Peterbilt hood hitting cowl

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Chevyho, Mar 8, 2018.

  1. Chevyho

    Chevyho Medium Load Member

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    I have a bang/ rattle over washboard bumps, obviously some is normal but this isnt a normal sound. Anyways im pretty sure its my hood hitting the cowl, as there are indents on hood from the rivets on cowl. And some scuffing of paint where it hits. Only does it on drivers side, what could be the cause of this?
     

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  3. AModelCat

    AModelCat Road Train Member

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    I would say you probably need to adjust the hood stops.
     
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  4. Chevyho

    Chevyho Medium Load Member

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    Its a 389 pete by the way
     
  5. Chevyho

    Chevyho Medium Load Member

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    K, thats where ill start. I was thinking of replacing the rubber blocks and adjusting as the hood strap feels looser on the drivers side as well.
     
  6. d281833

    d281833 Heavy Load Member

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    Depending on the year it's probably a combination of both.
     
  7. Chevyho

    Chevyho Medium Load Member

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    09, both blocks and adjustment you mean?
     
  8. boneebone

    boneebone Road Train Member

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    The cab mount bushings could be worn out causing excessive movement and misalignment of your cab, which in turn is causing your hood to rub on the cowl.
     
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  9. Chevyho

    Chevyho Medium Load Member

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    I think ill do those too, as they do looked dry and cracked. Prob a good idea to replace all associated bushings before making stop adjustments anways
     
  10. AModelCat

    AModelCat Road Train Member

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    Not sure about Peterbilt but KW recommended adjusting the cone-shaped rubber blocks down low on the firewall to hold the weight of the hood. The blocks up top were simply meant to prevent the hood from contacting the cowl when the frame flexed on extremely uneven terrain. The top blocks aren't meant to be in constant contact with the hood as they'll chew up the hood pretty quick. Like I said that was what KW told us 15 years ago and Pete's may be different.
     
  11. Chevyho

    Chevyho Medium Load Member

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    Yah petes dont use those lower cones. Hood rests on top blocks all the time
     
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