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 G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 604 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSTHERMOSTAT REPLACEMENTINSTALLATION PROCEDURE

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Installation Procedure

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Installation Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Install a new thermostat housing.
Ensure that the new thermostat housing has an O-ring seal and is in the groove correctly.

Fig 1: Thermostat Housing
Courtesy of GENERAL MOTORS CORP.
Install the water pump inlet (with thermostat).
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the water pump inlet bolts.
Tighten

Tighten the water pump inlet bolts to 15 N.m (11 lb ft).

Fig 2: Water Pump Inlet
Courtesy of GENERAL MOTORS CORP.
Install the outlet hose to the water pump inlet.
Position the outlet hose clamp at the water outlet.
Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .

Fig 3: Installing Outlet Hose To Water Pump Inlet
Courtesy of GENERAL MOTORS CORP.

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.