'00 LX470 torsion bar adjustment screw frozen. Need to remove and replace

[TahoeZ]

It sounds from the above that it is very dangerous to try and cut these bolts off...View attachment 3889912

I have a 2002 Landcruiser and need to raise the front by about 0.75 inch because of a heavy ARB bumper and winch. Both sides are currently ~19.0 inches from the middle of the hub to the fender, and I have read the factory height should be 19.75 inches.

The rig is completely rusted everywhere, and I have tried every trick on this forum to move the torsion bar adjustment bolt to no avail:

• Both front tires off the ground
• Tons of PB blaster
• Torch heat
• Impact wrench
• 24 inch breaker bar

So I I’m down to cutting the bolts off as my only option, and have ordered 3 new parts for each side to replace:

• Torsion adjustment bolt: 90101-18010
• Crescent bolt: 48169-60010
• Seat, anchor arm adjuster: 48173-60010

My question for you guys have to do with the consequences of just starting to cut off the adjustment bolt:

• if I use a Sawsall to start cutting at the arrow shown in the picture below, what happens when I get all the way through?
• Is there so much tension on the “anchor arm” that it’ll snap down and is it dangerous to do this?
• Is this the right way and place to cut the bolt?
• When I replace with new hardware, is it as simple as just screwing the bolt into the new bolt until I achieve the proper tension and height?

Did you heat it up until it was red-hot, then hit it with a ¾" air impact gun?

 

[2001LC]

I've learned, to never turn the T-bar adjusting bolt. Until, addressing/inspecting bolts threads.

Threads must be clean, and it's best to oil also:

1. Use, a wire brush to clean threads. Of any and all debris, especially rust.
2. Add penetrating oil to threads. (ATF works well). Heat and cool with oil, can help draw oil into threads. The longer allowed to soak the better.
3. Raise frontends, to take weight off lower control arm. This reduce T-bars tension on adjusting bolt. In AHC systems, we just raise to "H". Otherwise we use a jack. As T-bar adjusters bolt, is turned. If resistance increases, stop turning. Clean threads, turn other way, clean threads that now expose, oil and start again. Repeat as needed.
4. A little heat on capture thread (nut) housing may help.

If debris in threads and bolt force to turn. It may damage threads, by scoring off metal from and into threads. This will lock threads permanently. Adjustors bolt, then, needs cutting off.