Pinning the crank - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

blufin · 10-06-2010, 05:47 PM

Hey guys,
I'm thinking about a sc install and may do it myself to save money. I have read several threads discussing "pinning the crank", but have no idea what that is. Can someone please give me an idea of why this is done and exactly how it is done? If it is something that is easily screwed up, I may pass on installing myself.
Thanks.

Blitzman · 10-06-2010, 06:02 PM

Basically youre going to drill a hole into the crank and insert a 1/4" pin that keeps the crank pulley from spinning on the hub under quick acceleration. I cant think of anyway to really screw it up offhand. Most kits come with a drill guide. Its held in place inside of the hub and then you either remove the radiator and use a regular drill or get a right angle drill and leave the radiator in.

blufin · 10-06-2010, 06:35 PM

Doesn't sound too complicated. No other way to keep the crank pulley from spinning, I guess.

Camaro_Custom_Painted · 10-06-2010, 07:55 PM

Remember to lubricate the drill bit. It heats up and binds quickly.

racer778 · 10-06-2010, 09:01 PM

It's easy. you get the drill guide a drill bit marked to the depth you need to go to. I also painted the bit red to ensure I didnt go deeper than required. a reamer and thn you tap the pin in DONE. all you need to do is remove the fans if you have a right angle drill.

sting808 · 10-06-2010, 10:56 PM

Quote:

Originally Posted by racer778

It's easy. you get the drill guide a drill bit marked to the depth you need to go to. I also painted the bit red to ensure I didnt go deeper than required. a reamer and thn you tap the pin in DONE. all you need to do is remove the fans if you have a right angle drill.

How critical is it to get the hole perpendicular to the crank face(precise)? Does the Vortech pinning process have some tolerances for slight angle deviations?

If precision required, I would think removing the radiator and having more room would be better than using a 90* drill from above.

Blitzman · 10-07-2010, 12:30 AM

Quote:

Originally Posted by sting808

How critical is it to get the hole perpendicular to the crank face(precise)? Does the Vortech pinning process have some tolerances for slight angle deviations?

If precision required, I would think removing the radiator and having more room would be better than using a 90* drill from above.

Vortechs drill guide doesnt have alot of tolerances for angle deviation, it will seize if not lined up almost dead on.

TPEHater · 10-07-2010, 12:58 AM

There are two different types of pinning kits in the LS world.

One goes in the front of the crank under the crank bolt, one goes into the side of the pulley - make sure you choose the proper one for your application.

JustaCamaro · 10-07-2010, 06:46 AM

My questions is how do you line the pin bore back up if you later remove the damper for lets say a cam change?

Even a thousandth off and you won't be able to put the pin back in.

Will@Apf · 10-07-2010, 07:52 AM

Quote:

Originally Posted by JustaCamaro

My questions is how do you line the pin bore back up if you later remove the damper for lets say a cam change?

Even a thousandth off and you won't be able to put the pin back in.

Lots of luck or you might have to pin a new hole..

IPS Brandon · 10-07-2010, 09:46 AM

How about some pictures

Here is one I did on an LS1 I installed in my 240 SX.

Pin kits, can be had from multiple places and are inclueded in most kits

It is very hard to mess this process up, just make certain to drill at a straight angle and you will have no issues. This process of pinning the crank will prevent the factory dampner from spinning on the crank snout and allowing the balancer bolt to walk out along with the balancer. It is required due to the press fit OE balancer on all high torque applications (at least at our shop it is required).

Regards

Jessika · 10-07-2010, 10:31 AM

Here are a couple more pictures,
1st the Magna Charger pin kit.
2nd the only picture I remembered to take during my install.

Z_Rocks · 10-07-2010, 10:33 AM

Quote:

Originally Posted by Will@Apf

Lots of luck or you might have to pin a new hole..

OMG, are you back Will? Been asking about you... John did say you should be back soon. Good to see you!

Will@Apf · 10-07-2010, 11:59 AM

Quote:

Originally Posted by Z_Rocks

OMG, are you back Will? Been asking about you... John did say you should be back soon. Good to see you!

Im good as new, and my doctor is 20+k richer!!

10-06-2010, 05:47 PM	#1
blufin Drives: Fire Engine Join Date: Oct 2008 Location: WPB, Florida Posts: 1,415	Pinning the crank Hey guys, I'm thinking about a sc install and may do it myself to save money. I have read several threads discussing "pinning the crank", but have no idea what that is. Can someone please give me an idea of why this is done and exactly how it is done? If it is something that is easily screwed up, I may pass on installing myself. Thanks. __________________ 12.618 @ 110.75 Bone Stock 1/4 mile 8.165 @ 86.52 Bone Stock 1/8 mile 11.189 @ 124.44 on a 1.73 60' TVS2300 3.4 pulley, JRE tuned, Kooks LT headers and HF cats, MBRP catback exhaust, CAI intake, ADM scoop. Stock wheels/tires. Sold

10-06-2010, 06:02 PM	#2
Blitzman 173rd Paratrooper Drives: Summit White SS Join Date: Aug 2010 Location: Houston Posts: 152	Basically youre going to drill a hole into the crank and insert a 1/4" pin that keeps the crank pulley from spinning on the hub under quick acceleration. I cant think of anyway to really screw it up offhand. Most kits come with a drill guide. Its held in place inside of the hub and then you either remove the radiator and use a regular drill or get a right angle drill and leave the radiator in. __________________ Jeramey - 715rwhp Vortech YSI - 10Rib CTS-V Dual Fuel Pumps American Racing Headers Thunder Racing Cam Walker Bullet Exhaust DSS 1400hp Axles Barton Industries Shifter ADM Boost/AFR Gauges

10-06-2010, 06:35 PM	#3
blufin Drives: Fire Engine Join Date: Oct 2008 Location: WPB, Florida Posts: 1,415	Doesn't sound too complicated. No other way to keep the crank pulley from spinning, I guess. __________________ 12.618 @ 110.75 Bone Stock 1/4 mile 8.165 @ 86.52 Bone Stock 1/8 mile 11.189 @ 124.44 on a 1.73 60' TVS2300 3.4 pulley, JRE tuned, Kooks LT headers and HF cats, MBRP catback exhaust, CAI intake, ADM scoop. Stock wheels/tires. Sold

10-07-2010, 12:58 AM	#8
TPEHater Drives: 2005 Holden Monaro Join Date: Mar 2010 Location: Las Vegas Posts: 20	There are two different types of pinning kits in the LS world. One goes in the front of the crank under the crank bolt, one goes into the side of the pulley - make sure you choose the proper one for your application. __________________ Arthur DesertMuscleLV.net - Las Vegas, NV 2005 Pontiac GTO \| PBM/Black \| 364ci LS2 \| TVS1900 \| T56 \| 661 RWHP / 636 RWTQ 2003 Cobra \| Redfire/Parchment \| 376ci LS3 \| PT4780 \| TH400 \| Build in Progress

10-07-2010, 10:31 AM	#12
Jessika Account Suspended Drives: Anything Blown Join Date: Aug 2010 Location: SoCal Posts: 1,194	Here are a couple more pictures, 1st the Magna Charger pin kit. 2nd the only picture I remembered to take during my install. Attached Images

10-06-2010, 07:55 PM	#4
Camaro_Custom_Painted Choke on that causality! Drives: 2010 2SS/RS Join Date: Sep 2009 Location: Minnesota Posts: 645	Remember to lubricate the drill bit. It heats up and binds quickly.

10-06-2010, 09:01 PM	#5
racer778 Camaro Sold Drives: 2010 camaro 2SS/RS Join Date: Jan 2010 Location: San Antonio Texas Posts: 864 View My Garage	It's easy. you get the drill guide a drill bit marked to the depth you need to go to. I also painted the bit red to ensure I didnt go deeper than required. a reamer and thn you tap the pin in DONE. all you need to do is remove the fans if you have a right angle drill.

10-07-2010, 06:46 AM	#9
JustaCamaro Drives: 2010 Camaro SS Join Date: Feb 2010 Location: Oklahoma Posts: 247	My questions is how do you line the pin bore back up if you later remove the damper for lets say a cam change? Even a thousandth off and you won't be able to put the pin back in.

10-07-2010, 09:46 AM	#11
IPS Brandon Drives: 2010 Camaro SS black Join Date: Aug 2009 Location: Columbus Ohio Posts: 907	How about some pictures Here is one I did on an LS1 I installed in my 240 SX. Pin kits, can be had from multiple places and are inclueded in most kits It is very hard to mess this process up, just make certain to drill at a straight angle and you will have no issues. This process of pinning the crank will prevent the factory dampner from spinning on the crank snout and allowing the balancer bolt to walk out along with the balancer. It is required due to the press fit OE balancer on all high torque applications (at least at our shop it is required). Regards

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