DIY's half-hour series, Weekend Mechanic, gears up to offer expert advice, tips and step-by-step instruction for tackling moderate to major automotive repairs and upgrades in just one weekend. Master mechanic Bruce Bonebrake covers the types of projects that could take an accomplished do-it-yourselfer an entire weekend -- or more -- to complete. Topics include head-gasket replacement, lift-kit installation, small-engine rebuilding and go-kart construction from the ground up.