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, ENGINE
2009 Jeep Grand Cherokee 4WD V8-5.7L
Piston, Engine
2009 Jeep Grand Cherokee 4WD V8-5.7LSECTION Piston, Engine
Piston Dimensions And Clearances
Clearance
Measured at 38.0 mm (1.5 in.) Below Deck 0.031-0.058 mm (0.012-0.023 in.).
Ring Groove Diameter
Top Groove 90.4 - 90.6 mm (3.56 - 3.57 in.)
Second Groove 88.4 - 88.7 mm (3.48 - 3.49 in.)
Weight 413 grams (14.56 oz.).
Piston Length 53.3 mm (2.10 in.).
Ring Groove Width
No.1 1.23 - 1.26 mm (0.048 - 0.0496 in.)
No.2 1.23 - 1.25 mm (0.048 - 0.0492 in.)
No.3 2.03 - 2.05 mm (0.079 - 0.080 in.)
Clearance in Piston 0.005 - 0.014 mm (0.0001 - 0.0005 in.)
Clearance
Measured at 38.0 mm (1.5 in.) Below Deck 0.031-0.058 mm (0.012-0.023 in.).
Ring Groove Diameter
Top Groove 90.4 - 90.6 mm (3.56 - 3.57 in.)
Second Groove 88.4 - 88.7 mm (3.48 - 3.49 in.)
Weight 413 grams (14.56 oz.).
Piston Length 53.3 mm (2.10 in.).
Ring Groove Width
No.1 1.23 - 1.26 mm (0.048 - 0.0496 in.)
No.2 1.23 - 1.25 mm (0.048 - 0.0492 in.)
No.3 2.03 - 2.05 mm (0.079 - 0.080 in.)
Clearance in Piston 0.005 - 0.014 mm (0.0001 - 0.0005 in.)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
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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.