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    Engine Bearing clearances

    Looking for some much needed help. I'm changing out my main&rod bearings in my 2003 Mazda protege. And I can't find any legitimate info on bearing clearances online anywhere.

    I went with the less accurate route and used a plastigauge.
    And here are the numbers I got for the main caps #1 being pulley side of motor.

    #1--(.0015)
    #2--(.002)
    #3--(.002)
    #4--(.0015)
    #5--(.0015)

    So I'm almost positive these numbers are incorrect. Somebody please if you have the correct specs for the 2.0 fs. Please help me out here.

    I also need the specs for the rods & the THRUST washer

    I plasigauges one rod cap an it was at(.001) not sure if that is correct either.
    Thanks for the help.

    Sent from my HTC Desire 530 using Tapatalk

    #2
    Welcome to the Forum.

    The following information comes from the Engine Workshop Manual FS.

    Crankshaft Main Journals
    First, Measure the crankshaft runout at the center journal. Maximum runout = .03 mm (.0012"). Replace the crankshaft as necessary.

    Standard Clearance = .024-.050 mm (.0010"-.0019")
    Maximum Clearance = .067 mm (.0026")

    Standard End Play = .080-.282 mm (.0032"-.011")
    Maximum End Play = .30 mm (.012")

    Connecting Rod Journals
    Standard Clearance = .024-.061 mm (.0010"-.0025")
    Maximum Clearance = .067 mm (.0026")

    Hope this helps.

    Happy Motoring!
    02 DX Millenium Red - The Penultimate Driving Machine
    MP3 Strut Tower Bar kit; Cusco Front Lower Arm Tie Bar
    MSP Springs, Struts, Stabilizer Bars, Trailing Links, #3 Engine Mount
    Kartboy Stabilizer Bar Bushings; Nyloil Shifter Bushings; Red Line MT-90 Gear Oil
    MP3 Shifter, Knob and Aluminum Pedal Set
    Suvlights HD Wiring Harness; Osram Night Breaker H4 Bulbs; Exide Edge AGM Battery
    Summer: 5Zigen FN01R-C 16 x 7" Wheels; Yoko S.drive 205/45-16s
    Winter: Enkei OR52 16 x 7" Wheels; Falken Ziex ZE-912 205/45-16s
    Modified OEM Air Intake; Racing Beat Exhaust System; Techna-Fit SS Clutch Line
    Denso SKJ16CR-L11 Extended Tip Spark Plugs; Magnecor Wires
    Power Slot Front Brake Rotors; Techna-Fit SS Brake Lines; Hawk HPS Pads
    Red Line Synthetic Engine Oil; C/S Aluminum Oil Cap
    Cyberdyne Digital Gauges: Tach; Ambient Air Temp; Voltmeter

    Comment


      #3
      Originally posted by goldstar View Post
      Welcome to the Forum.

      The following information comes from the Engine Workshop Manual FS.

      Crankshaft Main Journals
      First, Measure the crankshaft runout at the center journal. Maximum runout = .03 mm (.0012"). Replace the crankshaft as necessary.

      Standard Clearance = .024-.050 mm (.0010"-.0019")
      Maximum Clearance = .067 mm (.0026")

      Standard End Play = .080-.282 mm (.0032"-.011")
      Maximum End Play = .30 mm (.012")

      Connecting Rod Journals
      Standard Clearance = .024-.061 mm (.0010"-.0025")
      Maximum Clearance = .067 mm (.0026")

      Hope this helps.

      Happy Motoring!
      Awesome thanks alot man!

      So still kinda new at using this precise of measurements. So if you look at the measurements iv posted are they incorrect or is (.0010") the same as (.001")
      & is (.002") the same as (.0026)??

      Is so than the mains should be in spec right? or am I wrong about this?

      Because the green plastigauge I'm using only has measurements of
      (.001")-(.0015")-(.002")-(.003")
      I'm using king bearings btw not oem.

      Sent from my HTC Desire 530 using Tapatalk

      Comment


        #4
        Originally posted by slwpro View Post
        Awesome thanks alot man!

        So still kinda new at using this precise of measurements. So if you look at the measurements iv posted are they incorrect or is (.0010") the same as (.001")
        & is (.002") the same as (.0026)??

        Is so than the mains should be in spec right? or am I wrong about this?

        Because the green plastigauge I'm using only has measurements of
        (.001")-(.0015")-(.002")-(.003")
        I'm using king bearings btw not oem.

        Sent from my HTC Desire 530 using Tapatalk
        You're welcome.
        In answer to your questions, .0010" is exactly the same as .001". .002" is not the same as .0026" as it is 6/10,000 of an inch smaller - a fairly negligible difference. Look at .0026" as approximately half-way between .002" and .003".

        It appears to me that your mains are in spec and you should be good to go.

        Happy Motoring!
        02 DX Millenium Red - The Penultimate Driving Machine
        MP3 Strut Tower Bar kit; Cusco Front Lower Arm Tie Bar
        MSP Springs, Struts, Stabilizer Bars, Trailing Links, #3 Engine Mount
        Kartboy Stabilizer Bar Bushings; Nyloil Shifter Bushings; Red Line MT-90 Gear Oil
        MP3 Shifter, Knob and Aluminum Pedal Set
        Suvlights HD Wiring Harness; Osram Night Breaker H4 Bulbs; Exide Edge AGM Battery
        Summer: 5Zigen FN01R-C 16 x 7" Wheels; Yoko S.drive 205/45-16s
        Winter: Enkei OR52 16 x 7" Wheels; Falken Ziex ZE-912 205/45-16s
        Modified OEM Air Intake; Racing Beat Exhaust System; Techna-Fit SS Clutch Line
        Denso SKJ16CR-L11 Extended Tip Spark Plugs; Magnecor Wires
        Power Slot Front Brake Rotors; Techna-Fit SS Brake Lines; Hawk HPS Pads
        Red Line Synthetic Engine Oil; C/S Aluminum Oil Cap
        Cyberdyne Digital Gauges: Tach; Ambient Air Temp; Voltmeter

        Comment


          #5
          Originally posted by goldstar View Post
          You're welcome.
          In answer to your questions, .0010" is exactly the same as .001". .002" is not the same as .0026" as it is 6/10,000 of an inch smaller - a fairly negligible difference. Look at .0026" as approximately half-way between .002" and .003".

          It appears to me that your mains are in spec and you should be good to go.

          Happy Motoring!
          You sir are the man.. iv been putting off assembling the rest of my engine because I was unsure..
          Thanks again!

          Sent from my HTC Desire 530 using Tapatalk

          Comment

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