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.
2016 Buick EnvisionFACTORY OEM SERVICE PROCEDURE
Fastener Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Catalytic Converter Brace Bracket Fastener (Lower) | 25 N.m | 18 lb ft |
| Catalytic Converter Brace Bracket Fastener (Upper) | 22 N.m | 16 lb ft |
| Catalytic Converter Heat Shield Fastener | 1.5 N.m | 13 lb in |
| Exhaust Front Pipe Bracket Fastener | 22 N.m | 16 lb ft |
| Exhaust Front Pipe Fastener | 22 N.m | 16 lb ft |
| Exhaust Manifold Brace Fastener | 25 N.m | 18 lb ft |
| Exhaust Manifold Fastener | 20 N.m | 15 lb ft |
| Exhaust Manifold Heat Shield Fastener | 14 N.m | 10 lb ft |
| Exhaust Muffler Rear Hanger Bracket Fastener | 22 N.m | 16 lb ft |
| Exhaust Muffler Shield Fastener | 1.5 N.m | 13 lb in |
| Exhaust Pipe Front Hanger Bracket | 9 N.m | 80 lb in |
| Exhaust Rear Underbody Heat Shield Fastener | 1.5 N.m | 13 lb 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.