24v cooling issues, possible thermostat???

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  • BAVARIAN IRON
    E30 Modder
    • Feb 2010
    • 979
    #1

    24v cooling issues, possible thermostat???

    I got my car up and running after two years, After starting to drive it started to creep towards red. After I came back it was still at red, My m42 overfill tank has coolant to the top and highly pressurized, but oddly enough the coolant was cool to the touch and the hoses we're hot as shit and seemed empty of fluid.

    I'm thinking the thermostat is stuck closed but it just seems weird that both the thermostat and water pump are new. probably a few thousand miles on them...

    what do you guys think?
    Tags: None
    • spiDmang
      No R3VLimiter
      • Nov 2010
      • 3941
      #2
      Possible air lock in the system. Are you getting hot air in the cabin? Try bleeding the system some more
      -Brad, AlphaTeam Motorwerks, LLC
      91' 318iS - S54/6MT Swapped
      08' E90 M3 6MT - Daily
      04' Chevy Duramax CCLB - Work Truck/Hauler


      Originally posted by IronJoe
      Alpha Team: running through e30s, gringo icebergs, and 19 yr olds.

      Originally posted by 2mAn
      Brads a standup guy even though he likes buttsex

        Comment

        • M3PO
          E30 Addict
          • May 2012
          • 537
          #3
          I would suspect the gauge. Mine did the same thing randomly a few times and I installed an aftermarket gauge that showed normal temps.

            Comment

            • Mwishlist
              E30 Addict
              • Jul 2013
              • 505
              #4
              Good call on the heat. Is your heater blowing hot air? Mine was airlocked or whatever you call it, when I first got it going after the swap. No heat and it would creep steadily past the halfway mark.

              Following a bunch of threads I took the top radiator hose off and filled the engine up that way, as opposed to filling it up via the overflow; and it worked like a charm. Not sure how or if that works with the M42 radiator.
              Thank god, R3V was getting boring since the ginger kid wrecked his car. - Stonea

                Comment

                • f4tj0n
                  E30 Addict
                  • May 2013
                  • 411
                  #5
                  Before I did my swap, I had overheating problems. As soon as I would idle anywhere for an extended period of time, my temps would rise. After I did my swap, I had the same issue, I always had thought that I just couldn't get an air bubble out or something, but I ended up popping a hole in my radiator when I installed my skidplate so I replaced it with a new Nissen unit, and now my temps stay right below the half mark, approx. 190-195 on my aftermarket gauge.

                  So.. my original radiator had to have been clogged or something is my assumption. lol

                    Comment

                    • CENTURION
                      Grease Monkey
                      • May 2015
                      • 372
                      #6
                      replace your tstat right away, a flush would be great as well.
                      then bleed that sucker.
                      heat on full blast while doing so. good luck

                        Comment

                        • bimmer630
                          E30 Fanatic
                          • Mar 2009
                          • 1228
                          #7
                          I had to drill a small hole in the top of my T-stat because my swap was doing funky things... the temp would randomly climb up and down.. I couldnt get it bled out. I tried lifting the front of the car up really high, removing the bleed hose that goes back to the rad tank.. none of it worked. I have a late model body with the newer style cooling system, there is no bleed screw.. (i think the m42 rads have one on the exp tank?)

                          anyway the bleed hole in the t stat is a good idea anyway

                            Comment

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