Equipped with a full on-site machine shop since 1994, Thao Auto Repair at 3400 El Cajon Blvd handles engine work that most North Park general-repair shops send out. Exhaust system fabrication and muffler replacement beyond the shop’s scope can be coordinated with AM Mufflers & Tires on El Cajon Blvd. The operation covers brake and suspension service, A/C compressor swaps, transmission rebuilds, axle replacement, and check-engine-light diagnostics across all domestic and import makes. Body panel repair and bumper refinishing that follow mechanical work can be handled by Car One Zone Service Inc on El Cajon Blvd. The shop’s core capability is complete engine block boring, crankshaft grinding, and cylinder head resurfacing performed entirely in-house without outsourcing to a third-party machinist.