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    TURBO HELP- oily explosion

    i just got my turbo build done and i go to do some half throttle-ish pulls to see how the top end felt. i had only rev'd up to maybe 4500 and it was doing great! but it threw the oil light. it was really strong and loud and not even tuned well. it fired right up on a 19lb+genIII maf miller war tune. running 8lbs of boost on my low comp stroker

    anyway as i let out of 3rd at 6k there was a ton of smoke so i pulled over to see i have oil everywhere and it was gushing from somewhere i couldnt see in the low light. there was a good size puddle on the pavement. it looks like i had excessive oil pressure but im not sure why i would?

    go to my build thread in the sig for pics...maybe something will stand out. it runs fine still btw.

    thanks for any help!



    :cockbloc:
    sigpic

    http://r3vlimited.com/board/showthread.php?t=201774

    #2
    oil pressure relief valve?

    you left the RWD valve in. the ix pump flows in reverse, and also has one built into the pump. I bet that valve doesn't like being flowed backwards.

    either that or an oil cooler line popped loose? possibly filter housing?
    Build thread

    Bimmerlabs

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      #3
      What crankcase vent are you using?
      sigpic

      Comment


        #4
        heh, yeah that's a good one. if you left it connected to the TB like stock, that wouldn't be good..
        Build thread

        Bimmerlabs

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          #5
          pressurizing the head and ultimately creating a oil pressure issue. Or it blew so much out of every orifice you became low on oil.
          sigpic

          Comment


            #6
            Originally posted by nando View Post
            oil pressure relief valve?

            you left the RWD valve in. the ix pump flows in reverse, and also has one built into the pump. I bet that valve doesn't like being flowed backwards.

            either that or an oil cooler line popped loose? possibly filter housing?
            I think i removed the rwd one because i have that big hole like you said i would. and i am leaning toward an oil cooler line too. but i still need a way to decrease oil pressure.

            Originally posted by mattdk318i View Post
            What crankcase vent are you using?
            the vent that goes from the crank up to the intake manifold? i could see how that could cause too much oil pressure.

            but i was just one place im guessing because of how epic the discharge was.

            Originally posted by nando View Post
            heh, yeah that's a good one. if you left it connected to the TB like stock, that wouldn't be good..
            please explain this a little more im not sure what vent we are talking about.


            thanks for stepping in guys.
            sigpic

            http://r3vlimited.com/board/showthread.php?t=201774

            Comment


              #7
              the rubber vent tube goes from the valve cover to the throtte body. If you left that connected to the TB, the turbo will directly pressurize the crankcase at boost pressures. bad Juju. the TB port needs to be blocked off and the crankcase vented elsewhere.
              Build thread

              Bimmerlabs

              Comment


                #8
                Had same problem as you, the solution ^^^^ and a new oil cap
                no more boosted m20, 91 318i...

                Comment


                  #9
                  :tsk:
                  Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                  www.gecoils.com
                  My euro 316 project Transaction Feedback

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                    #10
                    of course nando...i realized that after i posted. what is a good place to vent the valve cover?

                    thanks so much for the help guys! i just need to fix the leak now.
                    sigpic

                    http://r3vlimited.com/board/showthread.php?t=201774

                    Comment


                      #11
                      Originally posted by nando View Post
                      the rubber vent tube goes from the valve cover to the throtte body. If you left that connected to the TB, the turbo will directly pressurize the crankcase at boost pressures. bad Juju. the TB port needs to be blocked off and the crankcase vented elsewhere.
                      Wouldn't the drainback tube be doing the same thing times 10? It's a much larger straight tube to the crankcase......
                      Originally posted by 325Projectz
                      don't listen to the diagram... listen to mr. swiss.
                      :nice:

                      Comment


                        #12
                        Originally posted by Mr.SWISS View Post
                        Wouldn't the drainback tube be doing the same thing times 10? It's a much larger straight tube to the crankcase......
                        Do you understand how turbo's work?
                        Need parts now? Need them cheap? steve@blunttech.com
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                          #13
                          Originally posted by z31maniac View Post
                          Do you understand how turbo's work?
                          Do you know you are a doucher?
                          Originally posted by 325Projectz
                          don't listen to the diagram... listen to mr. swiss.
                          :nice:

                          Comment


                            #14
                            Originally posted by Mr.SWISS View Post
                            Wouldn't the drainback tube be doing the same thing times 10? It's a much larger straight tube to the crankcase......
                            The drain tube for the head isn't connected to the actual air intake of the engine. It simply uses the manifold as a mounting point.

                            Comment


                              #15
                              you can vent the vc to atmosphere, through a catch can, or in combination with:

                              a straight through exhaust, you could weld in a venturi system on the exhaust and just have it go out the tail pipe

                              the last place i would put it is in front of the turbo (compressor inlet). makes a mess inside the intact tract, lowers your fuel octane rating, but its effective for evacuating crankcase vapors

                              All-Red/MHW style Professional Tinted Tail lights
                              PnP EMS, fuel injectors, wideband o2 systems

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