Chrysler RAM TRUCK 2500 1994 Service Manual page 753

OIL PAN
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Remove engine oil dipstick.
(3) Raise vehicle.
(4) Drain engine oil.
(5) Remove exhaust pipe.
(6) Remove left engine to transmission strut.
(7) Loosen the right side engine support bracket
cushion thru-bolt nut and raise the engine slightly.
Remove oil pan by sliding backward and out.
(8) Remove the one-piece gasket.
CLEANING
Clean the block and pan gasket surfaces.
Trim or remove excess sealant film i n the rear
main cap oil pan gasket groove. DO NOT remove
the sealant inside the rear main cap slots.
I f present, trim excess sealant from inside the en­
gine.
Clean oil pan i n solvent and wipe dry with a clean
cloth.
Clean oil screen and pipe thoroughly i n clean sol­
vent. Inspect condition of screen.
INSPECTION
Inspect oil drain plug and plug hole for stripped or
damaged threads. Repair as necessary.
Inspect oil pan mounting flange for bends or distor­
tion. Straighten flange, i f necessary.
INSTALLATION
(1) Fabricate 4 alignment dowels from 1 1/2 x 5/16
inch bolts. Cut the head off the bolts and cut a slot
into the top of the dowel. This will allow easier in­
stallation and removal with a screwdriver (Fig. 1).
17
2
" x 5 / 1 6 " BOLT
DOWEL
DOWEL
A
J
^ DOWEL
DOWEL J9309-78
SLOT
J 9 2 0 9 - 1 0 6
Fig. 2 Position of Dowels in Cylinder Block
(6) Install the oil pan bolts. Tighten the bolts to 24
N-m (215 in. lbs.) torque.
(7) Remove the dowels. Install the remaining oil
pan bolts. Tighten these bolts to 24 N-m (215 in. lbs.)
torque.
(8) Lower the engine into the support cushion
brackets and tighten the thru-bolt nut to the proper
torque.
(9) Install the drain plug. Tighten drain plug to 34
N-m (27 ft. lbs.) torque.
(10) Install the engine to transmission strut.
(11) Install exhaust pipe.
(12) Lower vehicle.
(13) Install dipstick.
(14) Connect the negative cable to the battery.
(15) Fill crankcase with oil to proper level.
OIL PUMP
OIL PUMP PRESSURE
The M I N I M U M oil pump pressure is 41.4 kPa (6
psi) at curb idle. The MAXIMUM oil pump pressure
is 207-552 kPa (30-80 psi) at 3,000 RPM or more.
CAUTION: If oil pressure is Z E R O at curb idle, DO
NOT run engine at 3,000 RPM.
Fig. 1 Fabrication of Alignment Dowels
(2) Install the dowels i n the cylinder block (Fig. 2).
(3) Apply small amount of Mopar Silicone Rubber
Adhesive Sealant, or equivalent i n the corner of the
cap and the cylinder block.
(4) Slide the one-piece gasket over the dowels and
onto the block.
(5) Position the oil pan over the dowels and onto
the gasket.
REMOVAL
(1) Remove the oil pan.
(2) Remove the oil pump from rear main bearing
cap.
INSTALLATION
(1) Install oil pump. During installation slowly ro­
tate pump body to ensure driveshaft-to-pump rotor
shaft engagement.