Focus L4-2.3L VIN Z (2003)
Valve: Specifications
Valve
Valve head diameter
intake ................................................................................................................................................................. 34.85 - 35.15 mm (1.372 - 1.383 in.)
exhaust ............................................................................................................................................................... 29.85 - 30.15 mm (1.175 - 1.187 in.)
Valve stem diameter
intake ............................................................................................................................................................. 5.470 - 5.485 mm (0.2153 - 0.2159 in.)
exhaust ........................................................................................................................................................... 5.465 - 5.480 mm (0.2151 - 0.2157 in.)
Valve stem-to-guide clearance
intake ...................................................................................................................................................................................... 0.0027 mm (0.0009 in.)
exhaust .................................................................................................................................................................................... 0.0029 mm (0.0011 in.)
Valve face runout ............................................................................................................................................................................... 0.05 mm (0.001 in.)
Valve face angle ................................................................................................................................................................................................ 45 degrees
Valve Spring
Compression Pressure
Intake and exhaust (installed) ..................................................................................................................................................................... 38.667 lbs.
Intake (valve open) 8.9 mm (0.35 in.) of lift ............................................................................................................................................. 97.032 lbs.
Exhaust (valve open) 7.4 mm of lift ........................................................................................................................................................... 93.338 lbs.
Free length ........................................................................................................................................................................................ 44.92 mm (1.768 in.)
Assembled height ............................................................................................................................................................................... 37.9 mm (1.492 in.)
