Yes it can be done in situ.
The correct way is to use a liner puller which consists of a round dolly that is a perfect fit into the bottom of the liner but with a lip to catch the edge and with a hole in the centre to put a threaded rod through with a nut on the bottom and then a bridge piece above the block ,also with a centre hole for the threaded rod and a nut to wind the liner out.
Or,with no expense involved,a piece of good hardwood against the bottom of the liner and keep whacking it vertically with a hammer should bring it up out. You might find that the bottom groove in the block that the rubber seal fits into has corroded away... unless good antifreeze with corrosion inhibitor has been kept maintained in the cooling system...
The correct way is to use a liner puller which consists of a round dolly that is a perfect fit into the bottom of the liner but with a lip to catch the edge and with a hole in the centre to put a threaded rod through with a nut on the bottom and then a bridge piece above the block ,also with a centre hole for the threaded rod and a nut to wind the liner out.
Or,with no expense involved,a piece of good hardwood against the bottom of the liner and keep whacking it vertically with a hammer should bring it up out. You might find that the bottom groove in the block that the rubber seal fits into has corroded away... unless good antifreeze with corrosion inhibitor has been kept maintained in the cooling system...