Brought Vectra seats for my Astra a month ago and really keen to replace the front seats. Finally got the right bit to remove the bolts. Removed the seatbelt bolt, no problem. Removed the rear 2 "outboard" bolts - the ones nearest to the side of the car - on both seats. Removed the 4 plastic tabs. But the "inboard" rear bolts (nearest to centre console) are being a right b*tch - it starts turning for quarter a turn then stops completely solid - it won't turn in either direction. I've used a lot of WD40. I'm using the correct bit - T40 with a 1/2" drive socket spanner with all my weight on the spanner directly above the bolt but the spanner keep slipping/popping out despite that the bit is a snug fit.
How best to remove those 2 bolts? Keep in mind, they both won't turn in either direction.