Overtightened Balancer Bolt
Thread Starter
Instructor
Joined: Mar 2007
Posts: 117
Likes: 1
From: Mexico Beach FL
Overtightened Balancer Bolt
OK guys, I'm in the middle of replacing the balancer on my 05. I was just doing a stock replacement with the stock bolt (couldn't get an ARP bolt here in under 3 weeks and this was the long weekend where I'd have time). I was doing the 37 lb-ft + 140 degrees and reached 236 lb-ft at bout 60 deg using the torque dial I got (so I thought). When I got to about 120 deg, I pulled the setup off to just take a peek at the mark and I was really at about 200 degrees.
So, do I need to pull the bolt and start over with a new one or am I OK to just leave it?
Thanks
V/R
Bill
So, do I need to pull the bolt and start over with a new one or am I OK to just leave it?
Thanks
V/R
Bill
Thread Starter
Instructor
Joined: Mar 2007
Posts: 117
Likes: 1
From: Mexico Beach FL
Definitely used a new bolt, and have another one coming to the parts store tomorrow, I'm just not sure if I stretched it to the point of weakening the bolt. I'd prefer to just leave it in there.
Burning Brakes
Joined: Aug 2014
Posts: 1,237
Likes: 257
From: Tampa FL
Melting Slicks
Joined: Jun 2006
Posts: 2,462
Likes: 259
From: Miami Florida
Leave it in there did you clean the mating surface oil before you install the bolt so it could hold.
Burning Brakes
Joined: Jul 2002
Posts: 1,123
Likes: 99
From: Nova Scotia
I'm not sure what the spec is, but if you're saying you went 80* too far I would replace it for piece of mind, that's quite a bit of extra stretch. I believe those bolts are torque to yield which is why they are one time use
Thread Starter
Instructor
Joined: Mar 2007
Posts: 117
Likes: 1
From: Mexico Beach FL
Thanks, Hubes and everyone else). I ended up pulling it out of there. I calculated that I had stretched it 142% of the spec. You can see that it's ever so slightly longer than the original, which is ever so slightly longer than the brand new one I have now. I did search around for a stress-strain curve for whatever steel a 10.9 bolt is made of since I figured I may be OK if I was still on the up side, but no one seems to publish those. It makes having an engineering degree useless to my hobbies!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
