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Engine and gear break in on offroad only vehicles?

Discussion in 'The Garage' started by sled_dog, Apr 26, 2005.

  1. sled_dog

    sled_dog 1 ton status

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    How do you guys break in your motors or your gears, when you can't go on the street? We are talking rebuilds and break ins at school and I started thinking, how am I going to break in my 383???? Put on 500 miles? yeah right. I doubt I'd make it 4 times around my block with what the S10 is to become and not get pulled over. My only thought is dyno time, chock the wheels up, or build an engine break in stand. For the rear, my buddy claims his dad has done it a few times to just lift her up and run it. I could probably break in the axle on the street, but the motor just couldn't happen.
     
  2. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    For gears you drive them 10-15 miles after their first installed, then let them cool. After that you drive 500 miles or so, but be easy on them.
     
  3. JK5

    JK5 1/2 ton status GMOTM Winner

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    For breaking in a motor....
    Start-it....run it No lower than 2,000 RPM for 20-30 minutes...
    try to get the timing set close during that time.

    Time-it...then put some bias ply's on and put 500 light miles on it...
    Change oil...then run-it!!! (Sure Jack it up)

    On the gears....run them at about 35 mph...for a couple miles...let it cool....
    They should be ready...check temps and gear lube.
     
  4. sled_dog

    sled_dog 1 ton status

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    I don't particularly agree with your idea on break in. I'm a fan of break it in like you are going to run it. Light duty isn't the case. Don't want to be tagging the rev limiter but get up in the RPMs, and never sit at a constant speed for long(except for cam break in, initial 20-30 minutes at 2k). I have a roller cam so I don't believe cam break in is needed.
     
  5. PhoenixZorn

    PhoenixZorn 1/2 ton status

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    put it on a axle lift, and play with it....
     

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