jjk2509

I am installing a ASP underdrinve pulley. Is it necessary to key the pulley? Has anyone had a problem with the pulley coming off?

If you need to key, are there any sites on how to do this?

Thanks in advance for any help.

leaftye

Yeah, go ahead and key it. It's a little bit of extra insurance....albeit one that doesn't keep the bolt from coming loose.

ArKay99

I have an ASP pulley. I have had no problems with it and it's not keyed. However I am removing it to do some internal motor work and will be keying it when It goes back on. More so for the fact that it has already been stretched. It can't hurt to have it done and will keep it on the crank until you really want it to come off. I spoke to Melissa at A&A about his pinning kit and was very pleased with what I was told.

Cscokd

I am installing an ASP underdrive pulley as well and plan to pin it while I'm in there just in case I end up installing the Maggie SC. You only want to tear into it once and then only when you decide to put in a new cam.

jjk2509

Any help on how to key or pin?

leaftye

Get the kit Arkay99 mentioned. A&A is a vendor here, and Andy has a very good reputation.

Cscokd

jjk2509

Will do, thanks for the help.

Patches

Here's Sidestep (Scotty) drilling his pulley/crank to pin his pulley onto the crank using pinning tool. We did this during his ATI s/c install.



You can see the resulting hole that spans the crank snout and pulley with the 1/4" dowel that acts as the pin.



We reused his stock pulley and it has never given him any problems. However, I believe it's worth using a new pulley to keep the benefits of the virgin press fit only a new pulley can give you. Even unmolested stock pulleys can walk off. Check out the C6 archives sometime and read about the teething problems they've had.

jjk2509

Patches,

Did the pin system come from A&A and what keeps the pin from coming out?

Thanks for the help.

Patches

I believe he bought A&A's pinning kit. The flange on the crank bolt covers the end of the dowel once you torque the bolt on. We hadn't installed the bolt yet when I took that pic.

jjk2509

Thanks Patches

SideStep

Yupper, I got it from Andy at A&A.

FYI, I have an ASP pulley now and did the same process to it also... I have had the ASP pulley off for a cam change and had no issues in getting the previously drilled holes aligned...

George8211

For such a high speed rotating part, this should have come from the factory keyed or pinned. If you are doing any work that exposes access to the crank balancer (pulley).... I would say pin it !!

vetterdstr

Key it!!!

VR

SPDKLZ

SideStep,

When you pinned your pulley, did you use the old bolt to do the 240 lbs torque and back off, then go 37 lbs and the 140 degrees? I am going to pin mine and want to know how I am supposed to get it completely set in order to pin it at its max point?

Thanks,
Rodrigo

SideStep

I used the "old" bolt to pull the pulley on, by TQing to 240 ft/lbs. Next I
removed the old crank bolt and pinned the pulley/crank. THEN I installed the
new bolt....

Hope this helps...