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2003 Chevrolet Malibu Support Question

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Question posted by Anonymous-46480 on December 24th, 2011

How To Change A Thermostat On A 2003 Chevy Malibu

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Answer #1: Posted by marsha1955 on December 24th, 2011 12:47 PM

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marsha1955

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Follow the radiator hose from the radiator to the location where it mounts to the engin. The hose mounts to the engine by clamping to the thermostat housing.

Remove the clamp that secures the hose to the housing. Radiator hose clamps require a specialized tool to remove. If you do not have one, use a pair of pliers to squeeze the two taps on the clamp together . Pull the hose off the thermostat housing. Some fluids may drain onto the engine block. Wipe with shop towel.

Remove the two bolts that hold the thermostat housing onto the Malibu with a 9/16 inch socet and ratchet. Lift the thermostat housing off the vehicle to expose the thermostat.

Pull the old thermostat out of the engine with your fingers and plug the hole with a shop towel. This prevents getting anything into the hole while you clean the engine.

Scrape the old thermostat gasket off the engine block and the bottom of the thermostat housing with a scraper and wire brush.

Clean the mating surface with a shop towel.

Pull the towel out of the engine block and place the new thermostat into the hole. The end with the large spring sets inside the engine. The jiggle valve sits inside the thermostat housing.

Place the new thermostat gasket onto the base of the engine and placee the thermostat housing on top of the gasket. Secure both with the 9/16 inch bolts.

Slide the radiator hose onto the thermostat gasket and secure it with the clamp.

And there you have it....Have a great Holiday!

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Owner's Manual - Page 2

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Owner's Manual - Page 3

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