crank sprocket removal :_(

[jt15833]

in the process of replacing my oil pump I'm trying to get this crank sprocket off. My first attempt was this morning, a friend of mine mig welded two 7/16ths bolts to opposite sides of the sprocket (between the teeth) and we used a pulley puller, but the bolt broke off taking one of the teeth with it. I went by home depot tonight and got a cobalt 5/16 drill bit, normal drill bit, and a 5/16-18 tap and some bolts, hopefully they will work better. Anyone have any tips for me, this is killin me!

[pulsar gtr]

I don't know why lots of people have hard time removing this sprocket, but I have removed it many times on many different ca16,ca18 and every time it works fine.

get yourself a two decent size crow bars, and jam them behind the sprocket opposite from each other, wiggle them with some force and the sprocket should come out, couple times that it actually gave me a bit of hard time, I took a torch and heated the sprocket but don't direct the heat to the crank, only the sprocket, then quick wiggle the crow bars and it will come out. I have heard of people jizzling the sprocket out. I guess what ever you feel comfortable doing.

GOOD LUCK,PULSAR GTRRafi

[biosehnsucht]

not surprised welding didn't work, would be hard to get a good weld that way

crowbars can be dangerous

I nearly lost a fingernail after punching the block when slipped off the crowbar

we had 2, each of us on a side, and the crowbars were bending.

we did eventually break the oil pump, but thats it..

other methods:- use a dremel to cut into the sprocket from the top (where the key is - this way if you "overshoot" you just mess up the key which is replaceable) and chisel/hammer break it apart; may also need to do the same on opposite side to weaken it sufficiently but just don't get close to the crank ( don't go all the way )

- use a pully puller, and drill/tap holes in the sprocket (as you are now about to try it seems), this is usually considered the "correct" way

and of course make sure you've already ordered a new sprocket from the dealer or such

[float_6969]

I'm with Rafi on this one. I've never had a problem with them. Most people seem to cut them in half and chisle them off. The better way would be to drill and tap the sprocket and use a pully press.