Chrysler RAM TRUCK 2500 1994 Service Manual page 885

9 - 164 5.9L (DIESEL) ENGINE
•
OIL PRESSURE REGULATOR VALVE / SPRING
When oil pressure from the oil pump exceeds 448
kPa (65 psi), the regulator valve opens to allow oil to
drain back into the pan.
REMOVAL
(1) Remove the threaded plug, gasket, spring and
valve (Fig. 11).
OIL
FILTER
PLUG GASKET
SPRING
9
J9109-14
Fig. 11 Oil Pressure Regulator
(2) Check the spring for height and load limita­
tions (Fig. 12). Replace the spring i f out of limits.
VALVE OPEH
• HEIGHT: 3 9 . 9 8 m m (1.574 inch)
• L O A D : 91 N (20.5 lb)
M S E M I L E P
• HEIGHT: 4 4 . 9 8 m m (1.77 inch)
• L O A D : 60 N (13.5 lb)
J9109-13
Fig. 12 Oil Pressure Regulator Spring Check
INSTALLATION
(1) Clean and inspect the plunger, bore and seat
before assembly. The plunger must move freely i n the
valve bore.
(2) Install the valve, spring, gasket and plug.
Tighten the plug to 80 N-m (60 ft. lbs.) torque.
OIL COOLER ELEMENT / GASKET
The non-intercooled turbocharged engine filter
head/coolers can not be used on intercooled engines.
REMOVAL
(1) Drain the cooling system (refer to Group 7,
Cooling System for the proper procedures).
(2) Remove the oil filter.
(3) Clean around the oil cooler cover.
(4) Disconnect the turbocharger supply line (Fig.
13).
(5) Remove the oil cooler cover, gaskets and cooler
element.
J9109-17
Fig. 13 Turbocharger Supply Line
CLEANING AND INSPECTION
Clean the sealing surfaces.
Apply 483 kPa (70 psi) air pressure to the element
to check for leaks. I f the element leaks, replace the
element.
INSTALLATION
(1) I f a new oil cooler is being installed, remove the
shipping plugs (Fig. 14).
(2) Assemble the oil cooler, gaskets and the cover
(Fig. 14). Tighten the bolts to 24 N-m (18 ft. lbs.)
torque.
COVER
GASKETS
SHIPPING
PLUG
J9109-18
Fig. 14 Oil Cooler
the turbocharger oil (3) Connect the turbocharger oil supply line.
Tighten the nut to 15 N-m (11 ft. lbs.) torque.
(4) Fill the filter with clean lubricating oil and ap­
ply a light coat of oil to the sealing gasket. Install
the oil filter.
(5) Fill the coolant system and operate the engine
to check for leaks. Stop the engine and check the
coolant and oil level.