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 MANUALSBUICK1987CENTURY CUSTOM, 4D SEDAN, 2.5 RREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMCATALYTIC CONVERTERSERVICE PROCEDURESSHELL REPLACEMENT
1987 Buick Century Custom, 4D Sedan, 2.5 R
Shell Replacement
1987 Buick Century Custom, 4D Sedan, 2.5 RSECTION Shell Replacement
- Remove the bottom cover by making a shallow cut close to the bottom outside edge. See Fig 1 . A shallow cut is required to avoid damage to inner shell.
- Remove insulation and check inner shell for damage. If damage to inner shell is found, entire catalytic converter must be replaced.
- If no damage is found, position new insulation into replacement cover. Apply a heat resistant sealer around edge of cover, using extra sealer at front and rear of pipe openings.
- Install replacement cover on converter and position retaining channel along edges. Complete installation by attaching clamps, provided with replacement cover, to both ends of converter and tighten.
RENDER: 1.0x
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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.