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Thread: Crank Pulley

  1. #1
    Join Date
    Sep 2005
    Location
    Austin Tx.
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    13,138

    Crank Pulley

    Can anyone tell me a pretty good step by step of how to install one. I know to heat it up and slide it on, but I wanna make sure I dont f*ck nothing up in doing that. Any suggestions would help out.

    Thanks,
    david
    1951 3100
    1984 C10

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Honestly, I haven't found a GM manual yet that says to heat or warm one up. I use a piece of all thread that is cut off longer than a factory bolt and draw it on with a ratchet. That's just me. I run a piece of small chain through the balancer to hold it still since I don't have a fancy tool to do that. Then again, I have found a GM manual yet that says to use a piece of chain or holder to keep the crank from turning.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Aug 2005
    Location
    St. Anthony, Indiana
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    1,592
    Allen taps them on with a hammer far enough to be able to use the old bolt, then use an impact and pull it in.

  4. #4
    Join Date
    Sep 2005
    Location
    Austin Tx.
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    13,138
    Im just worried if i try and tap it on with a hammer I will fracture the edging of it. This last pulley I had on there had a small fracture on the edge thats why im gonna replace it. Should I put a small piece of wood in between and then tap or use a rubber mallet?
    1951 3100
    1984 C10

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    take a socket or pipe and tap on the center, not on the pulley edges. BTW, the pulley has a rubber isolator and hitting on the outside of it could fracture the bond.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Sep 2005
    Location
    Austin Tx.
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    I never thought of hitting the middle of it. I think ill try that. Jeff Smallen was the one that was telling me to heat up the snout of the pulley and he said it just slides right on, after its butted up all the way. Then once it cools its set on their..
    1951 3100
    1984 C10

  7. #7
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Yeah, warm it up a little but dont cook it. I know it works, I've tried it. It is so easy with heat. I'm just saying that the GM books never suggested the easiest install method. Use propane, not oxy/acetylene.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  8. #8
    Join Date
    Apr 2003
    Location
    Mansfield, Texas, USA
    Posts
    2,462

    Thumbs up

    I just lubed my crank snout w/ some 30W, got it on as far as it'd go... then used some threaded rod to get it down.

    37ft-lbs, then 140° CW.
    The superior man is modest in his speech, but exceeds in his actions. - Confucius

    "He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel

    '01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
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  9. #9
    Join Date
    Mar 2003
    Location
    San Marcos Texas
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    4,393
    I was amazed at how little heat it took to make it fit. Smear a little grease on the hub, when it just starts to melt install it.
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  10. #10
    Join Date
    Apr 2005
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    4,229
    I put it in the oven. Not sure that was the best method either, but it worked.
    Gone, but not forgotten!

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