85' U1300L Holset Turbo VA A/C, 66' Propane 404.1 rock mog, 1975 416 Doka, G500, Volvo C303
insert and twist. Its pretty hard. I would guess they expand the main spring at the factory. I just started to torch mine out on the 404 cause it wasent worth the time to coil them out, but since your trying to go the other way your kinda stuck.