Engine Air Valve Holder Pressure Pipe With Ball Valve M12 M14 To Quarter Inch NPT For Valve Spring Replacement And Cylinder Leak Testing In Ford Mustang LS1 LS2 LS3 4.8 5.3 6.0 Gasoline Engines And Trucks
✔️ M12/M14 threads to 1/4 NPT, 30 to 110 psi working range
Engine air valve holder pressure pipe with ball valve is an accessory designed for LS family gasoline engines to aid valve spring replacement and cylinder leak testing. It connects at the spark plug port (M12/M14) and uses a 1/4 NPT quick-connect for the air line. This tool lets you safely pressurize the cylinder and pinpoint leaks by listening for air escapes or feeling pressure changes. Note: Spark plug must be removed prior to installation. The working pressure is 30 to 110 psi (2 to 8 bar). It is not intended for diesel engines, and the 4500 psi marking on the pipe is a maximum burst rating, not the working pressure.
✅ Fits GM LS family gasoline engines (LS1/LS2/LS3, 4.8/5.3/6.0) and trucks
✅ M12/M14 spark plug ports and 1/4 NPT air line quick-connect
✅ Working pressure 30 to 110 psi (2 to 8 bar); 4500 psi mark is not the working pressure
✅ High-quality rubber hose with brass joints for wear resistance and corrosion protection
✅ Includes 1x engine air valve bracket and pressure pipe with ball valve
✅ Spark plug must be removed before installation
💡 What is an engine air valve holder pressure pipe used for in cylinder leak testing and valve spring replacement? This handy tool helps diagnose leaks and verify valve seating under controlled air pressure. - Helps locate exhaust or throttle leaks while the valve is held closed - Enables quick, handy testing during valve spring replacement - Works with LS engines and spark plug ports using M12/M14 threads and 1/4 NPT connections - Safe, simple setup with a 30 to 110 psi testing range