Hello , a few years back reading on this forum i believe it was bonzi lon that wrote about homemade lube that is my go to always for really stuck fasteners and broken bolts . 50 % lacquer thinner to 50 % automatic tranny fluid . This is the hands down best i have ever used . our mechanics at work use this now for the toughest jobs . I spray and leave to soak for a few mins and then heat with a torch and then quench the stuck bolt one more time and then proceed to loosen . Works every time !

good luck

Chris

I think it's Acetone and ATF. That works great.

Ok, here's my last input on it- I swear. The last sheared bolt I took out I ground the top smooth, used a punch, and made a divot as close to the center as I could (this step is VERY important). I then took a 1/16" bit and drilled. I went in small increments with progressively larger bits until I got near the meat of the nut I was trying to clean out. I then ran a tap into the nut (block in your case). The tap took out the remaining shards of the bolt and I was able to get a new bolt in. If you do not center the punch/first drill bit properly, you run the risk of drilling into the block which you do not want to do.

When you run a tap, you need to use a lubricant and keep going forward and backward to allow the removed material to drop out and not bind.

If you try the above start with using a left hand bit it may just back out.

yes acetone as well , zylene and a few others . the lacquer thinner is what i have been using .

chris

Yep, that was Grandpa's concoction of choice, and a few choice swear words.

Bonzi Lon

My memory serves me well most days , it is the best concoction out there . It is what got my rear brake drums off the 71 after many attempts with any thing else i could spray in the back of the drum .

Like I said our mechs use it on all our winter plows that have had 4 months of salt and sand abuse , everything comes loose easily !

Z u all later

Chris