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Thread: Radiator leak

                  
   
  1. #1
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    Question Radiator leak

    Got a 2002 530i that developed a hair line crack at top of radiator 2 inches in front of outlet hose. Wondering what type of material it is,(plastic, poly type stuff or what ?) Will epoxy fix ? If so, what type ?

  2. #2
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    The only effective fix is a new radiator. You can try patching it (it's crap plastic), but at best, you'll only be able to delay a more catastrophic failure. If the radiator has cracked, you're due for a full cooling system overhaul.
    2006 GMC Sierra 2500HD 4WD Duramax LBZ/Allison 6-speed
    2002 BMW M3 - Alpinweiss III/Black
    1999 323i KP/GTS2 - Alpinweiss III (Black Hood, other stuff)
    1990 325is - Brilliantrot/Tan
    1989 325is - Alpinweiss II/Black (S50B32)
    1989 M3 - Alpinweiss II/Black (S62B50 in progress)



  3. #3
    Senior Member JC5's Avatar
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    x2
    Supercharged '03 530
    Thinking about tracking down an e28 535is

  4. #4
    x3
    Don't make the mistake I did last year and only replace the single malfunctioning cooling system part - the rest of them aren't too far behind in failing, leaving you stranded, or worse. Replace the entire coolant system (radiator, expansion tank, hoses, thermostat, and pump) at the same time. Just my $0.02.
    2000 323i
    1997 M3

    it was a beautiful day... the sun beat down
    I had the radio on, I was drivin'...

  5. #5
    Member MPWR's Avatar
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    x4
    If you have cracking plastic, time to replace it all with new. The cooling system is now a time bomb in the process of exploding. Do not let the engine overheat- if you do, more than likely the head will be destroyed.

    A cooling system overhaul is a very reasonable DIY type task.
    Andy Miller
    1995 Avusblau M3
    1997 Alaskablau 318ti M Sport

  6. #6
    x5

    Cooling system explosions are fun (not really).

    If you have the money, put a stewart water pump in there. There's a reason they come with a lifetime warranty.

  7. #7
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    Quote Originally Posted by MPWR View Post
    x4
    If you have cracking plastic, time to replace it all with new. The cooling system is now a time bomb in the process of exploding. Do not let the engine overheat- if you do, more than likely the head will be destroyed.

    A cooling system overhaul is a very reasonable DIY type task.
    Actually, if you warp the head, you'll almost certainly destroy the block too. Aluminum block cars do NOT like getting overheated - the head rips the threads out of the block and the cost of repairing that in order to *hope* that it holds together is too high to justify.
    2006 GMC Sierra 2500HD 4WD Duramax LBZ/Allison 6-speed
    2002 BMW M3 - Alpinweiss III/Black
    1999 323i KP/GTS2 - Alpinweiss III (Black Hood, other stuff)
    1990 325is - Brilliantrot/Tan
    1989 325is - Alpinweiss II/Black (S50B32)
    1989 M3 - Alpinweiss II/Black (S62B50 in progress)



  8. #8
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    I took the member advice a couple of weeks ago and replaced the entire cooling system. I put a metal impeller pump in; funny but the car seems to run better. Mystery ! Thanks to all for the advice. See Ya.

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