Subframe Body mount bolt just spins - Team Camaro Tech
Body Shop Paint & Body Forum

 6Likes
  • 1 Post By dhutton
  • 2 Post By Just 1 More
  • 2 Post By 67sc
  • 1 Post By USN1969SS
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old Jan 7th, 19, 03:10 PM Thread Starter
Senior Tech
Frank
 
Join Date: Jul 2018
Location: New Philly Ohio
Posts: 636
Subframe Body mount bolt just spins

There's always that one bolt.. Got the other 5 out and replaced, no problem.. Passenger side rear subframe bolt rusted solid, bolt was seized up.. impact and breaker bar finally got it moving but it just spins. The upper nut apparently has broke loose from it's fixed position.
What now?
Pretty sure I need to cut a hole in the floor board under the seat area to get to the top of it. I pulled the carpet and insulation back but didn't see it so i'm assuming it's sandwiched in there somewhere.. I'm disgusted right now

'68 Camaro 454, 4sp
Just 1 More is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old Jan 7th, 19, 03:14 PM
Senior Tech
Don
 
Join Date: Jun 2006
Location: Mountain Springs, Texas
Posts: 3,362
Re: Subframe Body mount bolt just spins

You can access it from a slot in the seat pan. I did it years ago. Took a bit of cussing but it worked with a big open end wrench after prying off the cage. Apply lots of Kroil or something similar. You will have to remove the seat and pull back the carpet.

Don
Just 1 More likes this.

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1956 Cameo project - C5 drivetrain
1957 Buick Caballero project
dhutton is offline  
post #3 of 13 (permalink) Old Jan 8th, 19, 06:20 AM
Gold Lifetime Member
Patrick
 
Join Date: Jun 2009
Location: Tomball TX, DeRidder LA
Posts: 1,513
Re: Subframe Body mount bolt just spins

Here is a photo of what Mr. Don is talking about. The photo below shows a bolt going through the captive nut from the top. A regular car is not that way. My seat perches are for a convertible.

You can see the square piece of metal, under the seat perch, that you are going to have to grab to hold the nut. The square piece is the part that is spinning.

[IMG]seat brace 14 by Patrick Smith, on Flickr[/IMG]

You picked the hardest one to have problems with.

Patrick
tp_smith is offline  
 
post #4 of 13 (permalink) Old Jan 8th, 19, 08:15 AM
Senior Tech
Scott
 
Join Date: Aug 2008
Location: CT
Posts: 7,278
Re: Subframe Body mount bolt just spins

Having torches makes rusted hardware removal easy. You bent the tabs that retain the captured nut. If you don't think you can easily get at the nut, just slice out the portion of the seat pan above it, do your work and weld the little piece back in. This is not a difficult repair.

Call for restoration and custom paint scheduling:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Sauron67MM is offline  
post #5 of 13 (permalink) Old Jan 8th, 19, 08:18 AM
Team Member
Darin
 
ilikeike's Avatar
 
Join Date: Jun 2013
Location: Stanislaus Co. Ca.
Posts: 1,312
Re: Subframe Body mount bolt just spins

Once you have access to it,the usual places sell new cage nuts if you want to replace it. I had to do one at the firewall, that was a pain in the ...

1968 Butternut Coupe,
421" Dart SHP block
TKO 600 RR
Dutchman 9" w/3.70 US Gear Lightning r&p
Speedtech torque arm,Ridetech HQ coilovers
Global West arms
Budnik wheels

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ilikeike is offline  
post #6 of 13 (permalink) Old Jan 8th, 19, 09:40 AM Thread Starter
Senior Tech
Frank
 
Join Date: Jul 2018
Location: New Philly Ohio
Posts: 636
Re: Subframe Body mount bolt just spins

It fought me pretty good.. even after soaking it with PB Blaster,, no budge.. I cut away a small area above the caged nut, removed the cage and still couldn't get it to break loose.. Had to resort to cutting the head off the bolt and pulling it up through. I don't have access to a welder at this time so it'll go back together with a good thick oversized washer and a lock nut with anti-seize on the threads.
I cleaned the area as best I could then sprayed it good with Eastwoods Rust Encapsulator, top, bottom, inside, outside.. everywhere I could.

20190108_104536 by F G, on Flickr
dhutton and pittpens24 like this.

'68 Camaro 454, 4sp
Just 1 More is offline  
post #7 of 13 (permalink) Old Jan 11th, 19, 04:48 PM
Tech Team
Eldon
 
Join Date: Nov 2018
Location: Calgary, Alberta
Posts: 39
That looks like a complete PITA. Glad you got it out.
Elrodeano Vanfan is offline  
post #8 of 13 (permalink) Old Feb 2nd, 19, 10:51 PM
Tech Team
Eldon
 
Join Date: Nov 2018
Location: Calgary, Alberta
Posts: 39
I just got to deal with my own cage nut spin syndrome. It was front passenger at the firewall. I ended up cutting the bolt with a saws all. I will have to weld a nut on to the broken stud and secure the cage nut and try to get it out of there. Before I tackle that I'm dropping the rear end. Fighting with the clip nuts right now.
Elrodeano Vanfan is offline  
post #9 of 13 (permalink) Old Feb 3rd, 19, 10:06 PM
Senior Tech
Kev
 
Join Date: Dec 2007
Location: North Texas
Posts: 615
Re: Subframe Body mount bolt just spins

Bolts jam on nuts because the threads get clogged with rust and junk. The key is to loosen a bit, tighten a bit, and repeat. I like a 3/8" breaker bar so I don't have to reverse the ratchet and it doesn't allow much torque. Lots of lube is also vital. Of course, it's a bit late in this case...
This sort of basic common sense is typically ignored so I imagine few will absorb the concept.
pittpens24 and Niblet like this.
67sc is offline  
post #10 of 13 (permalink) Old Feb 4th, 19, 04:56 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,064
Garage
Re: Subframe Body mount bolt just spins

Quote:
Originally Posted by 67sc View Post
Bolts jam on nuts because the threads get clogged with rust and junk. The key is to loosen a bit, tighten a bit, and repeat. I like a 3/8" breaker bar so I don't have to reverse the ratchet and it doesn't allow much torque. Lots of lube is also vital. Of course, it's a bit late in this case...
This sort of basic common sense is typically ignored so I imagine few will absorb the concept.
X2. Often guys just get a bigger breaker or impact wrench. To help with the body bolts actually tighten a little 1st then back and forth with use of PB or WD. The threads exposed above the nut cause it to lock up when you try to back it out so the tightening a little allows the lube to travel into the threads of the nut.

66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
post #11 of 13 (permalink) Old Feb 4th, 19, 05:33 AM Thread Starter
Senior Tech
Frank
 
Join Date: Jul 2018
Location: New Philly Ohio
Posts: 636
Re: Subframe Body mount bolt just spins

Quote:
Originally Posted by 67sc View Post
Bolts jam on nuts because the threads get clogged with rust and junk. The key is to loosen a bit, tighten a bit, and repeat. I like a 3/8" breaker bar so I don't have to reverse the ratchet and it doesn't allow much torque. Lots of lube is also vital. Of course, it's a bit late in this case...
This sort of basic common sense is typically ignored so I imagine few will absorb the concept.
Quote:
Originally Posted by Vega$69 View Post
X2. Often guys just get a bigger breaker or impact wrench. To help with the body bolts actually tighten a little 1st then back and forth with use of PB or WD. The threads exposed above the nut cause it to lock up when you try to back it out so the tightening a little allows the lube to travel into the threads of the nut.
Tried that.. Didn't help in this case

'68 Camaro 454, 4sp
Just 1 More is offline  
post #12 of 13 (permalink) Old Mar 10th, 19, 11:10 AM
Team Member
Dave
 
USN1969SS's Avatar
 
Join Date: Jul 2003
Location: Viera, FL
Posts: 281
Re: Subframe Body mount bolt just spins

X3 if your not in a rush. This was the middle passenger bolt, took about a week of spraying and turning back and forth. I would spray it, let it sit, do minimal turns, spray it again, spray next morning, spray after work, minimal turns and repeat process. After about a week it was able to turn without fear of breaking.
Attached Thumbnails
Click image for larger version

Name:	thumbnail_IMG_4755[1].jpg
Views:	12
Size:	73.1 KB
ID:	225563  
53Crestline likes this.

1969, 350 "Beast", M20, Nothing Fancy, Nothing Pretty, But Sure is Fun!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by USN1969SS; Mar 10th, 19 at 11:16 AM. Reason: added more info
USN1969SS is offline  
post #13 of 13 (permalink) Old Mar 11th, 19, 04:43 PM
Super Moderator
Bess-68's rule
 
Everett#2390's Avatar
 
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,558
Garage
Re: Subframe Body mount bolt just spins

Once you've figured out the repair, use antiseize on the new threads.
You'll appreciate it later in life.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
'
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - maybe this year, 2019 ...
Everett#2390 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome