Coolant at throttle body leak

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  • HugoMonster
    Noobie
    • Jun 2006
    • 29
    #1

    Coolant at throttle body leak

    Hi guys,
    I have a '92 325 Cab with an M20 & auto tranny, Yesterday, when i started her up in the morning, I noticed a faint odor of coolant, so after opening the hood, I saw that the coolant was leaking out from the throttle body area.
    apparently, it is coming out from the sealant of the housing ? ( correct me if im wrong )( the part where the 3 hoses connect to ) that connects to the throttle body itself.
    I read somewhere that it was possible to bypass the coolant to the throttle body, is this actually do-able? If so can anyone help explain how to do this? I know its now good for cars in colder climates, but since I am in Houston...i really dont care.
    Thanks in advance guys!
    Last edited by HugoMonster; 03-08-2009, 07:10 AM.
    Tags: None
    • Rolla1990
      Advanced Member
      • Dec 2007
      • 199
      #2
      Take the two coolant hoses that go to the throttle body and connect them to each other.


      Turbo M20, MSnS, 38lb, 3" no cat, RPI 12.2", ATS DTC, 240whp/240wtq, Lmnop. www.DonsGarage.net

        Comment

        • Aptyp
          R3V OG
          • Feb 2008
          • 6584
          #3
          ^+1 Best solution EVER.

            Comment

            • HugoMonster
              Noobie
              • Jun 2006
              • 29
              #4
              Crap...correction, there are 3(three) hoses that go into the throttle housing...
              Last edited by HugoMonster; 03-08-2009, 07:11 AM.

                Comment

                • SpecM
                  R3V Elite
                  • Oct 2005
                  • 4531
                  #5
                  Originally posted by HugoMonster
                  Crap...correction, there are 3(three) hoses that go into the throttle housing...
                  yea, one is the PCV tube. Leave that one alone (the big one)
                  1989 cirrisblau-metallic 325i

                    Comment

                    • HugoMonster
                      Noobie
                      • Jun 2006
                      • 29
                      #6
                      awesome! thank you all for the help & info!!!:D

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                        • monty
                          Mod Crazy
                          • Feb 2007
                          • 665
                          #7
                          If BMW built the set up to have collant flow through it wouldnt this be something to leave alone? Not trying to be a dick or anything just wanting to know if there is a purpose of doing this other than to fix a leak.
                          sigpic

                            Comment

                            • Rolla1990
                              Advanced Member
                              • Dec 2007
                              • 199
                              #8
                              I'm not sure, but I think BMW put that coolant jacket there to help prevent the throttle blade from icing up. For a car in a warm climate, or a summer only car it should be no problem to bypass the throttle body.


                              Turbo M20, MSnS, 38lb, 3" no cat, RPI 12.2", ATS DTC, 240whp/240wtq, Lmnop. www.DonsGarage.net

                                Comment

                                • JasonC
                                  Site Manager
                                  • Aug 2006
                                  • 14451
                                  #9
                                  Originally posted by monty
                                  If BMW built the set up to have collant flow through it wouldnt this be something to leave alone? Not trying to be a dick or anything just wanting to know if there is a purpose of doing this other than to fix a leak.
                                  Alot of car companys put coolant to the throttle body. And it's a very popular thing to delete. Like stated above, it's for cold weather so the throttle won't freeze up.

                                  1992 BMW 325iC
                                  1978 Chevrolet Monte Carlo
                                  1965 Chevrolet Corvair Monza 140hp

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                                    • Knockenwelle
                                      Grease Monkey
                                      • Jul 2008
                                      • 395
                                      #10
                                      ...and cold in this case means HOLYSHITWE'REINTHEARCTICIT'SFUCKINGCCOOOLLLDDD!!!!

                                      You really don't need it. An M20 will not want to start in weather cold enough to present a throttle icing possibility.

                                      Unless you've done a CAI that works...
                                      sigpic

                                      Mike

                                      '91 325i track car. Mostly...

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