Need lesson on impact guns - JeepForum.com

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post #1 of 20 Old 01-21-2014, 11:01 AM Thread Starter
joecatch
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Need lesson on impact guns

The 2001 TJ I just bought has some lug nuts with missing outer shells. I bought new, solid lug nuts but for the life of me I can't break loose the lug nuts. God forbid I should get a flat tire on the road!

I have a Sear 105 PSI air compressor and tank and I was wondering if I could buy one of those $80 impact guns from Sears to use to loosen those nuts.

I don't know much about impact guns and torque. How much torque is needed to remove a lug nut put on at a garage? The impact gun Sears has for $80 is 145 footpounds. Or would I need a larger compressor and tank?

THanks.

JC

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post #2 of 20 Old 01-21-2014, 12:44 PM
swirve
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Quote:
Originally Posted by joecatch
The 2001 TJ I just bought has some lug nuts with missing outer shells. I bought new, solid lug nuts but for the life of me I can't break loose the lug nuts. God forbid I should get a flat tire on the road! I have a Sear 105 PSI air compressor and tank and I was wondering if I could buy one of those $80 impact guns from Sears to use to loosen those nuts. I don't know much about impact guns and torque. How much torque is needed to remove a lug nut put on at a garage? The impact gun Sears has for $80 is 145 footpounds. Or would I need a larger compressor and tank? THanks. JC
Why dont you just run down to the local tire shop and have them swap lugs. Probably cheaper than an impact.
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post #3 of 20 Old 01-21-2014, 12:46 PM
swirve
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I assume your using a breaker bar? Put a long piece of pipe on it and stand on it.
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post #4 of 20 Old 01-21-2014, 02:07 PM
festerw
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That gun won't be enough and your compressor won't put out enough air for one that will. Like mentioned above put a pipe on a breaker bar and have at it.

Hers - 2005 Jeep Grand Cherokee Laredo 3.7 4x4
Mine - 2003 Jeep Wrangler X
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post #5 of 20 Old 01-21-2014, 02:52 PM
hustler905
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I only have 110v wiring in the garage, so I have a small compressor like the OP has. An electric impact is cheap, mine goes to 200 lb/ft, and it's compact to store compared to a large compressor.

How about something like that?
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post #6 of 20 Old 01-21-2014, 02:59 PM
festerw
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Possible, depends on how bad they are seized on. I've had some that the stud has broken before the nut loosened. IMO use the breaker bar and if that doesn't work take it some place, it's not worth buying a tool just for that.

Hers - 2005 Jeep Grand Cherokee Laredo 3.7 4x4
Mine - 2003 Jeep Wrangler X
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post #7 of 20 Old 01-21-2014, 03:51 PM
Nick05
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if it were me i would be prepared to replace bolts while i am there, just to be safe
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post #8 of 20 Old 01-21-2014, 05:05 PM
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Put some anti seize on the studs before you put the new nuts on.
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post #9 of 20 Old 01-21-2014, 06:11 PM
tjkj2002
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Quote:
Originally Posted by bondosgto View Post
Put some anti seize on the studs before you put the new nuts on.
That just causes broken wheel studs down the road since you will now be over-torqueing the lugnuts.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #10 of 20 Old 01-21-2014, 08:05 PM
bondosgto
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Quote:
Originally Posted by tjkj2002 View Post
That just causes broken wheel studs down the road since you will now be over-torqueing the lugnuts.
Weird. Ive been doing it for 20 years and never broke one.
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post #11 of 20 Old 01-24-2014, 02:01 AM
Shadownwpa
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Garage
I've never really looked at air tools at sears, but I got my ingersol impact at Home Depot or Lowes a while back. It was $115 on sale, probably find one cheaper now though. The impact is rated for something like 350ft/lb in reverse. What you actually get depends on how high your pressure is and how much flow you're getting. I run mine all the time on a 20 gallon/3hp 'magnaforce' compressor that I don't think gets over 90 psi and it works fine. I still would give the lugs a good soak with blaster, then the breaker bar/pipe treatment. If that doesn't work warm them up a little with a torch, just the nut, since you'll be replacing them anyway. As far at it 'not being worth buying another tool'... since when does it have to be 'worth it' to get another tool? I think it's worth it to not pay someone $30 to replace your nuts.
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post #12 of 20 Old 01-24-2014, 04:48 AM
NH-JK
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I have 110 in my garage and I have a craftsman compressor. I tried the cheap 400ft Lbs torque impact gun, it wouldn't break my lugs loose. I returned it and got a 710ft. Lbs impact gun, craftsman, works great. I even used it with a reverse thread socket to get a stripped lug not off. Love it.
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post #13 of 20 Old 01-24-2014, 08:18 PM
tjkj2002
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Quote:
Originally Posted by bondosgto View Post
Weird. Ive been doing it for 20 years and never broke one.
You've been lucky.


The stated torque is for dry threads,not lubricated threads.

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #14 of 20 Old 01-24-2014, 09:47 PM
Demp
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With the caps missing, you may be dealing with some corrosion/dirt that has worked into the threads, you can try some form of penetrating oil to help. Be sure to thoroughly clean the lugs if you do use some.

The caps make the lug the right size, so a missing cap does make it a tiny bit smaller. While breaking them loose you might end up with one stuck in the socket, very annoying to remove.
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post #15 of 20 Old 01-27-2014, 08:30 AM
fishinfool
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penetrating oil

PB blaster is great. spray some on each lugnut near the back by the rim so it can find its way to the threads. wait a couple minutes and give it a try. this stuff works wonders for me. I live in the pacific northwest near the ocean so rusty bolts are common for me.
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