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 SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYSYSTEM SPECIFICATIONSPISTON, ENGINE
1999 Jeep Wrangler L4-2.5L VIN P
Piston, Engine
1999 Jeep Wrangler L4-2.5L VIN PSECTION Piston, Engine
| Weight (Less Pin) | 14.7 to 15.1 oz |
| Piston Pin Bore (Centerline to Piston Top) | 1.599 to 1.603 Inch (in) |
| Piston-To-Bore Clearance | 0.0008 to 0.0015 Inch (in) |
| Ring Gap Clearance - Top Compression Ring | 0.0090 to 0.0240 Inch (in) |
| Ring Gap Clearance - 2nd Compression Ring | 0.0190 to 0.0380 Inch (in) |
| Ring Gap Clearance - Oil Control Steel Rails | 0.010 to 0.060 Inch (in) |
| Ring Side Clearance - Compression Rings | 0.0017 to 0.0033 Inch (in) |
| Ring Side Clearance - Oil Control Ring | 0.0024 to 0.0083 Inch (in) |
| Piston Ring Groove Height - Compression Rings | 0.0602 to 0.0612 Inch (in) |
| Piston Ring Groove Height - Oil Control Ring | 0.1589 to 0.1598 Inch (in) |
| Piston Ring Groove Diameter - No.1 Compression Ring | 3.48 to 3.49 Inch (in) |
| Piston Ring Groove Diameter - No. 2 Compression Ring | 3.45 to 3.46 Inch (in) |
| Piston Ring Groove Diameter - Oil Control Ring | 3.53 to 3.54 Inch (in) |
| Piston Pin Bore Diameter | 0.9312 to 0.9315 Inch (in) |
| Piston Pin Diameter | 0.9306 to 0.9307 Inch (in) |
| Piston-To-Pin Clearance | 0.0005 to 0.0009 Inch (in) |
| Piston-To-Pin Connecting Rod (Press Fit) | 2000 lbf |
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.