Are these common frame cracks? - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 12-16-2012, 09:12 PM Thread Starter
 
leeklm's Avatar
 
Join Date: Mar 2012
Location: Mpls, MN
Posts: 417
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Are these common frame cracks?

I was hoping to avoid the restoration thread, but here I am...

While cleaning up my front clip, I noticed some cobbled up welding on the frame rail, along with a crack, just in back of rear mount of the lower control arm (see red mark in pic). Both sides look the same, and had a previous repair as evidence by the chicken-s**t weld.

I plan to weld a patch over these areas to strengthen it up, but was curious if it is common for the A-body frame to crack here?

Also, I had some rust-through on the outside of frame rail where the steering box bolts on (collects garbage on the inside and rots). After cutting the bad stuff out, I am going to weld in a patch.

For these types of repairs, what gauge of steel do you guys like to use? I assume it does not need to be too heavy so you can form as needed...

Thanks!
Attached Thumbnails
Click image for larger version

Name:	frame crack.JPG
Views:	173
Size:	250.1 KB
ID:	16277  
leeklm is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 12-16-2012, 10:34 PM
 
Join Date: Oct 2007
Location: Long Island NY
Posts: 4,703
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Garage
Leek, I will check with my body man on Wednesday....he restores a lot of A body cars.....Eric



Eric Animal is offline  
post #3 of 5 (permalink) Old 12-20-2012, 06:23 PM Thread Starter
 
leeklm's Avatar
 
Join Date: Mar 2012
Location: Mpls, MN
Posts: 417
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
just bumping this up to the top... Curious if this is a common issue. I will be fixing regardless. Maybe the PO had a torque monster motor he was racing and stressed the frame? I certainly did not purchase the car with a torque monster motor...
leeklm is offline  
 
post #4 of 5 (permalink) Old 12-21-2012, 10:03 PM
 
Join Date: Oct 2007
Location: Long Island NY
Posts: 4,703
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Garage
They are not too common, unless there is a bunch of rot in the chassis. Then cracks will start to form in that place. Usually, rust out is common in CONVERTABLE car chassis, as they are closed rail, and water lays inside.
I would cut the cracks out, plate, weld and grind/body work for strength and correct look. Eric



Eric Animal is offline  
post #5 of 5 (permalink) Old 12-24-2012, 06:55 PM Thread Starter
 
leeklm's Avatar
 
Join Date: Mar 2012
Location: Mpls, MN
Posts: 417
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As I mentioned in another post, the front end had some damage once upon a time. Looks like it was on the frame rack, which would explain the cracks where they are located. It is about the only "crumple zone" these old cars had! The frame is pretty solid, except around the steering gear bolts where it collected 47 years of debri and moisture on the inside. A little patch & weld will make it as good as new.

I remember banging up a few old "bomber cars" at the track, and this is where they would all fold up at any hit above 20mph!
leeklm is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions.

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum 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 for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Factory wheel discoloration and hairline cracks Aspired Wheels and tires 4 04-03-2012 11:40 AM
Common Window Issue? doubleb0924 Service, Maintenance and Technical Discussion 10 11-30-2011 03:52 PM
common grounding issues? Chaz 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 3 12-02-2008 07:23 PM
Clunking a common problem? KinskiGTO Drive train, suspension, alignment and brakes. 13 08-28-2007 11:13 AM

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