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 MANUALSJEEP2009GRAND CHEROKEE 4WD V8-5.7LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
2009 Jeep Grand Cherokee 4WD V8-5.7L
Piston Ring, Engine
2009 Jeep Grand Cherokee 4WD V8-5.7LSECTION Piston Ring, Engine
Piston Ring Gap And Groove Clearance
Ring Gap:
Top Compression Ring 0.40 - 0.55 mm (0.015 - 0.021 in.).
Second Compression Ring 0.24 - 0.51 mm (0.009 - 0.020 in.).
Oil Control Rails 0.15 - 0.66 mm (0.0059 - 0.0259 in.).
Side Clearance:
Top Compression Ring 0.04 - 0.09 mm (0.001 - 0.0035 in.).
Second Compression Ring 0.04 - 0.08 mm (0.001 - 0.0031 in.).
Oil Ring Rails 0.06 - 0.21 mm (0.002 - 0.008 in.).
Ring Gap:
Top Compression Ring 0.40 - 0.55 mm (0.015 - 0.021 in.).
Second Compression Ring 0.24 - 0.51 mm (0.009 - 0.020 in.).
Oil Control Rails 0.15 - 0.66 mm (0.0059 - 0.0259 in.).
Side Clearance:
Top Compression Ring 0.04 - 0.09 mm (0.001 - 0.0035 in.).
Second Compression Ring 0.04 - 0.08 mm (0.001 - 0.0031 in.).
Oil Ring Rails 0.06 - 0.21 mm (0.002 - 0.008 in.).
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.