Z 2 L8ter

iTrader: (6)

I got the asp underdrive pulley from ls1speed. I just ordered the belts and I was wondering what size the crank pulley bolt it that I will need to replace and also where can i get one?

Thanks,
Jeremy

02RED Z

I'm not sure about the size but just go get one at your local GM dealer

Z 2 L8ter

iTrader: (6)

Thanks for the reply I'll have to check it out!

Dane 98 Bird

Contact your local GM dealerships, parts counter and ask for the Harmonic Balancer Bolt size, they should give you the specs.
Dane

Jammer

iTrader: (1)

I know you don't want to hear this, but of you do a search some specs are out there...don't quote me but I wanna say stock is 103mm and some folks that dont have the correct tools or motivation mentioned getting on 117mm in length. Remember to use the olde bolt and torque it to 240 ft lbs...etc..etc...follow the procedure!

Jabroni

Part number 12557840 from GM.

Z 2 L8ter

iTrader: (6)

TTT

Z 2 L8ter

iTrader: (6)

Thanks for the advice and parts#. Does anyone have or know of a good write up for the install?

SS SLP2

iTrader: (8)

REmove the small 2 in round plug on bottom of bellhouseing insert a BIg screw driver or pry bar into the teeth of fly wheel ( you will need a freind to help) may need to insert one behind the flap behind the starter also ( NO need to remove the starter) OR you may order the special tool from GM which will bolt to block which will hold the fly wheel
get a big peice of pipe to use as cheater on on ratchet or breaker bar ( some say bind bar and bump starter to loose crank bolt ( I WOULD NEVER DO THIS )
Will need a 3 leg puller that will pull from the inside ( never from outside ) of stock pulley (may rent from local past supplier )
when ready to re install I get two new crank bolts from dealer and weld a 5/8 x 4 in bolt to head of one ,
( will need to grind down the washer on stock bolt so that it will fit threw the pulley) screw the welded crank bolt in to crank slide a socket( one that will just fit inside the pulley- to use as a guide to start pulley stright ) over the welded 5/8 bolt ,use this to pull the puller back on this way you are not puting much strain on the threads inside the crank
hope this helps Johnny

try this for good info also
http://www.ebbsnflows.cz28.com/photo4.html

Jon Green

It has 3 bolt holds that you sruew a puller on and it come off with a good puller. As for replacing the asp pulley no the one I have is George Cs old pulley and I have seen it on 3 motors and spin on the start line too its tuff

Z 2 L8ter

iTrader: (6)

Ok guys I got one more prolly dumb question for ya: I plan on installing a cam in the future and since you have to take the crank pulley off, is it hard to pull the asp pulley off and where does it pull off? Can it be damaged? If so would it be better to wait prolly til next winter when I install a cam to install the pulley? I'd hate to have to buy another pulley when i decide to install the cam.

Thanks
Jeremy