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 MANUALSCADILLAC1999SEVILLE SLS V8-4.6L VIN YREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON, ENGINE
1999 Cadillac Seville SLS V8-4.6L VIN Y
Piston, Engine
1999 Cadillac Seville SLS V8-4.6L VIN YSECTION Piston, Engine
| Width of Compression Ring Groove-Top Ring | 0.048 - 0.049 Inch (in) |
| Width of Compression Ring Groove-Second Ring | 0.060 - 0.061 Inch (in) |
| Width of Compression Ring Groove-Oil Ring | 0.119 - 0.120 Inch (in) |
| Piston Diameter @ 40 mm from Top of Piston | 3.6597 - 3.6603 Inch (in) |
| Piston Taper | No Piston Taper Measurement |
| Piston Material | Aluminum |
| Piston Pin Bore Diameter | 0.8662 - 0.8665 Inch (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.