Grand Cherokee 2WD L6-242 4.0L VIN S MFI (1993)
Camshaft: Specifications
CAMSHAFT
Hydraulic Tappet Clearance ............................................................................................................................................................................... Zero Lash
Bearing Clearance ....................................................................................................................................................... 0.025 0.076 mm (0.001 .0.003 in.)
Bearing Journal Diameter
No.1 ........................................................................................................................................................................... 51.54-51.56 mm (2.029 - 2.030 in.)
No.2 ........................................................................................................................................................................... 51.28-51.31 mm (2.019 - 2.020 in.)
No.3 ........................................................................................................................................................................... 51.03-51.05 mm (2.009 - 2.010 in.)
No.4 ............................................................................................................................................................................ 50.78-50.80 mm (1.999- 2.000 in.)
Base Circle Runout ........................................................................................................................................................ 0.03 mm- max. (0.001 in. - max.)
Camshaft Lobe Lift ............................................................................................................................................................................. 6.43 mm (0.253 in.)
Valve Lift ......................................................................................................................................................................................... 10.29 mm (0.405 in.)
Intake Valve Timing
Opens ................................................................................................................................................................................................................. 15°BTDC
Closes ................................................................................................................................................................................................................ 75°ABDC
Exhaust Valve Timing
Opens ................................................................................................................................................................................................................. 59°BBDC
Closes ................................................................................................................................................................................................................. 31°ATDC
Valve Overlap ............................................................................................................................................................................................................... 46°
Intake Duration ........................................................................................................................................................................................................... 270°
Exhaust Duration ........................................................................................................................................................................................................ 270°
