Crank Pulley Bolt

[mrprogrock]

If I get an impact wrench to remove the crank pulley bolt, what kind of ft-lbs torque will I need to be able to break it loose? I know the Haynes manual says to tighten it to something like 123ft-lbs torque, but I am assuming it will take a good bit more than that to break it loose.

Oops...forgot to mention...its a 1994 3.2L V6

[Cat Fuzz]

You average 1/2 inch drive air impact should zap it right off without a problem.

[79batmobile]

You picked a good one. It took quite a few different methods to break that bolt loose with the main result being busted knuckles but I finally got some other muscle to help me. Unless my bolt was just stuck on there more thank is usual I think they are all hard. First soak it down in something to help break it loose easier. I swear by PB blaster....it's the best. Then take a pipe wrech and open it as far as it will go. The one I had opened about three inches which was enough. Now between the belt valley on the front of the pulley and the belt valleys on the back of the pully is an odd shaped peice with two holes in it. That is the best place to get a grip with the pipe wrench. Then using a breaker bar with a pipe as a cheater bar, sticking of the end about a foot to a foot and half be prepared to lay on that bolt. Another thing is to make sure you have the right socket. It's a 24mm I think or thereabouts. you don't want to ruin this bolt. It took me and my dad hauling on this thing for about five minutes before it finally gave and I got my arm torn up cause it came off so suddenly. So be ready. I also have the 3.2L its just in 95 instead. I have an impact wrench that supposedly makes 250ft/lbs but I couldn't get it off with that. I think it also may be my compressor...it's kinda small so it may not be putting out all the torque available.

Anyway that was too long
Good luck

[Cat Fuzz]

Most air impacts need a constant 90 psi to get max torque. Some impacts are more powerful than others too.

[mrprogrock]

Yes, thank you all for replying. I'm about to get my hands on an impact wrench with 450 ft. lbs of torque...so that ought to do it. AS far as air compressors go, the PSi is important, but also the SCFM ( amount of air delivery) is very important too.