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I need a big favor

Discussion in 'The Garage' started by Can Can, Apr 26, 2007.

  1. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    I need some info about the minimum front rotor thickness for a 1989 V3500 before you need to replace them. I would be very grateful if someone could possibly fax me the page from a GM service manual that shows the specs.

    My fax # is 403-609-3282.

    Thanks, brothers.
     
  2. 4by4bygod

    4by4bygod 1/2 ton status

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    Paul..while I'm digging for this, I've forund a lot of websites that say the minimum rotor thickness is stamped into the rotor itself.. do you have them off the truck?
     
  3. 55Willy

    55Willy 3/4 ton status

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    I use to have 3 books at my old work that had the specs.. but i can't find specs online...way too vague.

    also this is a diesel right?
     
  4. 4by4bygod

    4by4bygod 1/2 ton status

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    I THINK it's the 454 gas truck he bought recently.
     
  5. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Most of the brakes I've messed with have the value stamped into the rotor somewhere. If 4by4bygod can't get what you need, go to the local parts house and ask 'em for a rotor and see if you can find the marking.
     
  6. 4by4bygod

    4by4bygod 1/2 ton status

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    I'd go with mikeys suggestion, I can't find crap. sorry.
     
  7. ghettosmurf

    ghettosmurf Newbie

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    1.480 (In thousandths of an inch) ;)
     
  8. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I have some brand spanking new bearing hubs/rotors sitting on the floor right beside my desk and I flipped one over to find the minimum thickness to read 1.465 also as you quote "in thousandths of an inch".
     
  9. ghettosmurf

    ghettosmurf Newbie

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    I just copy and pasted from the site i got the info from...people were saying they couldn't find anything "anywhere"

    i would imagine the sites measurements are going to have a safe barrier to prevent from over turning the rotors.

    And this was also listed for the V3500 with DUAL rear wheels...not sure if that makes a difference with singles or not. and i couldn't remember if his truck was 4wd or not,,,i thought it was though.

    EDIT, i just went back and checked, that was the minumum Brake Rotor Specs (Min Machining)

    Brake Rotor Discard At Or Under 1.465 (In thousandths of an inch) [​IMG]
     
  10. Jimbo*

    Jimbo* 1/2 ton status

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    Gm specs are as stated, but Dodge specs are 1.250". Funny thing is, they use the same caliper.
    I worry more about pad thickness than rotor thickness on D60's--If it's over 1.250" and turns true, put new pads on and run it.
    It is brakes, and they are important, but don't over-complicate it.
    Jimbo
     
  11. thedrip

    thedrip 1/2 ton status

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    my 1990 R/V/G/P factory service manual says "minimum thickness indicated on rotor".. never gives a value. Handy, huh. Has torque specs for the nut that holds the ebrake release handle on though.
     
  12. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Thanks for all the input, lads. I got what I needed!!!! :thumb:
     

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