What Impact Wrench Nm You Use To Open Rusted Bolts

[SKY 34]

hi,

recently bought myself a 2hp compressor, wondering what impact wrench would you use to open badly rusted high tension bolts on the exhaust.

been trying all sorts of method still won't budge...atm I'm using a 90Nm standard wrench. looking to buy about 300Nm, will that do?

the hp rating does it basically means the rate in which the compressor tank is going to be filled? the larger the faster the tank the more air compressed hence more powerfull tool can be used?

the 300Nm impact wrech I mentioned requires 2.5hp and I've got only 2.....so does it mean the the compressor will be on more frequently charging the loss air?

thanks

[blind_elk]

I would expect 300Nm will spin you the opposite direction.

I would suggest a socket and breaker bar as the safest way to do this.

Failing that, long ring spanners. Get a piece of pipe to fit over the spanner / breaker bar to increase the leverage.

LOTS of WD-40 (or similar).

[(B1) MR_fanny]

i second that. has always worked for me

[Sumo]

Put some muscle into it son.

I also check tension after using a rattle gun and nuts/bolts I have done up with it.

Cheers

Sumo

[turboedsloth]

i concur with the first 2 repliers. lotsa of crc an maybe a tiny bit of heat

[MANWHORE]

Agreed about socket and breaker bar.

With a decent breaker bar, you should be able to either undo it, or snap the bolt.

The impact wrenches go psycho on the bolt and might actually make the bolt snap when it might not have.

[R33S2]

Or round the head of a rusty surface, even worse trouble then.

[wrxhoon]

hi,

recently bought myself a 2hp compressor, wondering what impact wrench would you use to open badly rusted high tension bolts on the exhaust.

been trying all sorts of method still won't budge...atm I'm using a 90Nm standard wrench. looking to buy about 300Nm, will that do?

the hp rating does it basically means the rate in which the compressor tank is going to be filled? the larger the faster the tank the more air compressed hence more powerfull tool can be used?

the 300Nm impact wrech I mentioned requires 2.5hp and I've got only 2.....so does it mean the the compressor will be on more frequently charging the loss air?

thanks

You don't use rattle guns because the bolts/nuts are to tight or to hard to undo . You use them because you want to do a quick job or because you can't hold it , like a wheel nut ( wheels of the ground) or a harmonic balancer.

It will be very hard to get the rattle gun on to your exhaust nuts too. It will be very easy to snap the old exhaust studs with a small bar, if they are hard to move apply some heat on to them with the oxy, it works every time. If you don't have oxy you can use a big L.P, gas torch to get it as hot as possible or use WD40 but carefull WD40 will catch alight!!!

[killabeez]

yeah I had a crank pulley bolt which had red (permanent locktite) on it and done up with a rattle gun, couldnt get it off no matter what, ended up getting a LP blowtorch from bunnings for $20, heated it for 15 mins and came off nice and easy.

[MBS206]

Loctite breaks down under heat. Hence the ease...

Also, a rattle gun is NOT the tightest nut doer up there out!

Most 3/4" drive breaking bars can do a nut up tighter then a rattle gun.

If you can't heat it from outside, heat it from inside... (RUN THE CAR!) Watch out, you might get burnt...

But a good breaking bar, and turning it the correct way, will most likely get you off (You can also try tightening by a small little iddy bit before loosening...)