I stand the barrel in the workshop oven at 150°C and wait for the thud and clatter when the barrel slides down the liners. These can then be wiggled out completely quite easily. Sometimes it simply doesn't work...
First of all, obtain a pair of fire/heat-proof gloves, excellent ones knitted from Kevlar thread are available from Sparco.
Heat the bugger to around 200°C. Set up a couple of 4x2s so you can place the hot cylinder block across them without obstructing the liners, preferably outdoors (a lot easier if the studs to the head are removed). Set your garden hose nozzle to a fine conical spray and turn on the tap. Set the hot cylinder on the wooden blocks with the head side down. Spray the inside of the liner with water, with a little luck, the liner simply falls out... simple physics. If that still doesn't do the trick, make an alloy plug that fits in the bottom of the liner and drive it out of the hot casting, either with a hammer or a hydraulic press. This can damage the liner if you're not careful!
Stubborn liners are usually contaminated with burnt oil that has found its way between liner and casting. Apart from glueing the liner to the casting, it can also hamper cooling to a point that a piston can sieze due to local overheating.
piet
