Altima SE L4-2.4L (KA24DE) (1997)
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Valve Seat: Specifications
Cylinder Head Seat Recess Diameter [D]
Standard
Intake ...................................................................................................................................................... 37.500 - 37.516 mm (1.4764 - 1.4770 inch)
Exhaust ................................................................................................................................................... 32.200 - 32.216 mm (1.2677 - 1.2683 inch)
Service
Intake ...................................................................................................................................................... 38.000 - 38.016 mm (1.4961 - 1.4967 inch)
Exhaust ................................................................................................................................................... 32.700 - 32.716 mm (1.2874 - 1.2880 inch)
Valve Seat Interference Fit
Intake and Exhaust ........................................................................................................................................... 0.064 - 0.096 mm (0.0025 - 0.0038 inch)
Valve Seat Outer Diameter [d]
Standard
Intake ...................................................................................................................................................... 37.580 - 37.596 mm (1.4795 - 1.4802 inch)
Exhaust ................................................................................................................................................... 32.280 - 32.296 mm (1.2709 - 1.2715 inch)
Service
Intake ...................................................................................................................................................... 38.080 - 38.096 mm (1.4992 - 1.4998 inch)
Exhaust ................................................................................................................................................... 32.780 - 32.796 mm (1.2905 - 1.2912 inch)
Depth [H]
Intake and Exhaust ....................................................................................................................................................... 6.1 - 6.3 mm (0.240 - 0.248 inch)
Height [h1]
Standard
Intake ...................................................................................................................................................................... 5.8 - 6.0 mm (0.228 - 0.236 inch)
Intake ...................................................................................................................................................................... 5.9 - 6.0 mm (0.232 - 0.236 inch)
Exhaust ................................................................................................................................................................... 5.9 - 6.0 mm (0.232 - 0.236 inch)
Service
Intake ...................................................................................................................................................................... 5.3 - 5.5 mm (0.209 - 0.217 inch)
Exhaust ........................................................................................................................................................... 5.32 - 5.42 mm (0.2094 - 0.2134 inch)
Height [h2]
Intake .................................................................................................................................................................... 0.24 - 0.64 mm (0.0094 - 0.0252 inch)
Intake .................................................................................................................................................................... 0.34 - 0.64 mm (0.0134 - 0.0252 inch)
Exhaust ................................................................................................................................................................. 0.43 - 0.73 mm (0.0169 - 0.0287 inch)