Michael-Resurrector Posted January 21, 2020 Share Posted January 21, 2020 Anyone know how to get the door pins out of a 1957 Chevy upper back hinge, that has been welded together with rust? Here I am using vinegar to try to eat the rust out. I have hit it until it made things worse, heated it, nothing will budge them. My drill bits do nothing but spin on them. Link to comment Share on other sites More sharing options...
Mark Shaw Posted January 21, 2020 Share Posted January 21, 2020 The photo indicates the hinge pin is severely worn because the center part of the hinge is not aligned with the pin. Soak it with 50/50 Acetone and ATF with and without heat for a day or more. Then, center the parts & drive the pin out with a flat punch. Link to comment Share on other sites More sharing options...
Michael-Resurrector Posted January 21, 2020 Author Share Posted January 21, 2020 (edited) The pin is broken in 3 pieces. It is not worn, it is only close by so that they fit into the vinegar. I have beat it with a punch until the ends are splayed out making it worse. I think the only thing to do at this point is to take it to a machine shop and have it pressed out or buy a new set of pin and hinge. Also I thought of using a dremel tool, very thin grinder and cutting the side of the hinges to open it up, and if I get the pins out then weld the hinges back together. . Edited January 21, 2020 by Michael-Restomod (see edit history) Link to comment Share on other sites More sharing options...
bob staehle Posted January 21, 2020 Share Posted January 21, 2020 Michael, If it was mine I would heat the ears & pin up cherry red then drop it into a bucket of water, at this point you have nothing to lose. good luck Bob Link to comment Share on other sites More sharing options...
Michael-Resurrector Posted January 21, 2020 Author Share Posted January 21, 2020 Giggle, die you sucker die! The only thing is I ran out of propane, I have a big RV tank full, but no adapter to get it into the small bottles. But I feel the same way at this point there is not much to lose. (As said in Treasure Island, for these pins: Them that die'll be the lucky ones.) Bob and Mark here is a better picture of the hinges and pin pieces. . Link to comment Share on other sites More sharing options...
keiser31 Posted January 21, 2020 Share Posted January 21, 2020 I would say drill or find another hinge. They can't be THAT tough to find. Link to comment Share on other sites More sharing options...
Bhigdog Posted January 21, 2020 Share Posted January 21, 2020 Center punch. Drill through pin with drill 3/4 dia of the pin. Heat ears to red heat and tap pin out. No success? Use needle file to split pin. Heat to red and tap pin out. .............Bob Link to comment Share on other sites More sharing options...
PFitz Posted January 21, 2020 Share Posted January 21, 2020 Under the heading of horse out of the barn,..... mashing the ends of stuck pins and fasteners can be prevented. Anytime you need to drive out a stuck pin, use a drift pin that is close to the same diameter and slightly undersized for the hole. Make sure the end of the drift is ground flat and 90 degrees to the drift. Otherwise, if it's not perfectly flat it will mash out the stuck pin and make it a tighter fit. And if the pin end is protruding, avoid hitting the end of the pin directly with a hammer face that is a bigger diameter than the pin. Especially if the hammer face is not perfectly flat. That's like peening a rivet to mushroom. I have a roll-around tool box drawer full of different length and diameter drifts. Some steel, some brass, and some made of hard wood, for different situations and materials. Paul Link to comment Share on other sites More sharing options...
JACK M Posted January 22, 2020 Share Posted January 22, 2020 When you say you cant get the propane from the RV to the small bottles are you referring to those small torches? Those things don't get hot enough to do much good. You need an oxy acetylene set up to get real heat. 1 Link to comment Share on other sites More sharing options...
Graham Man Posted January 22, 2020 Share Posted January 22, 2020 When the hinge pin looks like this it will walk right out, you can even heat cycle it red hot a couple times, most likely it will tap right out cold. Use this method on bumper bolts for the last 30 years. Link to comment Share on other sites More sharing options...
Michael-Resurrector Posted January 23, 2020 Author Share Posted January 23, 2020 Jack M yeah I don't have a oxy acetylene setup yet, that's next on my wish list. First dirt, slab, 3 bay garage with kitchenette and utility taps. Link to comment Share on other sites More sharing options...
Michael-Resurrector Posted January 24, 2020 Author Share Posted January 24, 2020 Success (kind of). So the good news is I got the pieces of the pin out, the bad news is if these are pot metal not sure they are good anymore, to weld back into place. The moral of this story is if all else fails get violent (with a grinder, hammer and a punch). Link to comment Share on other sites More sharing options...
JACK M Posted January 24, 2020 Share Posted January 24, 2020 Don't take this wrong, but I think you should put the oxy acetylene set up higher on your list as it seems like you are doing a lot of car work and the right tools make things a lot easier. It would have just about paid for itself on this hinge project. Link to comment Share on other sites More sharing options...
Michael-Resurrector Posted January 25, 2020 Author Share Posted January 25, 2020 Jack M, I totally agree with you, but right now I am trying to scrape up $3200 for a sewer tap if they finally agree to allow one. And being able to poop is higher on my list. 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now