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New Engine Break In

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by johnny reb, Jan 10, 2001.

  1. johnny reb

    johnny reb 1/2 ton status

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    Location:
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    Just put in my new GM 350 crate engine last weekend. Drove it lightly on Saturday, maybe 25 miles. Then on Sunday I had to drive to DC from Pittsburgh (250 miles). I stayed between 55-65 mph the whole trip and stopped occasionally to make sure that everything was ok. Pace Parts says to change the oil after 500 miles, which I will do tomorrow. Then they say that the engine is ready for normal use. On Friday, I will be driving back to Pittsburgh. Am I putting too much of a strain on the new engine in such a short time? Is it ok to be driving for 4-5 hours straight without doing any damage?
     
  2. MudFrog

    MudFrog 1/2 ton status

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    I think they refer more to gunning the engine and reving it high rather than taking an extended trip.

    89 K5 Silverado
    <A target="_blank" HREF=http://mudfrog.coloradok5.com>http://mudfrog.coloradok5.com</A>
     
  3. 90K5

    90K5 1/2 ton status

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    I would think the extended trips would be good for it.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  4. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    There's a whole "procedure" for breaking it in. I don't know the exact numbers but to be super safe, fire it up and take it out and gun it for a while. Change the oil and drive it for 500 being careful not to beat on it or driving at the same speed for extended periods. Change the oil after the 500 and you're ready to go [​IMG]

    (Please direct all hate mail to "Blazer_Boy" because I don't think "BlazerBoy" would appreciate it [​IMG])
     

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