Dodge RAM 1500 1998 Owner's Manual page 1417

9 - 194 ENGINE - 5.7L
ENGINE - 5.7L (Continued)
VALVE TIMING
DESCRIPTION
Intake
Opens (BTDC)
Closes (ATDC)
Exhaust
Opens (BTDC)
Closes (ATDC)
Duration
Valve Overlap
CYLINDER HEAD
DESCRIPTION
Valve Seat Angle
Valve Seat Runout (MAX)
Valve Seat Width (Finish)
Intake
Exhaust
Guide Bore Diameter
(Std.)
HYDRAULIC TAPPETS
DESCRIPTION
Body Diameter 21.387 - 21.405
Clearance (To 0.020 - 0.063
Bore)
Dry Lash 3.0 mm (at the
SPECIFICATION
7.0°
253.0°
233°
27°
253.70°
34°
SPECIFICATION
44.5° - 45.0°
0.05 mm (0.0019 in.)
1.018 - 1.62 mm
(0.0464 - 0.0637 in.)
1.48 - 1.92 mm
(0.0582 - 0.0755 in.)
7.975 - 8.00 mm
(0.313 - 0.314 in.)
SPECIFICATION
Metric Standard
0.8420 - 0.8427
mm in.
0.0007 - 0.0024
mm in.
0.1181 in.
valve)
VALVES
DESCRIPTION
Face Angle
Head Diameter
Intake
Exhaust
Length (Overall)
Intake
Exhaust
Stem Diameter
Intake
Exhaust
Stem - to - Guide
Clearance
Intake
Exhaust
Valve Lift ( @ Zero Lash)
Intake
Exhaust
DR
SPECIFICATION
45.0° - 45.5°
50.67 - 50.93 mm
(1.99 - 2.00 in.)
39.27 - 39.53 mm
(1.54 - 1.55 in.)
123.38 - 123.76 mm
(4.857 - 4.872 in.)
120.475 - 120.855 mm
(4.743 - 4.758 in.)
7.935 - 7.953 mm
(0.312 - 0.313 in.)
7.905 - 7.925 mm
(0.311 - 0.312 in.)
0.022 - 0.065 mm
(0.0008 - 0.0025 in.)
0.050 - 0.095 mm
(0.0019 - 0.0037 in.)
12.0 mm (0.472 in.)
11.70 mm (0.460 in.)