Obviously , you need to wear leather gloves or oven mits .
A u shaped piece of 1/8 steel , or more corectly a U cut in 1/8 steel or alumn. , IF youve got it up 1/4 ,
can be slid under liner flange , and ' pursuasion ' applied . A Dowl down the bore & a whack .
Likely oiling , pressing home again , might not be fatal . Gunks probly balled , going the 1/4 .
CRC / WD 40 , harras it periodically , a few days beween . Heating etc .
Dont distort anything with to much brute & not enough subtle .