Quick look at the pistons: they have very few marks on their side but are quite sooty. I guess they were quite carbonned up, even though the mileage wasn't high. I sprayed WD40 into the barrels several times over the years to stop any corrosion and that's a good way to loosen up the deposits. They are very soft now.
To get the crank out it was necessary to take off pistons 1 and 4.
