keep going with the penetrating oil but use something better than wd40. ambersil or plusgas maybe. leave it as long as you can at least 3 nights worth of application. Then wrap the crank in thick rags hold it horizontally in a vice, get a decent spanner on the pedal thread and hit it with a big hammer.
keep going with the penetrating oil but use something better than wd40. ambersil or plusgas maybe. leave it as long as you can at least 3 nights worth of application. Then wrap the crank in thick rags hold it horizontally in a vice, get a decent spanner on the pedal thread and hit it with a big hammer.