Dakota 2WD V8-5.9L VIN Z (1998)
Valve: Specifications
Face Angle ..................................................................................................................................................................................................... 43.25° - 43.75°
Head Diameter - Intake ...................................................................................................................................................................... 47.752 mm (1.88 inch)
Head Diameter - Exhaust ........................................................................................................................................................................ 41.072 (1.617 inch)
Length (Overall) - Intake ....................................................................................................................................... 126.21 - 126.85 mm (4.969 - 4.994 inch)
Length (Overall) - Exhaust .................................................................................................................................... 126.44 - 127.30 mm (4.978 - 5.012 inch)
Lift (@ Zero Lash) - Intake ............................................................................................................................................................... 10.414 mm (0.410 inch)
Lift (@ Zero Lash) - Exhaust ........................................................................................................................................................... 10.592 mm (0.417 inch)
Stem Diameter - Intake .............................................................................................................................................. 9.449 - 9.474 mm (0.372 - 0.373 inch)
Stem Diameter - Exhaust ........................................................................................................................................... 9.423 - 9.449 mm (0.371 - 0.372 inch)
Guide Bore ............................................................................................................................................................... 9.500 - 9.525 mm (0.374 - 0.375 inch)
Stem to Guide Clearance Intake............................................................................................................................ 0.0254 - 0.0762 mm (0.001 - 0..003 inch)
Stem to Guide Clearance Exhaust .......................................................................................................................... 0.0508- 0.1016 mm (0.002 - 0.004 inch)
Service Limit .......................................................................................................................................................................................... 0.4318 (0.017 inch)
Exhaust Valve
Closes (ATDC) ................................................................................................................................................................................................................. 33°
Opens (BBDC) ................................................................................................................................................................................................................. 56°
Duration .......................................................................................................................................................................................................................... 269°
Intake Valve
Closes (ATDC) ................................................................................................................................................................................................................. 62°
Opens (BBDC) ................................................................................................................................................................................................................... 7°
Duration .......................................................................................................................................................................................................................... 249°
Valve Overlap .................................................................................................................................................................................................................. 41°
