Screw loose..ok missing

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Nov 16, 2019 | 03:37 PM

yellow2007

Thread Starter

Melting Slicks

Joined: Jun 2017

Posts: 2,568

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From: Conyers Georgia

Screw loose..ok missing

Si I back up onto the new ramps to check clearance for when I do my tranny flush. Not quite high enough so it's back to the floor jack and stands. While under there though I see I am missing a chassis bolt. It appears the threaded portion is in but the bolt shaft/head have broken off. I've had to remove such bolts in the past for work but this one I'd rather not screw with given the torque that must have been applied to it. Off to GM parts to at least identify the bolt and have one on hand.

Nov 16, 2019 | 04:36 PM

laserdude2215

Burning Brakes

Joined: Nov 2016

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From: San Dimas CA

Wow! What about the other side? I would not be driving the car like that.

Nov 16, 2019 | 04:56 PM

Dcasole

Le Mans Master

Joined: Oct 2014

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From: Atlanta GA

Are u sure that's not the locating pin ??

Dave

Nov 16, 2019 | 05:31 PM

Exact1

Burning Brakes

Joined: Oct 2016

Posts: 842

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From: Binghamton, NY

Quote:

Originally Posted by Dcasole

Are u sure that's not the locating pin ??

Dave

Yep, bet it's a locating pin. Look close at the pic.

Nov 16, 2019 | 05:46 PM

yellow2007

Thread Starter

Melting Slicks

Joined: Jun 2017

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From: Conyers Georgia

Quote:

Originally Posted by Dcasole

Are u sure that's not the locating pin ??Dave

T
heres one on the other side and if you look close you can see where the washer on the head of the bolt was.

Nov 16, 2019 | 06:10 PM

Zjoe6

Race Director

Joined: Aug 2015

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From: SE WI

What's this?

Nov 16, 2019 | 07:10 PM

Makitso

Racer

Joined: May 2015

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From: Utah

I would replace all the bolts on the rear cradle, probably over torqued with an impact.

Nov 16, 2019 | 07:25 PM

yellow2007

Thread Starter

Melting Slicks

Joined: Jun 2017

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From: Conyers Georgia

Quote:

Originally Posted by Zjoe6

What's this?

That's a good question. I will look in more detail the next time I am under there. I've ordered two new bolts just in case but I do know the transmission had been replaced before my purchase. Now to find the torque value..........

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Nov 16, 2019 | 08:37 PM

laserdude2215

Burning Brakes

Joined: Nov 2016

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From: San Dimas CA

Quote:

Originally Posted by yellow2007

I do know the transmission had been replaced before my purchase. Now to find the torque value..........

Wonderful. Now you need to be suspicious of every fastener that the previous shop touched and there are a lot of them.

Nov 16, 2019 | 08:41 PM

#10

yellow2007

Thread Starter

Melting Slicks

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From: Conyers Georgia

Quote:

Originally Posted by laserdude2215

Wonderful. Now you need to be suspicious of every fastener that the previous shop touched and there are a lot of them.

My thoughts exactly. I could forgive over torquing but not leaving it like that. That's just shoddy workmanship.....

Nov 16, 2019 | 09:19 PM

#11

RonC7

Safety Car

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From: St. Louis Metro East IL

Torque Values

Several tables up in the master list of how-to sticky

https://www.corvetteforum.com/forums...ue-values.html

https://www.corvetteforum.com/forums/c7-tech-performance/3498092-specifications-frame-and-underbody-fastener-tightening-torque-values.html

Nov 16, 2019 | 11:45 PM

#12

Avanti

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From: Bonneville Salt Flats

Don't over-think it. I've seen people twist-off one bolt and not damage any others. Hope one is all you have trouble with. It's possible.

Nov 17, 2019 | 12:03 AM

#13

Vetteman Jack

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Missing bolts would certainly worry me.

Good luck getting it fixed.

Nov 17, 2019 | 08:35 AM

#14

Bigredwing

Melting Slicks

Joined: Nov 2005

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From: Leonardtown Maryland

Do you have a wider shot of showing the location?. My car is on a lift and since I'm now curious I would like to check it (not that I expect anything). Thanks.

Nov 17, 2019 | 09:43 AM

#15

yellow2007

Thread Starter

Melting Slicks

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From: Conyers Georgia

Quote:

Originally Posted by Bigredwing

Do you have a wider shot of showing the location?. My car is on a lift and since I'm now curious I would like to check it (not that I expect anything). Thanks.

The locator pin is just to the left

Last edited by yellow2007; Nov 17, 2019 at 09:43 AM.

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