Remove rusted screws

[sirmike]

Hi guys

Yesterday i tried to remove different screws of my LC 100 1998.
Now, the problem is, that many screws are rusted/fix.
As example the screws whitch fix the the mounting bracket of the spare wheel at the chassis.
If i want to remove this screws, they brake

I think i'm note the only one Land Cruiser owner with this kind of problems.
What is your way to remove rusted screws?
Do you heat the area?

Thanks a lot in advance, Mike

 

[e9999]

well, one way to help with that is to put on penetrating oil a few times at intervals of a few hours (or days) before you think you may need to take something off.
Usual recommendation is Kroil or PB Blaster but then I read recently that Liquid Wrench works just as well for less $.

But yes, heating things up with a torch will also help sometimes. (Have a fire extinguisher handy.)

 

[Sandroad]

In addition to penetrating oil and heat, solid hits with a brass drift can help a lot. An impact wrench can get things moving too.

 

[LostAfrican]

I have had the most success with applying some heat (and soaking regularly with PB). I still had to drill a few out and then re-tap them which is always risky, but its my last resort. I have had to remove 6 broken stubs from the "engine undercover" bolts! I think they were broken originally by overzealous use of an impact wrench at the shop...

For the drilling I started with a small diameter carbide bit and worked may way up to the one spec'ed for the tap.

A

 

[AimCOtaco]

Yep, solid hits square on the head, penetrating oil, and tools that don't damage heads.
Use more impact and less force to loosen without breaking.

Unfortunately removing rusted fasteners is an art whose masters must slave and struggle and break lots of stuff along the way.

 

[sirmike]

Thank you for the replies. I will try to remove the screws with your instructions

It will be a shi* anyway....

Mike

 

[CanadianRockyCruiser]

1.)Stick with PB blaster, heat, and brass drifts as your first course of action.

2.) If the head is broken off, you can use two shallow nuts to thread over the remaining stud. Line up the hexagonal nuts and use a long socket over both. I've used this one for stuck studs/broken bolts too.

3.) For those extra tough ones, welding a larger diameter nut to the existing bolt/screw will help you apply additional torque. I've used this with success on many rusted bolts on my LX470. I'ts what I usually resort to when the head of a bolt has broken off or stripped.

4.) Drill out, as described above, and re-tap (last resort)