shubonker

I took off the crank bolt on the left side relatively easy but the one on the right side/ drivedrain side is really stubborn and i can't seem to get it to budge... any advice?

I nearly caught a hernia trying to undo the bolt.

Fredmertz51

I got a frame in the garage with the drive-side crankarm bolt frozen. I couldn't move it. Took it to the LBS, they shrugged their shoulders. Put an impact wrench on it and rounded out the Allen Bolt. Burnt up $25 worth of high-carbon drill bits trying to drill the bolt. Not enough room to get a hacksaw blade between the crankarm and the bottom bracket shell. Good Luck.

DannoXYZ 

Use an automotive-style ratchet-wrench with 10-12" handle. You'll need little force to free up that bolt. It's usually not a good idea to use the excessive forces needed on small wrenches because you'll end up slipping or twisting the wrench, leading to stripped-out heads on the bolts. A large wrench will let you apply the necessary torque without any wiggling forces.

MudPie

Not sure if you have regular hex bolt head or socket (Allen) style, but make sure you use a good qualilty tool, like Craftsman brand. It may take a lot of torque to remove, but with good quality tools, a long enough handle you should be able to remove it. As DannoXYZ said, automtive size tools are necessary here.

Penetrating oil might help too (like liquid wrench or PB Blaster) but make sure the penetrating fluid doesn't reach the bottom bracket bearings.

HillRider

You do realize that crank fixing bolts on both sides are right-hand threaded? Unlike bottom bracket cups, they both loosen counter clockwise.

Any chance you were trying to remove it as if it had left-hand threads like a drive-side bb cup?

operator

What kind of a tool are you using

shubonker

Yes i realize they loosening counterclockwise. I'm using a small ratchet tool, guess i need to get a bigger one. I'll try a bigger one and see if it works. Thanks guys.

abirduphigh

If you have a long piece of metal pipe, or even a spare front fork, you can slip it onto the arm of the wrench to achieve much more leverage on the tool. And as mudpie mentioned, try some liquid wrench on that sucker.