2021 Chevrolet Corvette 2D ConvertibleFACTORY OEM SERVICE PROCEDURE

Fastener Specifications

Single Use Non-Threaded Fasteners/Components

NOTE:

All fasteners/components listed in this table MUST BE DISCARDED and replaced with NEW after removal.Β 

Application
Catalytic Converter Gasket
Exhaust Manifold Gasket
Single Use Threaded Fastener/Component Tightening Specifications

NOTE:

All fasteners/components listed in this table MUST BE DISCARDED and replaced with NEW after removal.Β 

Application Specification
Metric (English)
Exhaust Manifold Bolt
First Pass: 27 N.m (20 lb ft)
Second Pass: loosen 180 degrees
Final Pass: 23 N.m (17 lb ft)
Reusable Threaded Fastener Tightening Specifications

NOTE:

All fasteners listed in this table can be reused after removal.Β 

Application Specification
Metric (English)
Catalytic Converter Brace Bolt 22 N.m (16 lb ft)
Catalytic Converter Heat Shield Bolt 10 N.m (89 lb in)
Catalytic Converter Nut 58 N.m (43 lb ft)
Exhaust Control Valve Actuator Bolt 10 N.m (89 lb in)
Exhaust Hanger Bracket Bolt 22 N.m (16 lb ft)
Exhaust Heat Shield Bolt 8 N.m (71 lb in)
Exhaust Heat Shield Bolt
With GPF
10 N.m (89 lb in)
Exhaust Manifold Heat Shield Bolt 10 N.m (89 lb in)
Exhaust System Rear Nut 22 N.m (16 lb ft)
Exhaust System Washer 1.5 N.m (13 lb in)
Exhaust Muffler Hanger Bracket Bolt 22 N.m (16 lb ft)
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.