newschool72

iTrader: (12)

hey guys, i have a question about my LS3 crate engine. i got it all set up in a 72 camaro w comp cam LSR 269, got it running and while looking things over while it was idling, i noticed the crank pulley wabbles noticably. when i did the cam swap i used a new torque to yeld bolt and torqued it to spec. i cant remember the exact # , but it was something like 50 ft lbs +270 degrees. is this something to worry about and has anyone else noticed this? thanks

jetaws6

iTrader: (3)

Its definitely something to worry about. I wouldnt drive the car till its fixed. I dont know what would cause it though but I think 50 foot lbs is way to low for that to be torqued. Fbody torque spec I think is 240 ft lbs

newschool72

iTrader: (12)

the torque spec was 50 ft lbs + 270 degrees of bolt rotation. that makes it around 240 ft lbs. i figured it out anyway. the rubber isolator on the dampner is out of alinment. i think i can just pry it back square. thanks

LSWNDR

Mine did the same thing man you need to notch the the crank for a key way on the balancer because they factory cranks done come with them mine did it twice after torque from hell so thats what i did an now its trying to throw the belt because of a weak tensioner so i ordered the comp cams one with idoler pulley n now its fine so it's all good! My callies cranks was notched when i ordered my 408 from LME but the slp balancer wasn't so i ordered a new PowerBond balancer and they are super nice piece for a good price well worth the money.

litle88

iTrader: (20)

Don't forget the LOCTITE.

S10xGN

iTrader: (11)

Ya think? I certainly wouldn't run it, that damper's trashed!

HMERacing

I wouldn't!!! Just a guess... Did ya use a 3 jaw puller on the outer edge of the dampner? It will destroy your pulley/dampner, a bad pulley/dampner WILL destroy your motor. They make a specific puller for that purpose. GL

newschool72

iTrader: (12)

anybody got an idea of the best place to buy a new dampner? my budget on this project is running out fast!! i would be afraid to buy used for fear that dampner would have been pulled with a 3 jaw as well. its an ls3 type.

scatillac

iTrader: (12)

ATI. There's an application guide on their site that's pretty comprehensive.

newschool72

iTrader: (12)

i just ordered a factory dampner from a dealer. 125 buck with a new bolt shipped. thought about an underdrive unit but my setup is going to make all the power i need for my app.