1993 Jeep Cherokee
1993 ENGINE PERFORMANCE
Chrysler Corp. - Service & Adjustment Specifications
Jeep; Cherokee, Grand Cherokee, Grand Wagoneer, Wrangler
INTRODUCTION
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article for when you are familiar with an adjustment procedure and only need a specification.
CAPACITIES
BATTERY SPECIFICATIONS
Application Group Cold Crank Amps @ 0F (-18C)
2.5L 58 390
4.0L
Cherokee 58 475
Grand Cherokee .... 34 600
5.2L 34 600
FLUID CAPACITIES
Application (1) Quantity
Crankcase (2)
2.5L 5.0 Qts. (4.7L)
4.0L 6.0 Qts. (5.7L)
5.2L 5.0 Qts. (4.7L)
Cooling System (Includes Heater) 2.5L
Cherokee 10.0 Qts. (9.5L)
Wrangler 9.0 Qts. (8.5L)
4.0L
Cherokee 12.0 Qts. (11.4L)
Grand Cherokee 9.3 Qts. (8.8L)
Wrangler 10.5 Qts. (9.9L)
5.2L
Grand Cherokee 14.9 Qts. (14.1L)
Automatic Transmission (3)
AW-4 (4) 8.5 Qts. (8.0L)
32RH (4) 8 Qts. (7.6L)
42RE (5) 10.2 Qts. (9.6L)
Manual Transmission (API GL-5 75W-90)
AX-5 (2WD 5-Speed) 7.4 Pts. (3.5L)
AX-5 (4WD 5-Speed) 7.0 Pts. (3.3L)
AX-15 (5-Speed) 6.7 Pts. (3.2L)
Front/Rear Axles (API GL-5 75W-90)
Cherokee (6) 2.5 Pts. (1.2L)
Grand Cherokee (7) (8) 3.0 Pts. (1.4L)
Wrangler (7) (8) 2.5 Pts. (1.2L)
Wrangler (H/D Axle) (5) (6) 3.0 Pts. (1.4L)
Transfer Case (Mercon or Dexron-II) Command-Trac 231
Except Wrangler 2.2 Pts. (1.0L)
Wrangler 3.3 Pts. (1.5L)
Model 249 3.0 Pts. (1.4L)
Selec-Trac 242 3.0 Pts. (1.4L)
- Fluid capacities listed are approximate. Always fill to FULL
mark.
- Includes oil filter.
- Drain and refill capacity only. Does not include torque
converter.
- Mercon or Dexron-II fluid.
- Mopar ATF Plus fluid only.
(6) - With trailer towing package (5000 lbs.), use 75W-140 synthetic
gear oil.
(7) - With trailer towing package use API GL-5 80W-140.
(8) - With modifier.
limited slip differential, add 2 ounces of friction
QUICK-SERVICE
SERVICE INTERVALS & SPECIFICATIONS
REPLACEMENT INTERVALS Component
Miles
Oil & Filter 7,500
Air Filter 30,000
Coolant 45,000
Fuel Filter 30,000
Oxygen Sensor 75,000
Spark Plugs 30,000
BELT ADJUSTMENT (Tension In Lbs. (kg) Using Belt Tension Gauge)
Application
Tension
Serpentine Belt (1)
New Belts 180-200 (81.72-90.8)
Used Belts 140-160 (63.56-72.64)
V-Belt
New Belts 120-160 (54.48-72.64)
Used Belts 90-115 (40.86-52.21)
(1) - Grand Cherokee is equipped with automatic belt adjustment.
MECHANICAL CHECKS
ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature, all spark plugs removed and throttle wide open.
NOTE: Compression pressure and cylinder pressure variation for
2.5L and 4.0L engines are not available from manufacturer at time of publication.
COMPRESSION SPECIFICATIONS
Application Specification
2.5L
Cherokee 9.2:1
Wrangler 9.1:1
4.0L 8.8:1
5.2L 9.1:1
Normal Compression Pressure ... 120-150 psi (827-1034 kPa)
Minimum Compression Pressure 100 psi (689 kPa)
Maximum Variation Between Cylinders 5 psi (172 kPa)
VALVE CLEARANCE
NOTE: Vehicles are equipped with hydraulic lifters. No adjustments
are required.
IGNITION SYSTEM
IGNITION COIL
IGNITION COIL RESISTANCE - Ohms @ 68F (20C)
Application Primary Secondary
Diamond Coil 97-1.18 11,300-15,300
Toyodenso Coil 95-1.20 11,300-13,300
HIGH TENSION WIRE RESISTANCE
HIGH TENSION WIRE RESISTANCE
Application Ohms
All Wires 250-1000 per inch
SPARK PLUGS
SPARK PLUG TYPE
Application Specification
2 . 5L & 4 . 0L Champion RC-12 LYC
5. 2L Champion RC-12YC
SPARK PLUG SPECIFICATIONS
Application Gap: In. (mm) Torque: Ft. Lbs. (N.m)
2.5L, 4.0L & 5.2L .. .035 (.89) 27 (37)
FIRING ORDER & TIMING MARKS
FRONT OF VEHICLE
9087
Fig. 1: Firing Order & Timing Marks (2.5L)
Firing Order 1-5-3-6-2-4
Fig. 2: Firing Order & Timing Marks (4.0L)
95E35778
Fig. 3: Firing Order & Distributor Rotation (5.2L) Courtesy of Chrysler Corp.
IGNITION TIMING
Vehicles are equipped with Powertrain Control Module (PCM) computerized ignition. PCM controls ignition timing. No adjustment is possible.
DISTRIBUTOR SPECIFICATIONS
Vehicles are equipped with Powertrain Control Module
computerized ignition. Distributor’s only function is to distribute high voltage to appropriate spark plug. No adjustments are required.
FUEL SYSTEM
FUEL PUMP
NOTE: Fuel pump performance refers to fuel pressure and volume availability, not regulated fuel pressure.
FUEL PUMP PERFORMANCE
Application
2.5L, 4.0L & 5.2L
psi (kg/cm) . 39 (2.70)
Minimum Volume In 30 sec.
1 Pt. (.47L)
REGULATED FUEL PRESSURE
Application
With Vacuum Without Vacuum
psi (kg/cm) At Idle
31 (2.18) 39 (2.70)
INJECTOR RESISTANCE
INJECTOR RESISTANCE - Ohms @ 68F (20C)
Application Specification
2.5L, 4.0L & 5.2L 12.8-15.2
IDLE SPEED& MIXTURE
NOTE: Idle mixture is controlled by the Powertrain Control Module (PCM). Adjustment is not required or possible.
THROTTLE POSITION SENSOR (TPS)
2.5L, 4.0L & 5.2L
Output voltage (center terminal of TPS) should be .20 volts at closed throttle and less than 4.8 volts at WOT. TPS is not adjustable.
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