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Home >> Chevrolet >> 2017 >> Suburban 3500 HD LS >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling 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
Engine Coolant Air Bleed Pipe O-Ring Seal
Engine Coolant Manifold Gasket
Engine Coolant Thermostat Housing Seal
Thermostat Housing Gasket
Water Pump Gasket
Reusable Threaded Fastener Tightening Specifications

NOTE:

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

Application Specification
Metric (English)
Coolant Heater (L83, L86) 50 N.m (37 lb ft)
Engine Coolant Air Bleed Pipe Bolt (L96) 12 N.m (106 lb in)
Engine Coolant Fan Rear Fan Shroud Bolt (L83, L86) 7 N.m (62 lb in)
Engine Coolant Fan Shroud Bolt (L96) 17 N.m (13 lb ft)
Engine Coolant Manifold Fastener (L83, L86) 25 N.m (18 lb ft)
Engine Coolant Thermostat Housing Bolt (L96) 15 N.m (11 lb ft)
Radiator Upper Mount Bracket Bolt (L83, L86, L96) 25 N.m (18 lb ft)
Surge Tank Bolt (L83, L86, L96) 10 N.m (89 lb in)
Surge Tank Nut (L83, L86, L96) 10 N.m (89 lb in)
Thermostat Housing Bolt (L83, L86) 10 N.m (89 lb in)
Water Pump Bolt (L83, L86) 10 N.m (89 lb in)
Water Pump Bolt (L96)
  • First Pass:
15 N.m (11 lb ft)
  • Second Pass:
30 N.m (22 lb ft)