Upgraded Radiator Options - Built In Expansion Tank

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  • Panici
    Moderator
    • Dec 2009
    • 2483

    #1

    Upgraded Radiator Options - Built In Expansion Tank

    Hey all,


    Looking to upgrade from the OEM spec M42 radiator in my car currently.
    Would like a solution with an integrated expansion tank for packaging.

    The unit I have currently is a Behr/Hella branded CR330000P. (Google tells me this has a 34mm thick core.)



    The most economical option I've found so far with a thicker core is the Cooling Solutions (with a 50mm core).
    Feature exclusive built-in expansion tank for OEM fitment ! The best choice for your sports car, in stock with express shipping.


    However it looks like shipping from driftshop is almost €200 to bring it to Canada.


    Any other options you guys can suggest that won't break the bank?


    And a note for myself later, Eastwood Radiator Black seems to be the choice if I get a polished radiator.
    Last edited by Panici; 07-21-2026, 10:25 AM.
  • Panici
    Moderator
    • Dec 2009
    • 2483

    #2
    Looks like Aliexpress has a 42mm thick one, and it comes in black too.

    Anyone tried these out?

    Comment

    • varg
      Florida Turbo Man
      • May 2014
      • 3404

      #3
      I am not aware of any drop in upgrades for the integrated tank radiators other than CATuned which is probably a relabel of what you linked here. I have doubts about how much of an upgrade that really is, the same area and under 20mm thicker. I know you shaved your engine bay, but frankly I'd go with a Z3M radiator like what is in my E30 with some external expansion tank, whether that be a repurposed E36 tank mounted to the radiator or something that fits in a stock-ish location. I used a generic aluminum expansion tank made for a mini cooper in my very space constrained turbo E34. IIRC the Z3M radiator area is about 15% larger than the OEM E30 318is radiator and it is maybe 10mm thicker.

      IG @turbovarg
      '91 318is, M20 turbo
      '94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust
      '93 RX-7 FD3S, pretty and slow

      Comment

      • TobyB
        R3V Elite
        • Oct 2011
        • 5263

        #4
        I had a lot of hassle with the integrated reservoir on E36's- it just never seemed like an upgrade...
        between leaking and splitting and delaminating, I think I went through 3 or 4 of them.

        That said, the early E39 radiator is pretty durable and has an attached right- side reservoir.
        Whether it would FIT is an entirely different question...

        no help here,
        t
        now, sometimes I just mess with people. It's more entertaining that way. george graves

        Comment

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