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Home >> GMC >> 2021 >> Sierra 2500 HD Denali, 6.6L Eng VIN Y >> Repair and Diagnosis >> Engine Mechanical >> Exhaust System >> Specifications >> Fastener Specifications

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. 

Application
Catalytic Converter Gasket
Exhaust Front Pipe Gasket
Exhaust Manifold Gasket
Exhaust System Seal
Exhaust Turbocharger Inlet Pipe 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. 

Application Specification
Metric (English)
Catalytic Converter Clamp 12 N.m (106 lb in)
Exhaust Manifold Bolt (L8T)
Refer to procedure for tightening sequence and torque values.
Exhaust Manifold Replacement - Left Side (L8T) Exhaust Manifold Replacement - Left Side (L5P) , or Exhaust Manifold Replacement - Right Side (L8T) Exhaust Manifold Replacement - Right Side (L5P) 
Exhaust Pipe Clamp Exhaust Front Pipe Installation
Reusable Threaded Fastener tightening Specifications

NOTE:

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

Application Specification
Metric (English)
Catalytic Converter Brace Bracket Bolt @ Exhaust Front Bracket Lower, Upper (L5P) 25 N.m (18 lb ft)
Catalytic Converter Brace Bracket Bolt @ Exhaust Front Bracket (L5P) 22 N.m (16 lb ft)
Catalytic Converter Heat Shield Bolt (L5P, Long) 10 N.m (89 lb in)
Catalytic Converter Heat Shield Bolt (L5P, Short) 25 N.m (18 lb ft)
Exhaust Bracket Stud 22 N.m (16 lb ft)
Exhaust Front Pipe Nut 50 N.m (37 lb ft)
Exhaust Heat Shield Bolt 9 N.m (80 lb in)
Exhaust Heat Shield Retainer 2.5 N.m (22 lb in)
Exhaust Manifold Heat Shield Bolt 10 N.m (89 lb in)
Exhaust Pipe Heat Shield Bolt 10 N.m (89 lb in)
Exhaust System Rear Nut 45 N.m (33 lb ft)
Exhaust Turbocharger Inlet Pipe Adapter Bolt 58 N.m (43 lb ft)
Turbocharger Heat Shield Bolt 10 N.m (89 lb in)