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.
2000 Jeep TJ (CANADA) L6-4.0LFACTORY OEM SERVICE PROCEDURE
Piston Ring Specifications
| Ring Gap Clearance | Top Compression Ring | 0.0090 to 0.0240 |
| 2nd Compression Ring | 0.0190 to 0.0380 | |
| Oil Control Steel Rails | 0.010 to 0.060 | |
| Ring Side Clearance | Compression Rings | 0.0017 to 0.0033 |
| Oil Control Rings | 0.0024 to 0.0083 | |
| Piston Ring Groove Height | Compression Rings | 0.0602 to 0.0612 |
| Oil Control Ring | 0.1589 to 0.1598 | |
| Piston Ring Groove Diameter | No.1 Compression Ring | 3.48 to 3.49 inch |
| No.2 Compression Ring | 3.45 to 3.46 inch | |
| Oil Control Ring | 3.53 to 3.54 inch |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.