Upgrading my Look pedals from Keo Classic to Keo 2 Max Carbon .
Original pedals have not been removed in 3 years and cannot seem to move them .I am aware of the clock/counter thread .
Any tips from the top wrenches out there ?
keep the bike on the ground. Use a long pedal wrench- or add some sort of longer lever to it. all else fails use a hammer.
Put the bike on ground in the highest gear, have an assistant hold the bike and brakes and set the cranks horizontal along with the pedal wrench and wack the shit out of the wrench with a dead blow hammer. Next time grease the threads before installation.
+2 on sticking the chain in the big ring, whatever method you use.
Can make the difference between scraping your knuckles and a visit to the ER.
The Park big, long ,blue pedal wrench is your friend. Best tool I ever bought.
Apply some oil to the thread area and leave it sit over night. It “may” loosen the threads. You still may need to hit the wrench with a RUBBER MALLET!! Don’t use a hammer. If all else fails remove the crankset before going any further so you don’t ruin your frame or the bb area. Place the crank arms in a vise (wrap the arms in a towel) and work on them that way using the same methods as above.
Can’t remember if the Look Classics take a hex key on the spindle but if they do, you can go nuclear on them. I must confess to getting pissed off enough at my pedals on occasion to fire up the air compressor and hit them with my impact wrench. Crazy, and risky, but it works 
**Apply some oil to the thread area and leave it sit over night. It “may” loosen the threads. You still may need to hit the wrench with a RUBBER MALLET!! Don’t use a hammer. ** If all else fails remove the crankset before going any further so you don’t ruin your frame or the bb area. Place the crank arms in a vise (wrap the arms in a towel) and work on them that way using the same methods as above.
This! Pouring hot water on the said area may help a bit too.
Leverage is much better than brute force in this situation.
Keo Classic uses an 8mm hex in the pedal spindle. Use a long L-Allen 8mm (I prefer using one without the handle for this situation) to remove pedal. I normally have the bike on the ground so I can use my body weight. If you still cant get it try using a length of pipe over the wrench to provide extra leverage. Ease the pedal off, do not bash it off!
hex key with a large adjustable wrench will work, i have cussed the design many times while removing pedals
darryl
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Interesting that people have so much trouble with this, I seem to find getting the look pedals off, much easier then using a pedal wrench on traditional pedals.
It’s probably a hard core carcinogen, but I swear by PB Blaster. If that stuff won’t break it loose, pretty much nothing will.
Slide a metel broom handle or metal tube over the hex wrench to get as much leverage as you need.
Find a reasonably priced time machine on e-bay.
Go three years back in time.
Grease the threads of the pedals before you fit them.
Take time machine back to today.
Remove the pedals.
Done!
One of my once a year maintenance items is to remove the pedals, clean the threads, grease them, and put the pedals back on.