JimMueller

iTrader: (9)

I bought a used block which had a ATI ProCharger installed on it earlier in it's life. I wasn't aware of this until we attempted to torque down my new crank bolt.

I haven't seen it first hand, but the installer is indicating to me that the stock bolt basically slides into the snout. Almost like a larger diameter bolt was used previously. The original owner says he had to wait a long time it get the special crank bolt from ATI. The installer is skeptical on the reason that the bolt is needed. He thinks it may have been stripped and the longer bolt was needed to get access to additional threads.

So what's the scoop on this? Why the need for the ATI bolt? Would my symptoms be expected after using the ATI bolt in the block? Can I re-use the original ATI bolt? What do I need to get this friggin' pulley back on safely?

This is my daily driver which has been down for 4 weeks, and this is really getting to be a hassle!

Blackbird

sounds bad. the bolt that comes with the blower is just longer. not bigger in diameter.

sounds like the previous guy chewed up the crank snout and re-tapped it.

BIGBOS

Yea, thats not good......can they tap the crank inside the motor, I was reading somewhere else that it needs to be pulled out if you mess up the threads......

The ATI bolt is longer, and now I'm finding out that they are good for one torquing shot......

Black LS1 T/A

The ATI bolt is needed only to account for the extra length needed by adding the crank pulley. They provide spacers (washers) so you can customize for the ineveitable differences between vheicles' needs.

The bolt is no bigger.