Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP1999WRANGLER L4-2.5L VIN PREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINESYSTEM SPECIFICATIONSGENERAL SPECIFICATIONS
1999 Jeep Wrangler L4-2.5L VIN P
General Specifications
1999 Jeep Wrangler L4-2.5L VIN PSECTION General Specifications
General Engine Specifications
| Engine Type | In-Line 4-Cylinder, OHV |
| Bore | 98.4 mm (3.88 in.) |
| Stroke | 81.0 mm (3.19 in.) |
| Displacement | 2.5L (150 cu. in.) |
| Compression Ratio | 9.1 : 1 |
| Cylinder Compression Pressure | 827-1034 kPa (120-150 psi) |
| Max. Pressure Variation | 206 kPa (30 psi) |
| Torque | 190 Nm (140 ft. lbs.) @ 3500 rpm |
| Firing Order | 1-3-4-2 |
| Lubrication | Pressure Feed-Full Flow Filtration |
| Engine Oil Capacity | 3.8L (4.0 qts) |
| Cooling System | Liquid Cooled-Forced Circulation |
| Cooling System Capacity | 8.5L (9 qts) |
| Cylinder Block | Cast Iron |
| Crankshaft | Cast Nodular Iron |
| Cylinder Head | Cast Nodular Iron |
| Camshaft | Cast Nodular Iron |
| Pistons | Aluminum Alloy (with struts) |
| Piston Combustion Cavity | Double Quench |
| Connecting Rods | Cast Nodular Iron |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.