Stuck/fused pedals. What’s the solution?

[The History Man]

A pair of crank arms. Nice. But nasty caged type vp/wellgo pedals well and truly stuck in them. Probably 25+ years of stuck.

what’s the solution? Currently soaking in a pool of plusgas in the backs of the threads. Hoping it’ll work down into them.

Anything. Thank you Please.

 

[marc two tone]

I'm not big on chemicals that wont penetrate the impenetrable. Should it be that solid.
Thermal shock and brute force.
Blowtorch then spanner force with improvised leverage.
Cold too with the plumbers pipe freeze followed by improvised leverage.

Various ways of going about it.

 

[mdvineng]

Heat n cold cycles, big hammer followed by new ones and probably including the arms

 

[mk one]

Yep, im with the more leverage method, extend the spanner.

 

[The History Man]

So, stick them in the freezer overnight, then boiling water on arms?

 

[The History Man]

Yep, im with the more leverage method, extend the spanner.

I have already moved the workbench using a pole over spanner. .

 

[Hotwheels.]

Alcohol is a solution.

 

[The History Man]

Alcohol is a solution.

Set fire to them?

 

[Hotwheels.]

Set fire to them?

Maybe worth a shot, you’ve tried everything else.

 

[Stratoblaster]

I just went through this on a 90 Klein Attitude. The pedals were original XT and probably had been in the original XT arms since 1990. I pulled the arms and soaked the pedals from the back with PB Blaster (penetrating oil). I hit the pedal spindle with some heat on the backside. Finally I put an allen wrench in my vise and used the leverage of the crank arm to turn the pedal off. I might have even used a cheater bar on the crank arm. Be sure you are turning the right direction. Right drive arm, right hand thread, left non-drive arm, left hand thread. Even knowing direction can be confusing depending how how you are looking (front or back) at the arm.

Edit: thinking more about it... I had to give up on the allen wrench and I used a regular open end wrench (spanner to y'all) held in the vise and turned the crank arm.