2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Fixing pinchwelds?

Thread Tools
 
Search this Thread
 
Old Feb 18, 2024 | 09:49 AM
  #1  
Loose-Goose1255's Avatar
Thread Starter
Full Member
 
Joined: Feb 2023
Posts: 74
Likes: 10
From: Rockledge, florida
Fixing pinchwelds?

I'm doing a full restoration on my 1988 FC and like many others I'm sure, my pinchwelds are smashed in and would ideally like to have them back. I'm not sure how to go about it, can I just pull them back out? Or do I cut and weld new pinchwelds in? Any advice is greatly appreciated
Reply
Old Feb 18, 2024 | 09:59 AM
  #2  
j9fd3s's Avatar
Moderator
Community Builder
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
its kind of a pain, but you want to pull them back out.
i use a screw driver to get it bent out enough i can use pliers or something.
also you might want like a yardstick just so you have something to see how straight it is
Reply
Old Feb 18, 2024 | 11:37 AM
  #3  
Malic's Avatar
Full Member
Veteran: Air Force
 
Joined: Jun 2021
Posts: 166
Likes: 38
From: Minnesota
I am in the middle of doing this as well, I use duckbilled vice grips to bend them back into place, I am going to be grinding and building them back up with weld, as they are the only rust bit as the paint as scraped off when previous owner tried to jack the car up. I try to only lift by the engine cross member or rear diff, so front or rear only, not use the sides

Reply
Old Feb 18, 2024 | 02:36 PM
  #4  
Hot_Dog's Avatar
Rotary Freak
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: Nov 2001
Posts: 1,520
Likes: 231
From: Alexandria, VA
Originally Posted by Malic
I am in the middle of doing this as well, I use duckbilled vice grips to bend them back into place, I am going to be grinding and building them back up with weld, as they are the only rust bit as the paint as scraped off when previous owner tried to jack the car up. I try to only lift by the engine cross member or rear diff, so front or rear only, not use the sides

I just bought a pair of those duckbill vice grips to straighten my pinch welds. Haven't gotten to it yet, but I think they should work just fine. Let us know how your job turns out.
Reply
Old Feb 18, 2024 | 05:35 PM
  #5  
pistones's Avatar
Senior Member
Tenured Member: 20 Years
Liked
iTrader: (5)
 
Joined: Oct 2005
Posts: 736
Likes: 6
From: nyc
depends on how badly smashed they are. if they are crushed, you might need to pull them back down with a hydraulic ram. if they aren't bad then you can hammer and dolly them straight.
Reply
Old Feb 20, 2024 | 05:55 PM
  #6  
Loose-Goose1255's Avatar
Thread Starter
Full Member
 
Joined: Feb 2023
Posts: 74
Likes: 10
From: Rockledge, florida
Originally Posted by Malic
I am in the middle of doing this as well, I use duckbilled vice grips to bend them back into place, I am going to be grinding and building them back up with weld, as they are the only rust bit as the paint as scraped off when previous owner tried to jack the car up. I try to only lift by the engine cross member or rear diff, so front or rear only, not use the sides

thanks I'll pick some of these up to give it an attempt, hope it all goes well
Reply
Old Feb 20, 2024 | 05:56 PM
  #7  
Loose-Goose1255's Avatar
Thread Starter
Full Member
 
Joined: Feb 2023
Posts: 74
Likes: 10
From: Rockledge, florida
Originally Posted by pistones
depends on how badly smashed they are. if they are crushed, you might need to pull them back down with a hydraulic ram. if they aren't bad then you can hammer and dolly them straight.
iffy, some spots are pretty bad but its unevenly smashed, so hard to tell how bad it is overall
Reply
Old Feb 21, 2024 | 10:54 AM
  #8  
j9fd3s's Avatar
Moderator
Community Builder
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
i used a yardstick to get an idea of what straight would be, its hard to tell when you're upside down.
i took the rubber plugs out, and then used some hook type tool to pull it straight. think of it like paintless dent repair.

this is the best pic ive got, i did what i could buts its not perfect

Reply
Old Feb 21, 2024 | 12:49 PM
  #9  
1badFB's Avatar
GSSL-SE
Tenured Member: 20 Years
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Aug 2003
Posts: 1,386
Likes: 240
From: Canada
Once upon a time I took a length of 1.5" x 1/8" steel angle and cut it into an L shape that "capped" the stock pinch weld. I swiss cheesed it and used the holes to weld it to the existing pinch before grinding it flat.

It was a lot of work but turned out great! You could pick the car up anywhere on the new strip. I owned the car for a number of years afterwards and it always looked perfect.

-Alex
Reply
Old Feb 21, 2024 | 01:34 PM
  #10  
Loose-Goose1255's Avatar
Thread Starter
Full Member
 
Joined: Feb 2023
Posts: 74
Likes: 10
From: Rockledge, florida
Originally Posted by 1badFB
Once upon a time I took a length of 1.5" x 1/8" steel angle and cut it into an L shape that "capped" the stock pinch weld. I swiss cheesed it and used the holes to weld it to the existing pinch before grinding it flat.

It was a lot of work but turned out great! You could pick the car up anywhere on the new strip. I owned the car for a number of years afterwards and it always looked perfect.

-Alex
interesting, if I cant fix it with the duckbill vise grips I'll definetly try this
Reply
Old Feb 21, 2024 | 01:35 PM
  #11  
Loose-Goose1255's Avatar
Thread Starter
Full Member
 
Joined: Feb 2023
Posts: 74
Likes: 10
From: Rockledge, florida
Originally Posted by j9fd3s
i used a yardstick to get an idea of what straight would be, its hard to tell when you're upside down.
i took the rubber plugs out, and then used some hook type tool to pull it straight. think of it like paintless dent repair.

this is the best pic ive got, i did what i could buts its not perfect
thank you and you are very right, being upside down definetly alters your perspective
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jpotter94
Suspension/Wheels/Tires/Brakes
2
May 14, 2014 12:24 AM
thethingthatshouldnotbe
2nd Generation Non-Technical and pictures
48
Mar 20, 2014 09:27 PM
philiptompkins
2nd Generation Non-Technical and pictures
46
Sep 12, 2008 02:45 AM




All times are GMT -5. The time now is 05:27 PM.