to pin crank or not
Thread Starter
Racer
Joined: Sep 2011
Posts: 312
Likes: 0
to pin crank or not
my harmonic balancer recently started walking off the crank so I'm going to replace the pully with an underdrive unit and ARP bolt. is crank pinning very important for non forced induction.
Instructor
Joined: Jun 2006
Posts: 107
Likes: 0
From: Siloam Springs AR
You wouldn't want to go back in there and take it apart again if it did become a problem. Its quite a bit of work to get in that far. Just one more thing you can cross off the list of things coming back to haunt you later.
Team Owner
Joined: May 2001
Posts: 87,356
Likes: 1,592
From: Western NY
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Plus, it's not expensive. Do it. 
Burning Brakes
Joined: Dec 2012
Posts: 832
Likes: 14
From: Lake Charles Louisiana
I was a little undecided on pinning mine. Ended up pinning it, as others have said, since I was in there anyway. Added $125 and total peace of mind to the job. If my original had started "walking" as you say yours has I would definitely have pinned it. If you mean it walked between the balancer and the crank and not the rubber hub, then there will be some damage to the crank snout. Could be as small as 1000/th's but there will be some. No way I would do that job without pinning the new one.