1999 DODGE RAM engine oil
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Normal Service .......................... 6 ............... 7500
Severe Service ......................... (3) .............. 3000
Engine Oil Filter
Normal Service .......................... 12 ............ 15,000
Severe Service ......................... ( 3) .............. 6000
PCV Valve ( 6)
Normal Service .......................... 48 ............ 60,000
Severe Service ......................... ( 3) ............ 30,000
Spark Plugs
Normal Service .......................... 24 ............ 30,000
Severe Service ......................... ( 3) ............ 30,000
Spark Plug Wires
Normal Service .......................... 48 ............ 60,000
Severe Service ......................... ( 3) ............ 60,000
Automatic Transmission Fluid,
Filter & Band Adjustment
Normal Service .......................... 30 ............ 37,500
Severe Service ......................... ( 3) ............ 12,000
Manual Transmission Fluid ................ ( 7) ............... ( 7)
Transfer Case Fluid (4WD)
Normal Service .......................... 30 ............ 37,500
Severe Service ......................... ( 3) ............ 36,000
Front Differential Fluid (4WD) ( 8)
Severe Service ......................... ( 3) ............ 12,000
Rear Differential Fluid ( 8)
Severe Service ......................... ( 3) ............ 12,000
Repack Front Wheel Bearings (2WD)
Normal Service .......................... 18 ............ 22,500
Severe Service ......................... ( 3) ............ 21,000
( 1) - Light-duty vehicles apply to all 1500 models and 2500 except
5.9L diesel or 8.0L engines.
( 2) - Different interval may be required for normal and severe
service. Severe service is described as long periods of engine
idling, frequent short trip operation of less than 5 miles,
trailer towing, off-highway operation, snow removal operation,
or operating in dusty or excessively hot conditions.
( 3) - Monthly interval is not available from manufacturer.
( 4) - Inspect air filter every 15,000 miles and replace as necessary.
Replace at 30,000 miles unless previously replaced during
inspection.
( 5) - Replace coolant at 45,000 miles or 36 months whichever occurs
first. Replace coolant at 36 months regardless of mileage. After
first coolant change, replace coolant every 24 months or 30,000
miles thereafter.
( 6) - Inspect at scheduled interval and replace as necessary.
( 7) - Service interval is not available from manufacturer.
( 8) - Normal service interval is not available from manufacturer.
Manufacturer lists service schedule only under severe service
conditions.
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REPLACEMENT INTERVALS (RAM PICKUP - MEDIUM-DUTY - GASOLINE) ( 1)( 2) \
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Component Months Miles
Air Filter
Normal Service ...................... 30 ................ 30,000
Severe Service ...................... ( 3) ........... ( 4) 15,000
Coolant ............................... ( 5) .................. ( 5)
Engine Oil & Filter
Normal Service ....................... 6 .................. 6000
Severe Service ...................... ( 3) ................. 3000
Page 1185 of 1691
Spark Plugs
Normal Service ...................... 30 ................ 30,000
Severe Service ...................... (3) ............... 30,000
Spark Plug Wires
Normal Service ...................... 60 ................ 60,000
Severe Service ...................... ( 3) ............... 60,000
Automatic Transmission Fluid,
Filter & Band Adjustment
Normal Service ...................... 24 ................ 24,000
Severe Service ...................... ( 3) ............... 12,000
Manual Transmission Fluid ............. ( 6) .................. ( 6)
Transfer Case Fluid (4WD)
Normal Service ...................... 36 ................ 36,000
Severe Service ...................... ( 3) ............... 36,000
Front Differential Fluid (4WD) ( 7)
Severe Service ...................... ( 3) ............... 12,000
Rear Differential Fluid ( 7)
Severe Service ...................... ( 3) ............... 12,000
Repack Front Wheel Bearings (2WD)
Normal Service ....................... 18 ............... 18,000
Severe Service ...................... ( 3) ............... 24,000
( 1) - Medium-duty vehicles apply to 2500 and 3500 Calif. models with
8.0L engine.
( 2) - Different interval may be required for normal and severe
service. Severe service is described as long periods of engine
idling, frequent short trip operation of less than 5 miles,
trailer towing, off-highway operation, snow removal operation,
or operating in dusty or excessively hot conditions.
( 3) - Monthly interval is not available from manufacturer.
( 4) - Inspect air filter every 15,000 miles and replace as necessary.
Replace at 30,000 miles unless previously replaced during
inspection.
( 5) - Replace coolant at 36,000 miles or 36 months whichever occurs
first. Replace coolant at 36 months regardless of mileage. After
first coolant change, replace coolant every 24 months or 30,000
miles thereafter.
( 6) - Service interval is not available from manufacturer.
( 7) - Normal service interval is not available from manufacturer.
Manufacturer lists service schedule only under severe service
conditions.
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REPLACEMENT INTERVALS (RAM PICKUP - HEAVY-DUTY - GASOLINE) ( 1)( 2) \
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Component Months Miles
Air Filter
5.9L
Normal Service .................... 24 ................. 24,000
Severe Service ................... ( 3) ............. ( 4) 12,000
8.0L ............................... 12 ................. 12,000
Air Injection Pump Filter
Normal Service ..................... 24 ................. 24,000
Severe Service .................... ( 3) ............. ( 4) 12,000
Coolant ............................. ( 5) .................... ( 5)
EGR Valve (5.9L Only) ( 6)
Normal Service ..................... 60 ................. 60,000
Severe Service .................... ( 3) ................. 60,000
Engine Oil
Normal Service ..................... 6 .................... 6000
Severe Service .................... ( 3) ................... 3000
Engine Oil Filter
Page 1187 of 1691
![DODGE RAM 1999 Service Repair Manual \
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REPLACEMENT INTERVALS (RAM PICKUP - MEDIUM & H](/manual-img/12/56915/w960_56915-1186.png "DODGE RAM 1999 Service Repair Manual \
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REPLACEMENT INTERVALS (RAM PICKUP - MEDIUM & H")
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REPLACEMENT INTERVALS (RAM PICKUP - MEDIUM & HEAVY DUTY - 5.9L
DIESEL) (1)
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Component Months Miles
Air Filter ............................... ( 2) ............... ( 2)
Coolant .................................. ( 3) ............... ( 3)
Engine Oil & Filter
Normal Service .......................... 6 ............... 7500
Severe Service ......................... ( 4) .............. 3750
Fuel Filter
Normal Service .......................... 12 ............ 15,000
Severe Service ......................... ( 4) .............. 7500
Valve Clearance Adjustment ............... ( 5) ............... ( 5)
Automatic Transmission Fluid,
Filter & Band Adjustment
Normal Service .......................... 24 ............ 30,000
Severe Service ......................... ( 4) ............ 15,000
Manual Transmission Fluid ................ ( 6) ............... ( 6)
Transfer Case Fluid (4WD)
Normal Service .......................... 36 ............ 45,000
Severe Service ......................... ( 4) ............ 36,000
Front Differential Fluid (4WD) ( 7)
Severe Service ......................... ( 4) ............ 15,000
Rear Differential Fluid ( 7)
Severe Service ......................... ( 4) ............ 15,000
Repack Front Wheel Bearings (2WD)
Normal Service .......................... 24 ............ 30,000
Severe Service ......................... ( 4) ............ 30,000
Normal Service .......................... 48 ............ 48,000
Severe Service ......................... ( 4) ............ 48,000
( 1) - Different interval may be required for normal and severe
service. Severe service is described as long periods of engine
idling, frequent short trip operation of less than 5 miles,
trailer towing, off-highway operation, snow removal operation,
or operating in dusty or excessively hot conditions.
( 2) - Service interval is not available from manufacturer. Use filter-
minder on top of air cleaner housing to determine condition of
air filter. If filter-minder is in the Red zone, replace air
filter. Reset filter-minder by depressing button on top of
filter-minder.
( 3) - Replace coolant at 30,000 miles or 24 months whichever occurs
first. Replace coolant at 24 months regardless of mileage. After
first coolant change, replace coolant every 24 months or 30,000
miles thereafter.
( 4) - Monthly interval is not available from manufacturer.
( 5) - Does not require routine adjustments.
( 6) - Service interval is not available from manufacturer.
( 7) - Normal service interval is not available from manufacturer.
Manufacturer lists service schedule only under severe service
conditions.
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REPLACEMENT INTERVALS (RAM VAN & RAM WAGON) ( 1) \
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Component Months Miles
Air Filter
Normal Service ................... 24 ................... 30,000
Severe Service ................... ( 2) .............. ( 3) 15,000
Page 1188 of 1691
Coolant ............................ (4) ..................... ( 4)
Engine Oil
Normal Service .................... 6 ..................... 7500
Severe Service ................... ( 2) .................... 3000
Engine Oil Filter
Normal Service ................... 12 ................... 15,000
Severe Service ................... ( 2) .................... 6000
PCV Valve ( 5)
Normal Service ................... 48 ................... 60,000
Severe Service ................... ( 2) .................. 30,000
Spark Plugs
Normal Service ................... 24 ................... 30,000
Severe Service ................... ( 2) .................. 30,000
Spark Plug Wires
Normal Service ................... 48 ................... 60,000
Severe Service ................... ( 2) .................. 60,000
Automatic Transaxle Fluid,
Filter & Band Adjustment .......... ( 6) ..................... ( 6)
Rear Differential Fluid ( 7)
Severe Service ................... ( 2) .................. 12,000
Repack Front Wheel Bearings
Normal Service ................... 18 ................... 22,500
Severe Service ................... ( 2) .................. 21,000
( 1) - Different interval may be required for normal and severe
service. Severe service is described as long periods of engine
idling, frequent short trip operation of less than 5 miles,
trailer towing, or operating in dusty or excessively hot
conditions.
( 2) - Monthly interval is not available from manufacturer.
( 3) - Inspect air filter every 15,000 miles and replace as necessary.
Replace at 30,000 miles unless previously replaced during
inspection.
( 4) - Replace coolant at 45,000 miles or 36 months whichever occurs
first. Replace coolant at 36 months regardless of mileage. After
first coolant change, replace coolant every 24 months or 30,000
miles thereafter.
( 5) - Inspect at scheduled interval and replace as necessary.
( 6) - Normal service interval is not available from manufacturer.
Under severe service, change fluid, filter and adjust bands
every 12,000 miles.
( 7) - Normal service interval is not available from manufacturer.
Manufacturer lists service schedule only under severe service
conditions.
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BELT ADJUSTMENT (Tension In Lbs. (kg) Using Belt Tension Gauge) \
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Application New Belt (1) Used Belt
Caravan
2.4L
A/C & Generator ...................... 190 (86) ...... 115 (52\
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Power Steering ....................... 140 (64) ....... 90 (41\
)
3.0L
A/C .................................. 150 (68) ....... 80 (36\
)
Generator & Power Steering ............. ( 2) .............. ( 2)
3.3L & 3.8L ............................. ( 2) .............. ( 2)
Dakota
2.5L .................................. 200 (91) ...... 160 (73\
)
3.9L, 5.2L & 5.9L ....................... ( 2) .............. ( 2)
Durango
3.9L, 5.2L & 5.9L ....................... ( 2) .............. ( 2)
Page 1189 of 1691
Ram Pickup, Ram Van & Ram Wagon ........... (2) .............. ( 2)
Town & Country
3.3L & 3.8L ............................. ( 2) .............. ( 2)
Voyager
2.4L
A/C & Generator ...................... 190 (86) ...... 115 (52\
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Power Steering ....................... 140 (64) ....... 90 (41\
)
3.0L
A/C .................................. 150 (68) ....... 80 (36\
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Generator & Power Steering ............. ( 2) .............. ( 2)
3.3L .................................... ( 2) .............. ( 2)
( 1) - Used belt is a belt that has been in service for more than 15
minutes.
( 2) - Automatic belt tensioner is used. Belt tension adjustment is not
required.
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MECHANICAL CHECKS
ENGINE COMPRESSION
Ensure battery is fully charged. Warm engine to normal
operating temperature. Disconnect wire at ignition coil to prevent
engine from starting. Check engine compression with all spark plugs
removed and throttle wide open.
COMPRESSION SPECIFICATIONS
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Application Specification
Compression Ratio
Caravan
2.4L ...................................................... 9.4:1
3.0L ...................................................... 8.9:1
3.3L ...................................................... 8.9:1
3.8L ...................................................... 9.6:1
Dakota & Durango ........................................... 9.1:1
Ram Pickup
3.9L, 5.2L & 5.9L (Gasoline) .............................. 9.1:1\
5.9L (Diesel) ............................................ 17.5:1\
8.0L ...................................................... 8.4:1
Ram Van & Ram Wagon ........................................ 9.1:1
Town & Country
3.3L ...................................................... 8.9:1
3.8L ...................................................... 9.6:1
Voyager
2.4L ...................................................... 9.4:1
3.0L ...................................................... 8.9:1
3.3L ...................................................... 8.9:1
Normal Compression Pressure
Caravan
2.4L ............................. 170-225 psi (11.9-15.7 kg/cm
)
3.0L ...................................... 178 psi (12.5 kg/cm)
3.3L & 3.8L ................................................. ( 1)
Dakota
2.5L .............................. 120-150 psi (8.4-10.5 kg/cm
)
3.9L, 5.2L & 5.9L ........................................... ( 1)
Durango ...................................................... ( 1)
Ram Pickup, Ram Van & Ram Wagon .............................. ( 1)
Town & Country ............................................... ( 1)
Voyager
Page 1190 of 1691
2.4L ............................. 170-225 psi (11.9-15.7 kg/cm)
3.0L ...................................... 178 psi (12.5 kg/cm)
3.3L ........................................................ ( 1)
Minimum Compression Pressure
Caravan, Town & Country, & Voyager .......... 100 psi (7.0 kg/cm
)
Dakota
2.5L ........................................................ ( 1)
3.9L, 5.2L & 5.9L .......................... 100 psi (7.0 kg/cm
)
Durango ..................................... 100 psi (7.0 kg/cm)
Ram Pickup
3.9L, 5.2L & 5.9L (Gasoline) & 8.0L ........ 100 psi (7.0 kg/cm
)
5.9L (Diesel) ............................................... ( 1)
Ram Van & Ram Wagon ......................... 100 psi (7.0 kg/cm
)
Maximum Variation Between Cylinders
Caravan, Town & Country & Voyager ..................... 25 Percent
Dakota
2.5L ........................................ 30 psi (2.1 kg/cm
)
3.9L, 5.2L & 5.9L ........................................... ( 1)
Durango ...................................................... ( 1)
Ram Pickup, Ram Van & Ram Wagon .............................. ( 1)
( 1) - Information is not available from manufacturer.
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VALVE CLEARANCE
Gasoline Models
All engines are equipped with hydraulic lifters. No
adjustments are required.
5.9L Diesel (Ram Pickup)
Valve adjustment is recommended every 150 months or 150,000
miles during normal service, every 135,000 miles during severe
service. Severe service is described as frequent short trip operation
of less than 5 miles, long periods of engine idling, trailer towing,
police, taxi, local delivery service, or operating in dusty or
excessively hot conditions. See VALVE CLEARANCE SPECIFICATIONS
(DIESEL) table.
VALVE CLEARANCE SPECIFICATIONS (DIESEL) ( 1)
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Application In. (mm)\
Intake Valve ............................................ .010 (.25)\
Exhaust Valve ........................................... .020 (.51)\
(1) - Adjust valves with engine temperature less than 140
F (60C). \
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IGNITION SYSTEM
IGNITION COIL
IGNITION COIL RESISTANCE - Ohms @ 70-80F (21-27C) \
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Application Primary Secondary
Caravan
2.4L
Diamond ( 1)( 2) ............... .53-.65 .......... 11,500-13,500
Weastec ( 1) .................. .45-.65 .......... 10,900-14,700
3.0L ............................. ( 3) ..................... ( 3)
Page 1210 of 1691
ON-VEHICLE TESTING
CAUTION: When battery is disconnected, vehicle computer and memory
systems may lose memory data. Driveability problems may exist
until computer systems have completed a relearn cycle. See
COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION
before disconnecting battery.
DISABLING/ENABLING IGNITION & FUEL SYSTEMS
WARNING: To prevent engine from starting while performing tests,
always disable ignition and fuel systems.
Disabling Ignition & Fuel Systems
Remove Automatic Shutdown Relay (ASD) located in Power
Distribution Center (PDC). Refer to PDC cover for proper relay
location. PDC is located in engine compartment. On 5.9L diesel
engines, also disconnect fuel shutdown solenoid connector. Solenoid is
located behind upper intake manifold. See appropriate SYSTEM &
COMPONENT TESTING article in ENGINE PERFORMANCE section.
Enabling Ignition & Fuel Systems
When testing and/or repairs have been completed, verify
battery condition. Recharge battery as necessary, after starter tests
have been completed. Disconnect all test equipment. Install ASD relay.
On 5.9L diesel engines, reconnect fuel shutdown relay connector. On
all models, start engine several times to verify malfunction has been
corrected.
CRANKING TEST
NOTE: Ensure engine is at normal operating temperature. High
viscosity oil, extreme cold temperatures, or tight engine
will increase amperage draw.
1) Using a battery load tester, connect positive and negative
leads to battery. Connect inductive ammeter pick-up to positive
battery cable. Disable ignition and fuel systems. See
DISABLING/ENABLING IGNITION & FUEL SYSTEMS.
2) Ensure all lights and accessories are off. Place A/T in
Park position or M/T in Neutral position. Apply parking brake. Crank
engine and observe voltmeter reading. If voltage is more than 9.6
volts and cranking amperage draw is more than specified amps, proceed
to CIRCUIT RESISTANCE TESTS. See STARTER SPECIFICATIONS - CARS or
STARTER SPECIFICATIONS - TRUCKS.
3) If voltage is 12.5 volts or more and cranking amperage
draw is less than specified, check starter circuit components in the
following order:
starter solenoid, starter relay, starter relay circuit, park/neutral
position switch or transmission range sensor (A/T), clutch pedal
position switch (M/T), ignition switch, wiring harness and
connections.
CIRCUIT RESISTANCE TESTS
NOTE: If excessive resistance is not found in circuits being
tested, remove starter and proceed to BENCH TESTING.
Battery Connection Resistance Test
1) Disable vehicle ignition and fuel systems. See
DISABLING/ENABLING IGNITION & FUEL SYSTEMS. A voltmeter accurate to
one tenth of a volt will be needed for the following tests.
Page 1216 of 1691
Bosch 2.0L .................................................. (2)
Melco 2.5L & 2.7L ........................................... ( 2)
Nippondenso 2.4L, 2.7L & 3.5L ............................... ( 2)
Power Rating
Bosch 2.0L ............................................... 0.95 Kw
Melco 2.5L & 2.7L ......................................... 1.2 Kw
Nippondenso 2.4L, 2.7L & 3.5L ............................... 1.4 Kw
( 1) - With engine at normal operating temperature. High viscosity oil,
extreme cold temperatures, or tight engine will increase
amperage draw.
( 2) - Information is not available from manufacturer.
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STARTER SPECIFICATIONS - TRUCKS \
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Application Specification
Cranking Amperage Draw ( 1)
Caravan, Town & Country & Voyager ................... 150-200 Amps
Dakota & Durango
2.5L ................................................... 130 Amps
3.9L, 5.2L & 5.9L .................................. 125-250 Amps
Ram Pickup
Diesel Engines ..................................... 450-700 Amps
Gasoline Engines ................................... 125-250 Amps
Ram Van & Ram Wagon ................................. 125-250 Amps
No-Load Test At 11 Volts
Maximum Amps
Caravan, Town & Country & Voyager ....................... 73 Amps
Dakota & Durango
2.5L .................................................. 90 Amps
3.9L, 5.2L & 5.9L ..................................... 73 Amps
Ram Pickup
Gasoline .............................................. 73 Amps
Diesel ............................................... 200 Amps
Ram Van & Ram Wagon ..................................... 73 Amps
Minimum RPM
Caravan, Town & Country & Voyager ...................... 3401 RPM
Dakota & Durango
2.5L ................................................. 2600 RPM
3.9L, 5.2L & 5.9L .................................... 3601 RPM
Ram Pickup
Gasoline ............................................. 3601 RPM
Diesel ............................................... 3000 RPM
Ram Van & Ram Wagon .................................... 3601 RPM
Power Rating
Caravan, Town & Country & Voyager ......................... 1.2 Kw
Dakota & Durango
2.5L ..................................................... 1.2 Kw
3.9L, 5.2L & 5.9L ........................................ 1.4 Kw
Ram Pickup
Gasoline ................................................. 1.4 Kw
Diesel ................................................... 2.7 Kw
Ram Van & Ram Wagon ....................................... 1.4 Kw
( 1) - With engine at normal operating temperature. High viscosity oil,
extreme cold temperatures, or tight engine will increase
amperage draw.
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TORQUE SPECIFICATIONS