Tightening the crank bolt to 140 degrees? - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

old motorhead · 07-31-2013, 04:13 PM

Quote:

Originally Posted by strych9

For the cheap price of the bolt, it would be a good idea to replace it.

Since the balancers aren't keyed to the crank, there is a very real potential for the bolt to come loose if not properly torqued. Use red Loctite on the threads when you go back in.

You're saying that turning it 140 degrees with an impact wrench is somehow substandard to turning it 140 degrees with elbow power?

04GOAT-11SS · 07-31-2013, 10:04 PM

I hit mine in with an impact too after not being able to get it near 140*. It's been fine but I did purchase an ARP bolt and the tool to lock the flywheel. Haven't got around to installing it yet though.

Iam Broke · 08-01-2013, 04:54 AM

Quote:

Originally Posted by old motorhead

You're saying that turning it 140 degrees with an impact wrench is somehow substandard to turning it 140 degrees with elbow power?

Only thing I can fathom is the harsh ratcheting of the impact could crack or damage the bolt compared to a hand tightening. I doubt it makes a difference though. Need a metallurgist. lol.

strych9 · 08-01-2013, 06:30 AM

Quote:

Originally Posted by old motorhead

You're saying that turning it 140 degrees with an impact wrench is somehow substandard to turning it 140 degrees with elbow power?

Of course it is. When you take a hammer to metal, what happens? The factory bolts are torque to yield. An impact disproportionately stretches them. That can result in it coming loose, or breaking at some point. Good luck with that. You can rattle them off if you want to, but always install them by hand. ARP bolts are a different story.

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willhe64 · 08-01-2013, 11:17 AM

Got mine to 140 with a 4 foot snipe and the help of a 215 pound hockey player.

old motorhead · 08-01-2013, 09:01 PM

Quote:

Originally Posted by strych9

Of course it is. When you take a hammer to metal, what happens? The factory bolts are torque to yield. An impact disproportionately stretches them. That can result in it coming loose, or breaking at some point. Good luck with that. You can rattle them off if you want to, but always install them by hand. ARP bolts are a different story.

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Mine's been running for several years and thousands of miles done with an impact wrench. I think I'll continue to take my chances. Maybe I'm just lucky

Mikes SS · 08-06-2013, 10:55 PM

Shit, I'd be worried the bolt would snap off trying to get the 140* versus "as tight as I can get it" and if it does, you'd be replacing a crank and a fender for sure. I wouldn't lose any sleep over a pinned crank and as tight as hell!

EliteCZM523 · 08-07-2013, 01:28 PM

Don't use Impact guns to tighten the Crank Bolt.....Take a peek at the mating surface of the Crank Bolt - See that red stuff there? Now look at a used version of same bolt - notice the difference? Using a Impact Gun will not allow that mating surface to do what its designed to do. Not to mention that you can jack up those crank threads. Also, get the Flywheel locking tool and use a 4-5' Pipe to give you more leverage.

07-31-2013, 10:04 PM	#30
04GOAT-11SS Drives: 2011 2SS/RS 2004 GTO Join Date: Sep 2012 Location: Long Island NY Posts: 42	I hit mine in with an impact too after not being able to get it near 140*. It's been fine but I did purchase an ARP bolt and the tool to lock the flywheel. Haven't got around to installing it yet though. __________________ 2011 2SS/RS - Kooks Headers, HFCs, Corsa exhaust, Magnacharged, Cold Air Inductions CAI, tuned by JRE

08-01-2013, 11:17 AM	#33
willhe64 Drives: 2012 45th Vert, 2011 4x4, 9sec Vega Join Date: Mar 2012 Location: Canada Posts: 2,188	Got mine to 140 with a 4 foot snipe and the help of a 215 pound hockey player. __________________ I feel it only fair to warn you, I have a black belt in CAPS LOCK.

08-07-2013, 01:28 PM	#36
EliteCZM523 Drives: 2010 2SS/RS Join Date: Sep 2010 Location: Westchester, NY Posts: 99	Don't use Impact guns to tighten the Crank Bolt.....Take a peek at the mating surface of the Crank Bolt - See that red stuff there? Now look at a used version of same bolt - notice the difference? Using a Impact Gun will not allow that mating surface to do what its designed to do. Not to mention that you can jack up those crank threads. Also, get the Flywheel locking tool and use a 4-5' Pipe to give you more leverage. __________________ ARH 1 7/8 w/ cats, Borla ATAK Axle Back, VaraRam, ECS Cam, JDP Halo Kit, Technostalgia Tail Lights, AAC Ghosted SMD Side Markers, Reverse Lights, P13W Plasma DRL's, DRL Harness, Kenwood 9990HD, Scosche Kit, and tons more

08-06-2013, 10:55 PM	#35
Mikes SS Drives: '10 CGM 2SS/RS 6M Join Date: Oct 2009 Location: North Central Florida Posts: 1,032 View My Garage	Shit, I'd be worried the bolt would snap off trying to get the 140* versus "as tight as I can get it" and if it does, you'd be replacing a crank and a fender for sure. I wouldn't lose any sleep over a pinned crank and as tight as hell!