (time that I don't have), it worked out more realistically to replace the radiator (unless it is some rare/oddball radiator).

    No you are correct....the tabs just need to be bent away without breaking them.....And in alot of cases replacing just the tank is a good way to go......But chances are it will be stuffed up (I've watched it being stuffed up with the right tool for it) Plus as mentioned you need to pressure test your work once refitted before you put it back in the car and fuck something else.

    Thirdson, you might also want to look into whats caused your top tank to fail in the first place.....If the car isnt that old ( say EK onwards) then theres a pretty good chance something else is causing pressure in your system....a leak or blockage for instance

  7. #7
    11,000rpm (Spoon B16B!!) XPLOIT's Avatar
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    Re: Replacing top tank on radiator

    Yea, take it to the shop. It's not very expensive to have done.

  8. #8
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    while they have the tank off have it flow tested......if its weak then get them to service it at same time


    I should have mentioned that before

  9. #9
    6,000rpm (Max Torque) thirdson's Avatar
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    Re: Replacing top tank on radiator

    From inspection, theres a crack on the top tank which has been sealed up before by the looks of it. The sealant has come off tho. Im thinking might be a good idea to just get an alloy radiator since the d seires hose are smaller than b series ones. But for now what quick fixes can i do to keep it from leaking as id rather spend on the alloy radiator but wanting to keep using it for around 3 ish months?

  10. #10
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    Do you like your head gasket ?

    What car is it for ?? durely a d ninja radiator wont be hard to find cheap as at pick a part or on the forum ?

    There is no temp fix.....

  11. #11
    7,000rpm (Peak Power) 4VTECN's Avatar
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    Re: Replacing top tank on radiator

    A radiator shop should be able to fix it for cheap but then you just have to compare it to the price of a new one or second hand one. I definately wouldnt do it myself unless you have the right tools etc as they have to be pressure tested or something..

    I only last week got a hole fixed in a forklift radiator which costs bugger all at $35 and they painted it black for me as well. This compared to a new price of around $600 for one was quite good..
    Yboost

  12. #12
    9,000rpm (S2000 Redline!)
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    Re: Replacing top tank on radiator

    FYI if you have pooped a radiator on stock radiator cap and a stock motor and no obvious signs of damage to the radiator id tend to look at leakdown / compression test on the motor,

    sure they can just get old and shit themselves (200,000k's +) they usually tend to crack but if its leaking around the top tank (where the tabs fold over) not an actual crack on it then definately replace and at least do a compression test on the motor.
    PROJECT EJ - D Ninja - Built not bought

  13. #13
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    Quote Originally Posted by d16a7 View Post
    FYI if you have pooped a radiator on stock radiator cap and a stock motor and no obvious signs of damage to the radiator id tend to look at leakdown / compression test on the motor,

    sure they can just get old and shit themselves (200,000k's +) they usually tend to crack but if its leaking around the top tank (where the tabs fold over) not an actual crack on it then definately replace and at least do a compression test on the motor.



    Quote Originally Posted by ME
    Thirdson, you might also want to look into whats caused your top tank to fail in the first place

    Exactly why I said it, unless the car is high KM's there is usually a reason for tanks to split......could be anything as simple as a pinhole somewhere or a faulty thermostat..right down to something more terminal such as Aaron has just described

  14. #14
    5,000rpm (VTEC Power!) torneoboy's Avatar
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    Re: Replacing top tank on radiator

    hey guys just discovered mines leaking around the top tank seal. found this thread(i used the search function,GO ME!!) and wondered if when i upgraded to a mugen radiator cap bout 20k km ago it could have caused the leak??
    from sohc to dohc in just 2.0 years,wow thats impresive hahaha

  15. #15
    11,000rpm (Spoon B16B!!) XPLOIT's Avatar
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    Re: Replacing top tank on radiator

    I noticed mine started leaking after putting the Mugen cap on too. Never clicked though

  16. #16
    5,000rpm (VTEC Power!) I B TEKN's Avatar
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    Re: Replacing top tank on radiator

    (.....unscrews mugen cap and replaces with oem one......)

  17. #17
    5,000rpm (VTEC Power!) mmmbarp's Avatar
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    Re: Replacing top tank on radiator

    Mines doing this too, just recently lol. Not driving it for a while so just gonna get a new radiator

  18. #18
    5,000rpm (VTEC Power!) torneoboy's Avatar
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    Re: Replacing top tank on radiator

    so i guess that says yes,wouldve thought itd be up to the job being a mugen 1,bummer
    from sohc to dohc in just 2.0 years,wow thats impresive hahaha

  19. #19
    3,000rpm (Grandma Drag) H22A LUDE's Avatar
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    Re: Replacing top tank on radiator

    Maybe the Mugen one is too good, increasing pressure may not be the way to roll on factory radiators. Not sure which Mugen caps everyone has, and I am sure there will be a fair few different ones, but increasing coolant pressure may not be that good of an idea. I have written of a radiator just from installing a new radiator hose (top casing snapped due to age), so more pressure will amplify small imperfections!
    1991 BB1 Prelude: H22A with boltons and Crome tune.
    1992 BB4 Prelude: Drag build underway!
    1997 BB6 Prelude: Stock as can be.

  20. #20
    19,000rpm+ Honda F1! DrRubber's Avatar
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    Re: Replacing top tank on radiator

    ^^^the hose didnt cause it you just fixed the first thing to pop....something is causing your system to pressurise.......Thats why the radiator went next.....it was the next weakest link

    As for the rad caps, its possible if they run a different pressure to the OEM they could cause probs....not hugely likely.....could all just be coinsidence.

  21. #21
    5,000rpm (VTEC Power!) torneoboy's Avatar
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    Re: Replacing top tank on radiator

    was talking to my work mate,same engine,6 months ago had to replace top tank on the radiator,completely stock so sounds like just a poorly designed radiator
    from sohc to dohc in just 2.0 years,wow thats impresive hahaha

  22. #22
    3,000rpm (Grandma Drag) H22A LUDE's Avatar
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    Re: Replacing top tank on radiator

    Quote Originally Posted by DrRubber View Post
    ^^^the hose didnt cause it you just fixed the first thing to pop....something is causing your system to pressurise.......Thats why the radiator went next.....it was the next weakest link

    As for the rad caps, its possible if they run a different pressure to the OEM they could cause probs....not hugely likely.....could all just be coinsidence.
    I wasnt going to dwell on it too much but what happened was that I was in the process of installing a water temp sensor in the upper radiator hose. When it came to refitting the radiator hose to the upper snout it cleanly snapped off the snout, leaving me with a huge hole in my radiator. From what I could see I would put it down to heat deterioration and age (Radiator was out of a 1991 4th gen with 180k). Just sourced a second hand one and fitted it rather than mucking around with the original one. So nothing to do with high pressure in my case.
    1991 BB1 Prelude: H22A with boltons and Crome tune.
    1992 BB4 Prelude: Drag build underway!
    1997 BB6 Prelude: Stock as can be.

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