BE3 Gearbox Input Shaft Runout/Straightness
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  1. #1
    Fellow Frogger! aquinian's Avatar
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    Default BE3 Gearbox Input Shaft Runout/Straightness

    Hi All,

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    The input shaft I was planning on using in a gearbox rebuild has a runout of 2 thou - is that ok or is it too bent?

    Regards,
    Michael
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

  2. #2
    1000+ Posts Wildebeest's Avatar
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    Michael,
    Interested in how you've arrived at the .002" run-out of the input shaft. Consider that until the nose of the shaft is steadied in the flywheel spigot bush/bearing there would be some run-out.
    Have you supported the input shaft with a V block close to the front box bearing. Or a lathe type centre on the nose of the shaft?
    Regardless I wouldn't consider that figure to be excessive.

  3. #3
    Fellow Frogger!
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    There is no bearing in the end of the crank.

    Have you checked the preload. If the bearing isn't loaded correctly it will have movement. Grab the shaft and wobble it. If it moves side to side there is not enough preload
    Adrian Wuillemin

  4. #4
    Fellow Frogger! aquinian's Avatar
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    It has no preload at the moment, it was measured out of the box.

    I'll give it a wobble when I get it in. Thanks for the advice.

    Wildebeeste, I'll let you know how it was tested when I find out myself. A hydraulic technician did it for me, they check cylinder rods for straightness. I got him to check it because I was worried I might have bent it by trying to press a bearing off - I gripped it between the first and second gears stuck on the shaft.



    Regards,
    Michael
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

  5. #5
    Fellow Frogger! aquinian's Avatar
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    I see where the confusion is, my fault. I shouldn't have said runout, it is just a straightness question.
    Current: 406 Coupe, 504 Sedan

    Previous: 306XSi, 205GTi, 206Gti, 505 V6, 505 Wagon, 504 Sedan, 504 Wagon, 306Gti6, 306XT, 205Si, Citroen XM, Citroen Xantia

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