please help with crank pinning
Thread Starter
Pro
Joined: Jan 2006
Posts: 603
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From: Yuma AZ
please help with crank pinning
i have a paxton sc600 kit im putting in. i got the balancer bolt off but need detailed instructions on how to pin the crank. i have the pin and drill bit but dont know where to drill the hole. also why am i doing this? after the hole is drilled i just slip the pin in there and tighten the bolt down? someone please help i cant find instructions anywhere. thanks
casey
casey
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
i have a paxton sc600 kit im putting in. i got the balancer bolt off but need detailed instructions on how to pin the crank. i have the pin and drill bit but dont know where to drill the hole. also why am i doing this? after the hole is drilled i just slip the pin in there and tighten the bolt down? someone please help i cant find instructions anywhere. thanks
casey
casey
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
The crank pulley is pressed on and not keyed so likely to spin loose in high-torque applications like supercharging an LS1. To prevent this, a method was devised to simulate a keyed pulley/shaft setup by drilling a hole that spans across the crank snout and pulley and inserting a dowel pin to lock the two together.
Here's a pinning tool with a drill bushing in the collar to guide the drill bit.This is screwed into the crank after the pulley is installed.
Here you can see the dowel pin after insertion.It's at `12 o'clock on the pulley hub/crank interface. The crank bolt is then inserted and torqued in place.
Here's a pinning tool with a drill bushing in the collar to guide the drill bit.This is screwed into the crank after the pulley is installed.
Here you can see the dowel pin after insertion.It's at `12 o'clock on the pulley hub/crank interface. The crank bolt is then inserted and torqued in place.
Team Owner
Joined: May 2005
Posts: 23,682
Likes: 9
From: Flagstaff Az.
The crank pulley is pressed on and not keyed so likely to spin loose in high-torque applications like supercharging an LS1. To prevent this, a method was devised to simulate a keyed pulley/shaft setup by drilling a hole that spans across the crank snout and pulley and inserting a dowel pin to lock the two together.
Here's a pinning tool with a drill bushing in the collar to guide the drill bit.This is screwed into the crank after the pulley is installed.
Here you can see the dowel pin after insertion.It's at `12 o'clock on the pulley hub/crank interface. The crank bolt is then inserted and torqued in place.
Here's a pinning tool with a drill bushing in the collar to guide the drill bit.This is screwed into the crank after the pulley is installed.
Here you can see the dowel pin after insertion.It's at `12 o'clock on the pulley hub/crank interface. The crank bolt is then inserted and torqued in place.
