5vzfe on engine stand. Bought a brand new 800lbs torque impact gun.....will not get the bolt off. And all my craftsman tools keep breaking (and they are even american ones).

Shouldn't 800lbs be MORE than enough?

I have 1/4th fittings on (for now)...but will going to the 3/8th really make that big of a difference?

I'm going to try switching tomorrow, and seeing if that works...if not that impact is going back to the store.

 

wait... you're using 1/4" sockets for that? Hell I broke one of my good snap-on 1/2" breaker bars and a 19mm socket getting off the last crank pulley I had to remove. You will need at least a 3/8 drive for that. they're usually pretty snug.
Are you sure that gun makes 800 FOOT pounds and not inch pounds?

 

LOL...sorry, I wasn't clear. I am using 1/2" sockets....and 1/4" air hose fittings.

My question is, by upgrading to 3/8th air hose fittings....will it honestly make a drastic difference?

Yes I know I should be running bigger hoses, fittings, etc....but for simply one bolt it should be fine correct?

I just for 1, can't see switching to 3/8...or even 1/2, fittings making a world of difference.

And 2, I can't believe in hell that 800 lbs (double checked...it is ft lbs) is not enough to even make it budge.

Something has got to be wrong. I even had the damn bolt out about a month ago...and only put it in with a 1/2" wratchet without a cheater pipe.

I am a newbie at using air tools/compressors. But I'm not a moron...gun set on strongest setting....air comp up to 125...etc.

Its recommend ed at 90, but would going to 125 lower perform ance?

 

LOL...sorry, I wasn't clear. I am using 1/2" sockets....and 1/4" air hose fittings.

My question is, by upgrading to 3/8th air hose fittings....will it honestly make a drastic difference?

Yes I know I should be running bigger hoses, fittings, etc....but for simply one bolt it should be fine correct?

I just for 1, can't see switching to 3/8...or even 1/2, fittings making a world of difference.

And 2, I can't believe in hell that 800 lbs (double checked...it is ft lbs) is not enough to even make it budge.

Something has got to be wrong. I even had the damn bolt out about a month ago...and only put it in with a 1/2" wratchet without a cheater pipe.

I am a newbie at using air tools/compressors. But I'm not a moron...gun set on strongest setting....air comp up to 125...etc.

Its recommend ed at 90, but would going to 125 lower perform ance?

 

Last time I took the crank bolt off of my 7mge I had to use a 7' breaker bar extension on my snap on 1/2" drive breaker bar.

Also make sure your going in the right direction.

 

No, there should be no performance loss running at a higher pressure.

+1
Try doing it by hand with a breaker bar, sometimes those guns just dont work as well as "the old fashioned" methods.

 

Problem is....my damn sockets break before that. I use about a 2' breaker bar...and a lot of extensions..and a few sockets have cracked.

And of course that just sends me into a tool throwing rage.

 

I don't know a lot about air pressure, but I don't see swapping to 3/8" air fittings making that much difference. For high volume air tools like a sander perhaps, but not a wrench. Perhaps I'm wrong, I dunno.

On my 22re I had to brace a 2ft, 1/2" breaker bar against frame and blip the starter to loosen the bolt. This was of course after the first 2 attempts sheared a 3/8" breaker bars male input and when I moved up to 1/2" It split a non-impact 6-pt socket

 

And they are good tools too...craftsman (before the new China gummy bears!).

But regardless....the bolt should give. If I have enough force that solid sockets are breaking....and freaking 800lbs doesn't budge....what gives?!

I even had the impact go both directions for a bit to break things lose.

 

I've always had to do the starter method(which I hate), because its the only way that works....but its on a stand.

 

Since the engine is on a stand, use leverage to your advantage. I assume you already have a nice, big, beefy bar to hold the crank pulley itself, I would recommend something 3-4' (feet) in length at a minimum.

Then grab your biggest breaker bar (either 1/2" or 3/4") and find a decent piece of pipe/tube that will fit over the handle, again you're looking for at least 3-4' (feet) in overall length, longer is better, since the longer it is the more leverage you can achieve with the same effort.

You will want a buddy with you, one person take the wrench with the breaker bar, the other person on the pulley holder, and making sure you're turning in the right direction start applying pressure to both ends as far out as you can. For what it's worth, when pulling the cam pulley bolts (torqued to only 80 ft-lbs vs 217 ft-lbs) my brother and I were using a similar setup (about 4' from the bolt, he on one side with the pulley holder and me on the other with the wrench) and we ended up both with our full body weight on the bar and eventually bouncing a little bit before that bolt broke loose; we're both around 200 lbs.

I had much better luck with the breaker bar approach than my impact (though it's a cheapo Northern Tool unit that only does 200-300 ft-lbs).

If that doesn't work, heat the bolt with a torch or something, and try the breaker bar again. If it was a new Toyota bolt (which you should always use) there's some lock-tite type coating on the threads and the heat can help break that bond.

 

Running a larger hose to your impact will actually help a lot.

Soak it in Pb-blaster over night and try to take it off early in the morning when its cold.

 

This is definitely no ordinary "my crank bolt is stuck" situation!! Wow...

Took the engine to a local auto shop...the guy put on an 1100+lb torque impact....nothing.

So then we got 2 breaker bars, each about 5 feet....and had 2 grown men on each side.....NOTHING even budged (or even broke).

Today I'm taking it to a diesel shop (work on dump trucks and stuff). They have a 1" impact they said they could prob take it off with.

 

Yes hit it with the one inch impact and break the bolt off .

Now your fixing the crank or buying a new one and putting it all together.

During all this time has anyone given the head of the bolt a few hits with a punch and small hammer say 16 ounce .

Was taught this a long time ago by a blacksmith. Great on stubborn thermostat bolts.

 

Finally got it off!

They tried hitting it with a 3/4th impact for about 20seconds. It didn't budge.

Hooked it up to a 1" and it still took a few clicks, but eventually popped loose.


Pretty crazy.

 

Oh wow, I thought I was the only one (besides my old man) that did that. It's amazing how frequently that works!

 

Glad you got it broke loose with no damage.