Remove stubborn bolt

[Garett]

I’ve never been stuck by a stubborn crankshaft bolt. Yesterday I took the vehicle off the lift, rolled it beside my compressor room. With. 6 foot airline hooked straight to the tank neither of my IR impact guns would budge this Toyota 22mm crank pulley bolt. I did some online searching and found Lisle and IR make high mass impact sockets. It’s like swinging a big hammer vs a small one. Nobody had one in town so I started adding wheel weights to a 22mm deep socket, and what do you know it worked!! Have a look, lol. Next time I encounter this I’ll know what to do.

 

[didit]

Great tip, thanks for sharing! I could have used that knowledge a few times.

 

[danielbuck]

great tip indeed!

 

[Tallpilot]

Nice tip! F=ma

 

[The Cobbler]

so is it just the extra mass & weight that helps move the bolt?

 

[pizza]

it's extra mass located away from the rotational axis. the farther, the better. the effect is proportional to the square of the distance.
https://en.wikipedia.org/wiki/Moment_of_inertia

this exaggerated design drives the point home. though the outer edge is just a thin hoop, that bit of material contributes a lot due to its distance from the axis.

 

[paulsomlo]

Just went through this with my BMW - started with a short 22mm, wouldn't budge. Changed to a long 22mm, voila. And this was with the medium torque IR cordless - I have the high torque IR, but couldn't fit it, because I didn't want to take out the radiator.

 

[Mick56]

Ingenious!

 

[OneDollarSaab]

That's what God make 3/4" drive tools for

 

[M635_Guy]

Necessity yadda yadda

Cool idea!

 

[vjquan]

Bump start method.

 

[Garett]

Bump start method.

I tried it, the starter was too weak and there wasn’t enough rotation available to allow the engine to fire. Had my buddy bump the ignition as I leaned on the end of the breaker bar with a long 2x4, the last thing I needed would have been a rounded head bolt.

 

[clubairth]

Yes I use the starter bump method and it seems to work with little effort.
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