🔧 Thermostat - Replacement

The thermostat on your Equinox is part of the engine cooling system and controls when coolant starts flowing to the radiator. A stuck thermostat can cause overheating, poor heater performance, or slow warm-up. This job involves draining some coolant, removing the thermostat housing, and refilling and bleeding the system.

Difficulty Level: Intermediate | Estimated Time: 2-3 hours

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⚠️ Safety & Precautions

• Let the engine cool completely before opening the cooling system.
• Never remove the coolant cap when the engine is hot. Pressurized hot coolant can cause serious burns.
• Use jack stands if you raise the vehicle. Do not rely on a jack alone.
• Keep coolant away from children and pets.
• Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Metric socket set
• Ratchet
• Extension bar
• Torque wrench
• Pliers
• Drain pan
• Funnel
• Catch bottle or clean container
• Flat-blade screwdriver
• Shop towels
• Safety glasses
• Nitrile gloves
• Jack stands

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Thermostat assembly - Qty: 1
• Thermostat housing gasket or seal - Qty: 1
• Engine coolant - Qty: 1-2 gallons
• Upper radiator hose clamp - Qty: 1 if damaged

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully.
• Set the heater to full hot before draining the coolant.
• If the front of the vehicle needs to be raised, support it securely with jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain enough coolant

• Place a drain pan under the radiator drain area.
• Open the coolant reservoir cap slowly.
• Drain enough coolant to get the level below the thermostat housing.
• Catch and reuse clean coolant only.

Step 2: Remove intake ducting if needed

• Use a flat-blade screwdriver or the correct socket to remove the air inlet duct or snorkel if it blocks access.
• Set the parts aside in order.

Step 3: Remove the thermostat housing

• Locate the thermostat housing at the engine coolant outlet.
• Use the correct metric socket and ratchet to remove the housing bolts.
• Carefully pull the housing away and remove the old thermostat and seal.
• Wipe the mating surfaces clean with shop towels.

Step 4: Install the new thermostat

• Install the new thermostat and new seal in the correct orientation.
• Make sure the seal is seated evenly all the way around.
• Install the housing by hand first to avoid cross-threading.
• Use a torque wrench to tighten the housing bolts to 10 Nm (89 in-lbs).

Step 5: Reinstall removed intake parts

• Put the air ducting back in place.
• Use the flat-blade screwdriver or correct socket to secure all clamps and fasteners.

Step 6: Refill the cooling system

• Use a funnel to refill the system with the correct engine coolant.
• Fill the reservoir to the proper mark.
• Leave the cap off for the initial bleed.

Step 7: Bleed air from the system

• Start the engine and let it idle.
• Set the HVAC to hot and the blower to low.
• Watch the coolant level and add as needed.
• Let the engine reach operating temperature.
• When the upper hose gets hot and cabin heat is steady, install the reservoir cap.
• Top off slowly to avoid air pockets.

Step 8: Check for leaks

• Inspect the thermostat housing, hoses, and reservoir for leaks.
• Use a flashlight and shop towels to check for drips.
• Shut the engine off and let it cool.

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✅ After Repair

• Recheck coolant level after the engine cools completely.
• Drive the vehicle and confirm normal operating temperature.
• Check the heater output and look for any warning lights.
• Reinspect for coolant leaks the next day.

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💰 DIY vs Shop Cost

Shop Cost: $350-$650 (parts + labor)

DIY Cost: $60-$160 (parts only)

You Save: $290-$490 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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