I tried removing the T40 size security bolt that fastens the end of the torsion rod to the decklid hinge. i ended having to dremel 2 flats on the head and vice-grip it off... the head sheared off and now im left with a piece of the bolt still in the hinge. assuming i can drill out the piece and salvage the M6-1.00 threads, can i just use a normal M6-1.00 bolt to put it back together?
Reason i ask is this bolt appears to have some unusual geometry. It appears to have a length of shoulder under the head before the threads start and some kind of taper at the end of the bolt.
Oops, sorry you're talking about the security strap retainer? If so it's probably at least a 9.8. Sail area can be a real pain at times. Mine are in a box can't get to them at the moment.
You will want to replace it with another shoulder bolt. Shoulder bolts are designed to allow the bolt to be fully tightened and for the part contained on the shoulder part free to rotate slightly.
McMaster had a bunch of options, but you will need to know the thread length, shoulder diameter and shoulder length. If the threads are too long, you can cut off the excess. If the shoulder is too long, you can add a washer. https://www.mcmaster.com/pr.../?s=m6+shoulder+bolt
OK thanks, Unfortunately the shoulder measures .350 inch diameter or 8.9 mm which is non-standard shoulder diameter in the mcmaster catalog. I looked a couple other places too.
I may have to turn down a larger bolt on a lathe. Or maybe slide a custom bushing over a normal bolt.
[This message has been edited by gregr75 (edited 05-08-2024).]
...or just buy a set of good used ones from someone on here?
or he could find some off the shelf stuff to help figure out how to remake a bunch of the weird rare bolts. I'm still working on making the tail light bolts for a notchback because it would be nice to buy new ones and know they are obtainable, also working on decklid screws that aren't 30 bucks from the fiero store.
OK thanks, Unfortunately the shoulder measures .350 inch diameter or 8.9 mm which is non-standard shoulder diameter in the mcmaster catalog. I looked a couple other places too.
I may have to turn down a larger bolt on a lathe. Or maybe slide a custom bushing over a normal bolt.
I think a brass tube might work over a standard bolt, might need to do a Russian nesting doll approach to make it tight but it should work, turning a bolt down is definitely the easiest though
OK thanks, Unfortunately the shoulder measures .350 inch diameter or 8.9 mm which is non-standard shoulder diameter in the mcmaster catalog. I looked a couple other places too.
I may have to turn down a larger bolt on a lathe. Or maybe slide a custom bushing over a normal bolt.
I made a bolt for this like 20 minutes ago for my 84, I took a oil pan bolt and made a bushing out of a thick wall copper tube available at home depot and it worked to fasten my terrifying torsion springs to the hinges (they broke the pin like 5 minutes later and tried to self disassemble)
I think a brass tube might work over a standard bolt, might need to do a Russian nesting doll approach to make it tight but it should work, turning a bolt down is definitely the easiest though
With the tension that is on the rod, it would chew through that brass/copper sleeve in a short time.
Think GM used "red locktite" on those bolt that needs 250-400°F Heat to remove. (Most hardware w/ "locktite" GM etc uses @ car factory are Dry formulas equiv or better then thread lock chems available to the public.)
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Originally posted by Mickey_Moose: With the tension that is on the rod, it would chew through that brass/copper sleeve in a short time.
Yup, those bars are major loaded when the lid is closed & the links try to saw thru whatever on the way open or close. Some Steel & other tubing is soft & "weak" too for cutting w/ standard tube cut wheels & may not work long doing this job.
Some say might help to grease them but grease/oil will hold dirt etc often in longer term does more damage.
Dry Teflon & related often doesn't help much or at all w/ high load items but I still spray them because helps keep crap off everywhere else on the links & bars.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
