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how to get rid of blow by!!!!

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  • how to get rid of blow by!!!!

    heres a question for everybody? how do you get rid of blow by?
    96' contour SE
    ________________________
    TEIN Lowering springs, dual exhaust,

  • #2
    Originally posted by ford zetec2 View Post
    heres a question for everybody? how do you get rid of blow by?
    you can never completely get rid of blow-by. if you have excessive amounts the only way to fix that is to rebuild the engine. you have to hone the cylinders and install new piston rings.


    Why do you ask?
    TZT Performance http://www.tztperformance.com/
    officially a troll. '93 3000GT VR4 #2229/2595

    '00 Black SVTC - sold 5/1/10
    '97 GL Turbo Zetec - gone

    Comment


    • #3
      Originally posted by striker2 View Post
      you can never completely get rid of blow-by. if you have excessive amounts the only way to fix that is to rebuild the engine. you have to hone the cylinders and install new piston rings.


      Why do you ask?
      wellmy turbo car has blow by and Im trying to bring the smoke down....
      96' contour SE
      ________________________
      TEIN Lowering springs, dual exhaust,

      Comment


      • #4
        Originally posted by ford zetec2 View Post
        wellmy turbo car has blow by and Im trying to bring the smoke down....
        how much smoke?
        TZT Performance http://www.tztperformance.com/
        officially a troll. '93 3000GT VR4 #2229/2595

        '00 Black SVTC - sold 5/1/10
        '97 GL Turbo Zetec - gone

        Comment


        • #5
          Originally posted by striker2 View Post
          how much smoke?
          I got a tube from the valve cover runinng up under the car.....and it smokes at idle a little..and when i go into boost it pours out...
          96' contour SE
          ________________________
          TEIN Lowering springs, dual exhaust,

          Comment


          • #6
            Originally posted by ford zetec2 View Post
            I got a tube from the valve cover runinng up under the car.....and it smokes at idle a little..and when i go into boost it pours out...
            i bet you dont have as much blow by as you think. im betting your pushing boost into your crankcase through the PCV system. i had to put a one way check valve between the intake manifold and the PCV valve to make sure i didnt pressurize the crankcase with boost.
            TZT Performance http://www.tztperformance.com/
            officially a troll. '93 3000GT VR4 #2229/2595

            '00 Black SVTC - sold 5/1/10
            '97 GL Turbo Zetec - gone

            Comment


            • #7
              Originally posted by striker2 View Post
              i bet you dont have as much blow by as you think. im betting your pushing boost into your crankcase through the PCV system. i had to put a one way check valve between the intake manifold and the PCV valve to make sure i didnt pressurize the crankcase with boost.

              what????
              96' contour SE
              ________________________
              TEIN Lowering springs, dual exhaust,

              Comment


              • #8
                Originally posted by ford zetec2 View Post
                what????
                no offense but you clearly have no clue how it all works.

                The PCV system vents the pressure from blow-by in the crankcase back into the intake manifold. when you pressurize the intake manifold with boost the air will go backwards through the PCV system until it reaches the crankcase. the PCV valve is supposed to prevent this BUT it does not seal nearly well enough to do so in our application.

                when you add boost to the crankcase all the pressure has to go somewhere. that happens to be out the valve cover vent (which really should go through an oil separator and back into the air intake before the turbo).



                my solution:

                i took an extra vacuum brake booster check valve (which seals completely) and installed it in the PCV system so that when under boost it would block off the crankcase.
                TZT Performance http://www.tztperformance.com/
                officially a troll. '93 3000GT VR4 #2229/2595

                '00 Black SVTC - sold 5/1/10
                '97 GL Turbo Zetec - gone

                Comment


                • #9
                  Originally posted by striker2 View Post
                  no offense but you clearly have no clue how it all works.

                  The PCV system vents the pressure from blow-by in the crankcase back into the intake manifold. when you pressurize the intake manifold with boost the air will go backwards through the PCV system until it reaches the crankcase. the PCV valve is supposed to prevent this BUT it does not seal nearly well enough to do so in our application.

                  when you add boost to the crankcase all the pressure has to go somewhere. that happens to be out the valve cover vent (which really should go through an oil separator and back into the air intake before the turbo).



                  my solution:

                  i took an extra vacuum brake booster check valve (which seals completely) and installed it in the PCV system so that when under boost it would block off the crankcase.
                  i'll try that.. but will it smoke out the tail pipe
                  96' contour SE
                  ________________________
                  TEIN Lowering springs, dual exhaust,

                  Comment


                  • #10
                    Originally posted by ford zetec2 View Post
                    i'll try that.. but will it smoke out the tail pipe
                    it should not because you are not pressurizing the crankcase anymore so there should be minimal oil/air coming from the valve cover vent back into the intake. also what ever oil is left will get burned during combustion.



                    I am curious about what turbo and how much boost you are running though (im sure you have mentioned it before)
                    TZT Performance http://www.tztperformance.com/
                    officially a troll. '93 3000GT VR4 #2229/2595

                    '00 Black SVTC - sold 5/1/10
                    '97 GL Turbo Zetec - gone

                    Comment


                    • #11
                      Originally posted by striker2 View Post
                      it should not because you are not pressurizing the crankcase anymore so there should be minimal oil/air coming from the valve cover vent back into the intake. also what ever oil is left will get burned during combustion.



                      I am curious about what turbo and how much boost you are running though (im sure you have mentioned it before)

                      well heres my number.... i got to go to a turbo meeting...call me some as you get this post....615-589-9258
                      96' contour SE
                      ________________________
                      TEIN Lowering springs, dual exhaust,

                      Comment


                      • #12
                        kid at my school has a 04 civic si turbo and when backing up (slight rpm) its like a blue smoke machine, he gunned it in front on me one time and i swear i counldnt see anything.
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