How to Replace Thermostat with Housing Assembly 2008-2013 INFINITI G37

Introduction

This tutorial will guide you through the process of replacing the thermostat with housing assembly in a 2008-2013 INFINITI G37. A faulty thermostat can cause engine overheating, leading to severe damage, so it's crucial to replace it if you notice symptoms like a cool upper radiator hose while the engine is running. This guide covers all necessary tools, steps, and tips for a successful installation.

Step 1: Gather Necessary Tools and Materials

Before starting the replacement, ensure you have all the required tools and materials:

• Phillips Head Screwdriver
• 10mm Socket
• 8mm Socket
• Trim Tool Set
• Hose Pliers
• Pliers
• Ratchet
• Socket Extensions
• Torque Wrench
• Anti-Freeze
• Gloves
• Liquid Thread Locker
• Paper Towels
• Safety Glasses
• Drain Pan
• Floor Jack
• Funnel
• Jack Stands
• Pick
• Wheel Chocks

Practical Tips

• Wear gloves and safety glasses for protection.
• Ensure your vehicle is on a level surface and secure it with jack stands.

Step 2: Prepare the Vehicle

1. Disconnect the Battery

   • Locate the negative terminal of the battery and use a wrench to disconnect it.

2. Lift the Vehicle

   • Use a floor jack to lift the front of the vehicle.
   • Secure the vehicle with jack stands.

3. Drain Coolant

   • Place a drain pan under the radiator.
   • Open the radiator drain valve to allow the coolant to drain completely.

Step 3: Remove the Old Thermostat Assembly

1. Locate the Thermostat Housing

   • Find the thermostat housing which is typically near the engine.

2. Remove Components

   • Use the appropriate sockets to remove any components blocking access to the thermostat housing.
   • This may include hoses, clamps, or brackets.

3. Detach the Thermostat Housing

   • Unscrew the bolts securing the thermostat housing using the 10mm and 8mm sockets.
   • Carefully pull the housing away from the engine.

4. Remove the Old Thermostat

   • Take out the old thermostat from the housing.

Step 4: Install the New Thermostat

1. Clean the Surface

   • Clean the mounting surfaces on the engine and thermostat housing to ensure a good seal.

2. Place the New Thermostat

   • Position the new thermostat into the housing, ensuring it fits snugly.

3. Apply Liquid Thread Locker

   • Apply liquid thread locker to the bolts to prevent them from loosening over time.

4. Reattach the Thermostat Housing

   • Align the housing and bolt it back in place using the torque wrench to tighten to the manufacturer's specifications.

Step 5: Reassemble and Refill Coolant

1. Reconnect Removed Components

   • Reattach any hoses, clamps, or brackets you removed earlier.

2. Refill Coolant

   • Use a funnel to refill the radiator with new anti-freeze, ensuring no air bubbles are trapped.

3. Reconnect the Battery

   • Reconnect the negative terminal of the battery.

Step 6: Test the Installation

1. Start the Engine

   • Start your vehicle and let it idle.
   • Monitor the temperature gauge to ensure it reaches optimal operating temperature.

2. Check for Leaks

   • Inspect around the thermostat housing and hoses for any signs of leaks.

Conclusion

Replacing the thermostat with housing assembly in your INFINITI G37 is a manageable task with the right tools and steps. Remember to monitor the engine temperature post-installation and check for leaks. If you encounter any issues or uncertainties during the process, consult a professional mechanic for assistance. Regular maintenance can help extend the life of your vehicle’s engine and cooling system.