300zx drift machine, bearing gone

Discussion in 'Technical' started by bubuche, May 5, 2007.

  1. bubuche

    bubuche New Member

    I took the car out on the road yesterday for a small ride.

    My engine has been fully rebuilt by myself and the help of my friend who is a mechanic.
    I've forged Eagle rods, toga performance bearing, and a second hand for a UK shop crankshaft.
    The bearing i was using were std and i did 300kms without any problems.

    Yesterday i raced a audi RS4 (I won ) but then i heard that my bearing were gone.

    I took of the oil pan today and found some small particles on the oil pan and a slightly damaged bearing.

    I haven't took of yet my main bearing but i think the particles are coming from this one.

    what can cause bearing to go?
    How to know which size of bearing i'm suppose to use?

    Thank you again for the help.
     
  2. DrewZ

    DrewZ member

    You found a worn bearing in the sump?

    Thats odd. Anyway the Service manual is your friend, sorry I couldn't be of more help.

    http://www.aus300zx.com/tech/Service-Manual.html

     
  3. Chrispy

    Chrispy Pretentious Upstart

    Some times those aftermarket bearings only come in one size, unlike the stock ones which are available in 3 different sizes. You may have had WAY to much clearance and thrown it.
     
  4. aK

    aK Banned

    did you run the engine in?

    300kms and your racing wouldnt be too good i imgaine, should be good to the engine for about 1000kms. shouldnt you :confused:

     
  5. blackheartedprofit

    blackheartedprofit New Member

    if the secondhand crank had been ground and balanced whoever you bought it off should have told you, but anyway, you probably need to remove the crank and measure it so you get the correct bearings for it
     
  6. akeizm

    akeizm New Member

    You should be able to tell if the bearings were too small for the crank when you start the car. A motor I had once when you started it made a few thumps when it 1st started then faded off. I never ran it long enough to get the oil hot, but the oil would have got hot enough the knock would have come back.
     

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