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M30 Guys: Coolant expansion tank details needed

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    #31
    My 16" pusher is centered right on the AC condenser. Puller is in the only place it will fit

    IMG_0193 by Darin Schnoor, on Flickr

    IMG_0192 by Darin Schnoor, on Flickr

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      #32
      Which radiator are you running Corvalis? Looks thicker than my e28 one, but might just be the angle of the photo (or brand, I have a Behr).

      I've been toying with the idea of running an e60 radiator - it's bigger with thinner aluminium end tanks. The end tanks would allow the core to move further forward for more room in front of the engine.

      Would need mods to the end tanks to clear the chassis rails though (or a notched frame, which seems a bit overkill for radiator clearance)!

      https://www.fcpeuro.com/products/bmw...hr-17117519209
      My e30: OEM+ with M30B35

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        #33
        IIRC I have an e28 535i radiator, not sure what brand though.

        I like the idea of a radiator with aluminum end tanks, that E60 one looks interesting.

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          #34
          I used to have alot of cooling issues with my swap: overheating in traffic, fan not kicking on at the appropriate temperature, etc.

          I replaced the thermostat (including drilling a hole), the water pump, the radiator temp switch (80/88 C), and the sensor that plugs into the thermostat housing.

          Now, the temperature gauge is pinned at just over 1/4 whenever I'm at speed. If I'm idling in traffic for a while, the 16" SPAL fan will kick on like clockwork at just under 1/2 and the temp gauge never strays over halfway.

          Not sure what did it: the new parts, opening everything up and getting a real good proper bleed, or just dumb luck. All I know is that solved my issues, so if you continue to struggle maybe think about replacing a few of those things

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            #35
            This may or may not help but i feel that it probably will.

            just messing around in the garage
            instead of the fan drawing from all around it basically the engine bay / radiator air.
            do something like this to get it to draw mostly from out the grill.

            just doing this side i can feel much more sucking power on that side.

            in my car when it's basically under 80f the car will do fine
            but will over heat in traffic once everything is blazing hot
            including the intercooler, but if it draws from the outside idk.
            Especially with that little 8amp fan.
            no intercooler you can get a big ass monster shouldn't overheat.

            Fan funnel by jet jones, on Flickr
            Maybe out of abs by jet jones, on Flickr
            Last edited by LowR3V'in; 06-15-2019, 02:24 PM.

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              #36
              ^^ Great points.

              I forgot to mention that I also added a fan shroud in between my front core support and the radiator. Prior to doing that, you could feel the air from the pusher fan shooting straight up into the atmosphere when you opened the hood. Clearly it was not operating very efficiently.

              Now, the cooling air is contained and pushed straight onto the radiator. I have to imagine this is helping quite a bit compared to the previous setup.

              I used this radiator support bracket and modified it with a dremel to fit the M535i radiator. It fills the gap perfectly on mine (see photo)

              https://imgur.com/7Mv6wAZ

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                #37
                Originally posted by dishwab View Post
                I used to have alot of cooling issues with my swap: overheating in traffic, fan not kicking on at the appropriate temperature, etc.

                I replaced the thermostat (including drilling a hole), the water pump, the radiator temp switch (80/88 C), and the sensor that plugs into the thermostat housing.

                Now, the temperature gauge is pinned at just over 1/4 whenever I'm at speed. If I'm idling in traffic for a while, the 16" SPAL fan will kick on like clockwork at just under 1/2 and the temp gauge never strays over halfway.

                Not sure what did it: the new parts, opening everything up and getting a real good proper bleed, or just dumb luck. All I know is that solved my issues, so if you continue to struggle maybe think about replacing a few of those things
                Sometimes it's dumb luck, sometimes it's bad parts, sometimes it's a complete fuckin' mystery! I've replaced all those parts and it never solved the issue, though I'm happy to say that after a couple cruises with the raised expansion tank I have yet to see any more air from the bleed screw and the fans seem to (finally) be reliable! I ordered a PWM setup though which I'll install after teh Picnic, as I really don't like the massive amperage spikes that come from the stock relay setup.

                Originally posted by LowR3V'in View Post
                This may or may not help but i feel that it probably will.

                just messing around in the garage
                instead of the fan drawing from all around it basically the engine bay / radiator air.
                do something like this to get it to draw mostly from out the grill.

                just doing this side i can feel much more sucking power on that side.

                in my car when it's basically under 80f the car will do fine
                but will over heat in traffic once everything is blazing hot
                including the intercooler, but if it draws from the outside idk.
                Especially with that little 8amp fan.
                no intercooler you can get a big ass monster shouldn't overheat.
                Ah, like an inlet gasket versus an exhaust gasket. I've got the Spal fan gasket on the exhaust (between the fan and radiator) but I suppose a custom fab'd one on the inlet side would be beneficial as well.

                Originally posted by dishwab View Post
                ^^ Great points.

                I forgot to mention that I also added a fan shroud in between my front core support and the radiator. Prior to doing that, you could feel the air from the pusher fan shooting straight up into the atmosphere when you opened the hood. Clearly it was not operating very efficiently.

                Now, the cooling air is contained and pushed straight onto the radiator. I have to imagine this is helping quite a bit compared to the previous setup.

                I used this radiator support bracket and modified it with a dremel to fit the M535i radiator. It fills the gap perfectly on mine (see photo)

                https://imgur.com/7Mv6wAZ
                Yes a gasket around the fan exhaust is really helpful. Definitely worth the $15 or whatever Spal charges for them.

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                  #38
                  ever get this figured out?

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