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.
2007 Saturn ION L4-2.0L SCFACTORY OEM SERVICE PROCEDURE
Piston Ring, Engine
Piston Rings
Piston Ring End Gap - First Compression Ring 0.20-0.40 mm (0.008-0.016 in)
Piston Ring End Gap - Second Compression Ring 0.35-0.55 mm (0.014-0.022 in)
Piston Ring End Gap - Oil Control Ring - Rails 0.25-0.76 mm (0.010-0.030 in)
Piston Ring to Groove Clearance - First Compression Ring 0.04-0.08 mm (0.0015-0.0031 in)
Piston Ring to Groove Clearance - Second Compression Ring 0.030-0.069 mm (0.0012-0.0027 in)
Piston Ring to Groove Clearance - Oil Control Ring 0.090-0.106 mm (0.0035-0.0042 in)
Piston Ring Thickness - First Compression Ring 1.170-1.190 mm (0.0461-0.0469 in)
Piston Ring Thickness - Second Compression Ring 1.471-1.490 mm (0.0579-0.0587 in)
Piston Ring Thickness - Oil Control Ring - Rail - Maximum 0.43 mm (0.0169 in)
Piston Ring Thickness - Oil Control Ring - Spacer 1.574-1.651 mm (0.0620-0.0650 in)
Piston Ring End Gap - First Compression Ring 0.20-0.40 mm (0.008-0.016 in)
Piston Ring End Gap - Second Compression Ring 0.35-0.55 mm (0.014-0.022 in)
Piston Ring End Gap - Oil Control Ring - Rails 0.25-0.76 mm (0.010-0.030 in)
Piston Ring to Groove Clearance - First Compression Ring 0.04-0.08 mm (0.0015-0.0031 in)
Piston Ring to Groove Clearance - Second Compression Ring 0.030-0.069 mm (0.0012-0.0027 in)
Piston Ring to Groove Clearance - Oil Control Ring 0.090-0.106 mm (0.0035-0.0042 in)
Piston Ring Thickness - First Compression Ring 1.170-1.190 mm (0.0461-0.0469 in)
Piston Ring Thickness - Second Compression Ring 1.471-1.490 mm (0.0579-0.0587 in)
Piston Ring Thickness - Oil Control Ring - Rail - Maximum 0.43 mm (0.0169 in)
Piston Ring Thickness - Oil Control Ring - Spacer 1.574-1.651 mm (0.0620-0.0650 in)
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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