Help!! Crank is loose again
Team Owner
Joined: Mar 1999
Posts: 22,025
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From: At the beach in little Rhody
Melting Slicks
Joined: Oct 2007
Posts: 2,464
Likes: 2
From: Cedarburg, WI
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you examine the damper HUB in these pictures, you will see that there is a KEY WAY running down the length of the hub.
When you use the ATI pinning kit, you place a machined tool steel guide on the crank snout. The guide has drilled holes in it that accepts drill guides. You use a drill to drill the side of the crank snout and then a ream to finial boar the hole to a press fit size for the small steel pin that gets fitted into the hole. Once the pin is fitted/pressed into the hole, you can slide the Powerbond damper on to the crank snout over the pin.
The pin prevents the damper from spinning on the crank snout which allows the damper bolt to come loose.
In my opinion, the ATI pinning method is superior to the other method of pinning but,,thats just my opinion.
I had the fear that pinning the crank was going to be difficult and time consuming. In fact, it took longer to gather up the drill and other tools to start the job than it did to do the job. Very easy!
When you use the ATI pinning kit, you place a machined tool steel guide on the crank snout. The guide has drilled holes in it that accepts drill guides. You use a drill to drill the side of the crank snout and then a ream to finial boar the hole to a press fit size for the small steel pin that gets fitted into the hole. Once the pin is fitted/pressed into the hole, you can slide the Powerbond damper on to the crank snout over the pin.
The pin prevents the damper from spinning on the crank snout which allows the damper bolt to come loose.
In my opinion, the ATI pinning method is superior to the other method of pinning but,,thats just my opinion.
I had the fear that pinning the crank was going to be difficult and time consuming. In fact, it took longer to gather up the drill and other tools to start the job than it did to do the job. Very easy!
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Hi Bill,
Is the Powerbond 25% UD Corvette Balancer Pulley #25-PBU1117SS25 @ $199.99 the crank pinned one you are talking about?
REF: http://www.texas-speed.com/shop/item...d=629&catid=16
Thanks in advance
Christian
Christian
PS: I just spinned my second ASP on my new 416...
Is the Powerbond 25% UD Corvette Balancer Pulley #25-PBU1117SS25 @ $199.99 the crank pinned one you are talking about?
REF: http://www.texas-speed.com/shop/item...d=629&catid=16
Thanks in advance
Christian
Christian
PS: I just spinned my second ASP on my new 416...
BC
Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Does this procedure seems right to you?
What did I miss?
Check for damage on Crankshaft (and eventually metal shaving through the engine) after extraction of the “new” freshly mounted ASP Pulley
Identify the Key Hole inside the Scat 4340 LS1 4.000 crank and insert the appropriate Key
Change and replace OIL SEAL with OEM one
Warm up the Powerbond Pulley @ 200°F for 40’ in an oven and align the Powerbond Keyway vs. the crankshaft key
Use MOLYLUBE on ARP bolt for tightening
First pass is something like 38 ft lbs.
NEXT AND MOST IMPORTANT is the torque 140 DEGREES of rotation.
Use the provided Serpentine Belt, and replace other belt if necessary
Christian
What did I miss?
Check for damage on Crankshaft (and eventually metal shaving through the engine) after extraction of the “new” freshly mounted ASP Pulley
Identify the Key Hole inside the Scat 4340 LS1 4.000 crank and insert the appropriate Key
Change and replace OIL SEAL with OEM one
Warm up the Powerbond Pulley @ 200°F for 40’ in an oven and align the Powerbond Keyway vs. the crankshaft key
Use MOLYLUBE on ARP bolt for tightening
First pass is something like 38 ft lbs.
NEXT AND MOST IMPORTANT is the torque 140 DEGREES of rotation.
Use the provided Serpentine Belt, and replace other belt if necessary
Christian
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
First pass is something like 38 ft lbs.NEXT AND MOST IMPORTANT is the torque 140 DEGREES of rotation.
The ARP bolt gets TORQED to 240 ft/lbs and does NOT get angled torqed!!
Hope I caght you in time..
BC
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Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Christian
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
bump....whats the tq spec for arp....i never had an issue with the stock bolt and 240 lbs of tq...im about to remove for a cam swap and using a arp bolt this time....dont have plans of pinning my crank as Im NA
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Im NA also BUT,,,,,,,,,,,,,pinning is very easy and good insurance that you WONT have an issue. I pinned mine and glad i did..
If you have access to a pinning kit,,,DO IT!
BC
