Chrysler RAM TRUCK 2500 1994 Service Manual page 763

ENGINE SPECIFICATIONS (CONT.)
V a l v e S p r i n g s
Free Length (Approx.) 49.962 mm
(1.967 in)
Spring Tension @ 41.66 mm = 378 N
(Valve Closed) (@ 1.64 in = 85 lbs)
Spring Tension @ 30.89 m m * 890 N
(Valve Open) (@ 1.212 in - 200 lbs)
Number of Coils 6.8
Installed Height 41.66 m m
(Spring Seat to Retainer) (1.64 in)
Wire Diameter . 4.50 m m
(0.177 in)
Valv® Timing
Exhaust Valve
Closes (ATC) 25°
Opens (BBC) . . 56°
Duration 264°
Intake Valve
Closes (ABC) 65°
Opens (BTC) 8°
Duration 250°
Valve Overlap 31°
J9409-98
OVERSIZE AND UNDERSIZE ENGINE COMPONENT MARKINGS
C O N D I T I O N IDENTIFICATION LOCATION O F IDENTIFICATION
CRANKSHAFT JOURNALS
(UNDERSIZE)
0.0254 m m (0.001 in.)
RorM
M-2-3 etc. (indicating no. 2 and 3 main bearing
journal)
and/or
R-1-4 etc. (indicating no. 1 and 4 connecting rod
journal)
Steel stamped (near notch) on no. 6 crankshaft
counterweight.
HYDRAULIC TAPPETS
(OVERSIZE)
0.2032 m m (0.008 in.)
• Diamond-shaped stamp
Top pad - front of engine and flat ground on
outside surface of each O/S tappet bore.
VALVE STEMS (OVERSIZE)
0.127 m m (0.005 in.)
X
Milled pad adjacent to two tapped holes
(3/8 in.) on each end of cylinder head.
J 9 3 0 9 - 8 1