Dodge D150 1990 Service Manual page 624

3.9L ENGINE 9 - 37
OIL PUMP INSPECTION LIMITS FOR REPLACEMENT—3.9L
Oil Pump Cover Out Of Flat -0015 inch or more
Outer Rotor Thickness .825 inch or less
Outer Rotor Diameter 2.469 inch or less
Inner Rotor Thickness .825 inch or less
Clearance Over Rotors—Outer .004 inch or more
Inner .004 inch or more
Outer Rotor Clearance -014 inch or more
Tip Clearance Between Rotors -008 inch or more
J9009-106
OVERSIZE AND UNDERSIZE ENGINE COMPONENT MARKINGS—3.9L
Condition Identification
Location of Identification
. 0 0 1 " U/S Crankshaft
R or M
M-2-3 etc. (Indicating
No. 2 & 3 main bearing
journal)
and/or
R-l-4 etc. (Indicating
No. 1 & 4 connecting rod
journal)
Steel stamped (near notch)
on number six
crankshaft counterweight
. 0 1 0 " U/S Crankshaft
RX or MX
MX (Indicates .010" U/S
all main journals)
and/or
RX (Indicating .010" U/S
all rod journals)
Steel stamped (near notch)
on number six
crankshaft counterweight
. 0 2 0 " O/S Cylinder
Bores
A Following engine serial number
. 0 0 8 " O/S Tappets
•
3/8" diamond shaped stamp
Top pad—Front of engine and
flat ground on outside surface
of each O/S tappet bore.
. 0 0 5 " O/S Valve Stems
X Milled pad adjacent to two
3/8" tapped holes on each end
of cylinder head.
J9009-107