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 MANUALSVOLKSWAGEN1999PASSAT SYNCRO SEDAN (3B2) V6-2.8L (AHA)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON RING, ENGINE
1999 Volkswagen Passat Syncro Sedan (3B2) V6-2.8L (AHA)
Piston Ring, Engine
1999 Volkswagen Passat Syncro Sedan (3B2) V6-2.8L (AHA)SECTION Piston Ring, Engine
DIMENSIONS
Piston Ring Groove Clearance:
New:
Compression Rings 0.02-0.08 mm (0.0007-0.0031 inch)
Oil Scraper Ring 0.02-0.08 mm (0.0007-0.0031 inch)
Wear Limit:
Compression Rings 0.10 mm (0.0039 inch)
Oil Scraper Ring 0.10 mm (0.0039 inch)
Piston Ring End Gap:
New:
1st Compression Ring 0.35-0.50 mm (0.1377-0.0196 inch)
2nd Compression Ring 0.50-0.70 mm (0.0196-0.0275 inch)
Oil Scraper Ring 0.25-0.50 mm (0.0098-0.0197 inch)
Wear Limit:
1st Compression Ring 1.0 mm (0.0393 inch)
2nd Compression Ring 1.4 mm (0.0551 inch)
Oil Scraper Ring 0.80 mm (0.0315 inch)
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.