Chrysler RAM TRUCK 2500 1994 Service Manual page 738

3.9L E N G I N E S E R V I C E P R O C E D U R E S
INDEX
page
Camshaft 29
Crankshaft 34
Crankshaft Main Bearings 35
Crankshaft Rear Oil Seals 36
Cylinder Block 37
Cylinder Head Cover 20
Cylinder Heads 21
Distributor 31
Engine Assembly 19
Engine Front Mounts 17
Engine Rear Mount 18
Front Crankshaft Oil Seal Replacement 29
page
General Information 17
Hydraulic Tappets . 25
Oil Pan . 32
Oil Pump 32
Piston / Connecting Rod Assembly 33
Rocker Arms 21
Specifications—3.9L Engine 40
Timing Chain Cover . 27
Valve Stem Seal / Spring Replacement 25
Valve Timing . 26
Valves / Valve Springs . 23
Vibration Damper 26
GENERAL INFORMATION
The 3.9 Liter (238 CID) six-cylinder engine is a V-
Type, lightweight, single cam, overhead valve engine
with hydraulic roller tappets (Fig. 1).
Engine Type.... . . . . W V-6 OHV
Bora a n d Stroke.. 9 9 . 3 x 8 4 . 0 mm (3.91 x 3.31 in.)
Displacement 3.9L ( 2 3 8 c u . in.)
Compression Ratio ....9.1:1
Torque 312 N®m (230 ft. lbs.) O 3
#
200 rpm
Firing
Order
......1-6-5-4-3-2
Uibrication Pressure Feed - Full Flow Filtration
Engine O i l Capacity 3.8L (4.0 Qts) with Filter
Cooling System Liquid Cooled - Forced Circulation
Cooling
Capacity
14.3L(15.1
Qts)
Cylinder Block C a s t Iron
Crankshaft .Nodular Iron
Cylinder H e a d C a s t Iron
Combustion Chambers "Fast Bum" Design
Camshaft Nodular C a s t Iron
Pistons ....Aluminum Alloy w / S f r u t
Connecting Rods Forged Steel
J9409-9
Fig. 1 Engine Description
This engine is designed for unleaded fuel.
Engine lubrication system consists of a rotor type
oil pump and a full flow oil filter.
The cylinders are numbered from front to rear; 1,
3, 5 on the left bank and 2, 4, 6 on the right bank.
The firing order is 1-6-5-4-3-2 (Fig. 2).
The engine serial number is stamped into a ma­
chined pad located on the left, front corner of the cyl­
inder block. When component part replacement is
necessary, use the engine type and serial number for
reference (Fig. 3).
0 0 0
J9309-26
Fig. 2 Firing Order
X M 3,91 T XXXX XXXXXXXX
X = Last Digit of Model Year
M = Plant - M Mound Road
S Saltillo
T Trenton
K Toluca
3.9L = Engine Displacement
T - Usage - T Truck
XXXX • Month/Day
XXXXXXXX - Serial Code - Last 8 Digits of VIN No.
J9209-72
Fig. 3 Engine identification Number
ENGINE FRONT MOUNTS
REMOVAL
(1) Disconnect the negative cable from the battery.