To remove and install a tire, first park the vehicle on level ground and assemble the jack, tire iron and spare tire, if necessary. Position the jack appropriately and remove the lug nut trim caps if any. For vehicles that have a wheel cover or hub cap, use the tire iron to pry it off. Engage the parking brake and lock a diagonally opposite wheel with chocks (this can be bought or made from wood). For automatic transmissions, push the selector in Park and for manual, move to Reverse. With the tires on the ground, loosen the lug nuts with the tire iron, being careful not to expose nuts stuck from the heat as it may damage the wheel. If needed, a few heavy hammer blows on the bolt may help to loosen rusted nuts. Raise the vehicle with the jack until the tire is off the ground and put it on jackstands. Remove the lug nuts and remove the tire and wheel assembly. For installation, be sure to clean the mating surfaces and lug studs of rust. Install the tire and wheel assembly, hand tightening the lug nuts before tightening them with the tire wrench in a crisscross pattern. Raise the vehicle, remove jack stands and lower the vehicle. Use a torque wrench to tighten the lug nuts using the specified torque in a crisscross pattern. If applicable, attach the wheel cover or hub cap making sure to leave the valve stem in place. Reinstall any lug nut trim caps and place the jack and tire iron in their compartments and remove the wheel chocks. If a flat or damaged tyre was removed put it in the vehicle for repair or replacement. For inspection, examine the tires for lacerations, punctures, and sharp objects and examine treadwear and air pressure. In addition, check the wheel assemblies for dents, cracks, rust, and metal fatigue and repair or replace as needed.