If you're able to lift/inflate the suspension airbags on your vehicle to the highest off-road setting you may be able to wriggle the liner out.
Remove the 10mm nuts, the 8mm screws and the plastic push clips.
Then, if you start at the rear of the liner where it "folds" flat under the floor and begin removing there and peel it forward, you may be able to gain enough access to to the firewall to save removing the entire liner.
To prevent the vehicle from dropping once you begin your swap out of the valve, PLACE A COUPLE OF SHOP STANDS UNDER THE VEHICLE BEFORE YOU BEGIN UNDOING THE VALVE FITTINGS.
Rob
Remove the 10mm nuts, the 8mm screws and the plastic push clips.
Then, if you start at the rear of the liner where it "folds" flat under the floor and begin removing there and peel it forward, you may be able to gain enough access to to the firewall to save removing the entire liner.
To prevent the vehicle from dropping once you begin your swap out of the valve, PLACE A COUPLE OF SHOP STANDS UNDER THE VEHICLE BEFORE YOU BEGIN UNDOING THE VALVE FITTINGS.
Rob