Oil Pressure Sensor/Switch; Fabrication Of Alignment Dowels; Position Of Dowels In Cylinder Block - Dodge 2001 Ram 1500 Owner's Manual

BR/BE
OIL PAN (Continued)
CLEANING
Clean the block and pan gasket surfaces.
Trim or remove excess sealant film in the rear
main cap oil pan gasket groove. DO NOT remove
the sealant inside the rear main cap slots.
If present, trim excess sealant from inside the
engine.
Clean oil pan in solvent and wipe dry with a clean
cloth.
Clean oil screen and pipe thoroughly in 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, if necessary.
INSTALLATION
(1) Clean the block and pan gasket surfaces.
(2) Fabricate four alignment dowels from 5/16 X 1
1/2 inch bolts. Cut the head off the bolts and cut a
slot into the top of the dowel. This will allow easier
installation and removal with a screwdriver (Fig. 55).
Fig. 55 Fabrication of Alignment Dowels
1 - 5/16" X 1½" BOLT
2 - DOWEL
3 - SLOT
(3) Install the dowels in the cylinder block (Fig. 56).
(4) Apply small amount of Mopar Silicone Rubber
Adhesive Sealant, or equivalent, in the corner of the
cap and the cylinder block.
(5) Slide the one-piece gasket over the dowels and
onto the block.
(6) Position the oil pan over the dowels and onto
the gasket.
(7) Install the oil pan bolts. Tighten the bolts to 24
N·m (215 in. lbs.) torque.
(8) Remove the dowels. Install the remaining oil pan
bolts. Tighten these bolts to 24 N·m (215 in. lbs.) torque.
(9) Lower the engine into the support cushion
brackets and tighten the through-bolt nut to the
proper torque.
Fig. 56 Position of Dowels in Cylinder Block
1 - DOWEL
2 - DOWEL
3 - DOWEL
4 - DOWEL
(10) Install the drain plug. Tighten drain plug to
34 N·m (27 ft. lbs.) torque.
(11) Install the engine to transmission strut.
(12) Install exhaust pipe.
(13) Lower vehicle.
(14) Install dipstick.
(15) Connect the negative cable to the battery.
(16) Fill crankcase with oil to proper level.
OIL PRESSURE SENSOR/
SWITCH
DESCRIPTION
The 2–wire, electrical/mechanical engine oil pres-
sure sensor (sending unit) is located in an engine oil
pressure gallery.
OPERATION
The oil pressure sensor uses two circuits. They are:
• A signal to the PCM relating to engine oil pressure
• A sensor ground through the PCM's sensor return
The oil pressure sensor returns a voltage signal
back to the PCM relating to engine oil pressure. This
signal is then transferred (bussed) to the instrument
panel on a CCD bus circuit to operate the oil pres-
sure gauge and the check gauges lamp. Ground for
the sensor is provided by the PCM through a low-
noise sensor return.
ENGINE 3.9L 9 - 49