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bump in road.. found out it is motor mounts...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bigblue, Feb 13, 2001.

  1. bigblue

    bigblue 1/2 ton status

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    when i gas over big bump I get a big 'CLANK' by my gas petal on my floorboard. it doesn't sound good.
    what could it be?

    I must of broken my engine mount when i went off roading last weekend. It looks like it is the left motor mount. when i apply gas with my brakes on, my engine rotates toward the right and literally lifts up like 6 inches. if i hit a bump in the road it must be shaking around in there...
    how dificult of a job is it to replace one of those bastards and if i am at it i might as well replace the right and tranny mount too?
    baja surf nazi<P ID="edit"><FONT SIZE=-1>Edited by bigblue on 02/14/01 02:50 PM (server time).</FONT></P>
     
  2. 90K5

    90K5 1/2 ton status

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    Re: when i gas over big bump

    Do you have a lift? If not, I would guess it is the leaf springs bottoming out on the bumpstops...a good excuse to get a lift...

    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>
     
  3. bigblue

    bigblue 1/2 ton status

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    Re: when i gas over big bump

    no i have a 6 inch national spring lift. I don't know i felt it a little when i went wheelin this past weekend. it is like someone hitting a hammer right under my feet. it happens when the springs compress. going over bumbs in the road but only big ones. weird?

    baja surf nazi
     
  4. Re: when i gas over big bump

    it could be the sheet metal in your floor board flexing and popping at the bodymount. Mine does that sometimes.
     
  5. bigblue

    bigblue 1/2 ton status

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    Re: when i gas over big bump

    I hope that is all. I am going to investigate it further and check underneath as soon as i get off of work.

    baja surf nazi
     
  6. Gandolf

    Gandolf 1/2 ton status

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    Re: when i gas over a big bump

    Check your engine, transmission and transfer case mounts. You could have a broken one.

    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     
  7. Sparky

    Sparky 1/2 ton status

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    Re: when i gas over a big bump

    All that happens when i hit the gas over a bump is alot of tire spinning and a sore neck!

    Sparky

    When all else fails... Check the blinker fluid.
    78 K-5
     
  8. bigblue

    bigblue 1/2 ton status

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    Re: when i gas over a big bump

    OK so it might be a transmission, t-case, engine mount. how hard to replace those? thanks

    baja surf nazi
     
  9. bigblue

    bigblue 1/2 ton status

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    Re: when i gas over a big bump

    I posted my question up top thanks


    baja surf nazi
     
  10. californiak5

    californiak5 1/2 ton status

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    Re: when i gas over a big bump

    As long as you have access to a cherry picker it is really not a problem to change out the mounts. I have heard the energy suspension makes great polly mounts for the motor and the trans. And you are right, you might as well change them all if they are the stockers in the truck.

    See Ya,
    Keith

    [​IMG] Born to Drive My K5 [​IMG]
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: when i gas over a big bump

    You could also use a good size block of would and a jack from underneath. I would be more comfortable with my hands in there with a cherry picker though.

    Rene

    [​IMG]
     

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