Stuck Pedals

Wouldn't this cause the pedal shaft (and thread) to very slightly expand making it even tighter ?

I thought you would want to heat the end of the crank ?

The expansion and subsiquent contraction is usually what breaks the seized thread, and if they are made of different metals they will expand and contract at different rates. No guarantee that it will work but it has helped me many times in the past.

The expansion and subsiquent contraction is usually what breaks the seized thread, and if they are made of different metals they will expand and contract at different rates. No guarantee that it will work but it has helped me many times in the past.

Ah! gotcha, makes sense now, cheers for the explanation.

Sometimes a lot of wd40 left to soak helps with stuck pedals :-)

All the above is good advice, plus use a toe strap to attach the opposite crank to the chain stay. This gives you something rigid to work against and may save your knuckles from a trashing on the chain ring

All the above is good advice, plus use a toe strap to attach the opposite crank to the chain stay. This gives you something rigid to work against and may save your knuckles from a trashing on the chain ring

+1 for that, I have used a suitable sized block of 3"x3" jammed under the opposite pedal too.

One - Pedal spanner
Two - Ram the other pedal/crank arm side under the bed (One on it's own didn't work)
Three - HTFU

Done!
Ta to all for the good advice.

So are they off then? When you fit new make sure you use Copperease on the threads or something similar and dont be a gorilla with the tightening up of the new ones. I used to wrench everything tight then find a week later you need to take it back off. With pedals I do them right up finger tight then just a light nip with the hex key or spanner.

Yep they off. Ta for the advice.

They were put on originally by the lbs when they changed my cranks over. They're usually top drawer, so reckon they just forgot to grease before putting them on.

if they are of different metals then I think there is a tiny electrical charge produced btwn them, something to do with the Ignoble Chart if I remember correctly???? If I'm wrong I'm sure someone on here will love to correct me.

Right hand drive side, Look Keo pedal, stuck.
Tried:

1. One person sat on bike while other pulls wrench upward on inside.
   
2. Bike upside down hold cranks at 3 and 9 o'clock and push down
   
3. Push pedal with wrench attached down into raised bricks to push wrench upward
   
4. Lubricant sprays
   
5. Heating crank arm
   
6. Extending the wrench lever length
   All resulted in no movement.
   
   

Running out of ideas. Anyone got any more?
Thinking about trying to over-tighten the pedal further to see if it pops it too far and slightly looser.

Right hand pedal, but you're turning the wrench clockwise? That's the direction to tighten it...

.

I'm not turning the pedal clockwise.

take the crank arm off, put the pedal spanner or what ever you are using on it and stand on which ever part gives you the best leverage or give it a big wallop with a mallet.

thats what i have done several times on tough pedals and its not failed yet. should it not work though i would put a bit of scaffold pole on the spanner and try holding the crank steady and undo it that way. or another thing to try, put the crank arm and spanner in a vice if possible and give it some that way. cant imagine that would fail, you would have shit loads of pressure going to it, it would have to give.

ultimately i would check youre undoing it the right way before going any further.

^ this. Vice + quality pedal wrench (or allen key - I didn't think Keos had flats?) + long cheater bar. If it doesn't come off burn the whole lot with fire.

Yes, it's 8mm hex allen wrench for the Keo, which is making it more difficult because there's less space to manoeuvre on the inside than on outside of arm.
The way things are going it wouldn't catch fire.

In absence of a vice, position the crank arm on a curb so that when undoing the pedal the crank arm will push into the curb. Wrap in a towel if you are bothered about scratching the arm. Then use friend to brace the bike. Apply quality allen bit attached to large ratchet wrench. Success!

Been using a low wall for a better angle than the kerb, and it's still on!

Either your wrench is too short, you are too weak, or it's time to kill it in the face with fire.

You do realize, when it's the right pedal and you would turn it counter clockwise to get it out with a spanner, that you have to turn it clockwise with the allen key to get it loose?

Yes.

I'm going to hit the weights and try again.

i might be embarrassingly wrong here due to not knowing my left and right very well (true story) but if youre doing this from the inside with the allen key and not the outside - shouldnt you be turning clockwise?

Yeah, obviously it depends on what side of the 'clock face' you are working on :) The easy way to remember is just turn the wrench or whatever towards the back of the bike to remove, towards the front to tighten. Bingo :)

yeh thats how i remember these things like pedals, BB etc, the front to do up the back to undo. so if hes attacking this from the back of the crank with an allen key, it should be going clockwise, right?

its just he said up there - "I'm not turning the pedal clockwise."

please correct me if i have got the wrong end of the stick.