Engine Rebuilding — Custom Performance
Expert performance rebuilding powered by Gene's Engine Service. We offer porting, 3/5-angle valve jobs, balancing, and boring for high-horsepower builds using reman short/long blocks or head rebuilds. By appointment only for undivided expert attention. Call now to schedule.
Custom performance engine rebuilding at Apex Automotive in Gilbert, AZ, is more than just a repair — it’s a precision craft honed by decades of experience from David Sr. and David Jr., who specialize in engine rebuilding as a dedicated focus, not a sideline. Custom performance rebuilds involve restoring and upgrading your engine to unlock higher horsepower, improved torque, and enhanced reliability, especially important in harsh desert conditions where heat and dust place additional stress on engine components.
Your engine is a complex assembly of pistons, valves, camshafts, and crankshafts, all working in harmony to convert fuel into motion. Performance rebuilding requires meticulous disassembly, cleaning, and inspection of critical parts, often followed by machining processes like boring cylinders and porting cylinder heads to improve airflow. Using expert relationships with machine shops like Gene’s Engine Service, we offer services such as three- and five-angle valve jobs that optimize valve seating for better combustion efficiency.
David Jr. approaches every rebuild with a diagnostic-first mindset, starting with a detailed consultation and thorough OBD-II scanning to analyze fault codes and live engine data. This ensures that we understand the root causes of your engine’s issues rather than guessing or replacing parts unnecessarily. Common failure modes in performance engines include worn piston rings causing loss of compression, valve seat recession, and crankshaft bearing wear — all of which can be exacerbated by Arizona’s high temperatures that increase thermal expansion and oil breakdown.
For GM engine families like the 5.3L and 6.2L V8s, known for Active Fuel Management (AFM) or Displacement On Demand (DOD) lifter failures, we provide EFI conversions using Holley or FiTech systems to improve fuel delivery and reliability. We also offer walnut blasting to remove carbon buildup in GDI engines, a frequent issue in desert climates where dust and heat accelerate deposit formation.
Our custom performance rebuilds include precision balancing of rotating assemblies, use of remanufactured short or long blocks, and thorough final assembly with torque specs verified at every step. By appointment only, we dedicate the necessary time and expertise to ensure your engine performs at its peak, delivering power, longevity, and peace of mind for Arizona’s demanding driving environment.