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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 640 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSTHERMOSTAT REPLACEMENT (3.8L)INSTALLATION PROCEDURE

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Installation Procedure

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Installation Procedure

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Install the thermostat.
Install the gasket and the water outlet housing.
NOTE: Refer to FASTENER NOTICE .
Install the water outlet housing bolt and stud to the water outlet housing.
Tighten

Tighten the water outlet housing bolt and stud to 27 N.m (20 Ib ft).

Fig 1: Water Outlet Housing, Bolt, Gasket & Thermostat
Courtesy of GENERAL MOTORS CORP.
Install the radiator inlet hose to the water outlet housing.

Fig 2: Radiator Inlet Hose & Water Outlet Housing
Courtesy of GENERAL MOTORS CORP.
Use the J 38185 in order to reposition and install the hose clamp to the water outlet housing.
Fill the cooling system. Refer to Draining and Filling Cooling System .
Install the fuel injector sight shield. Refer to FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L36) or FUEL INJECTOR SIGHT SHIELD REPLACEMENT (L67) .
Inspect for leaks.

RENDER: 1.0x

NO RELATED

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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.