How to Replace a Thermostat in a Car:One: Removing the Old ThermostatStep 1. Wait for the engine to down if you drove recently. Step 2. Take the cap off of your radiator. Step 3. Put a drip pan underneath your radiator's drain plug. Step 4. Drain half of the coolant out from your radiator's drain valve. Step 5. Unbolt the thermostat housing from the engine block with a ratchet. Step 6. Pull the old thermostat out with a pair of pliers.Two: Installing the New ThermostatStep 7. Get a replacement thermostat and gasket with the same heat rating. Step 8. Remove any residue from the housing and engine flanges with a scraper. Step 9. Put the thermostat in the engine flange so the valve points up. Step 10. Line the new thermostat gasket up on the flange. Step 11. the housing back onto the engine.Three: Refilling the CoolantStep 12. Pour coolant into the reservoir up to the fill line. Step 13. Screw on the radiator cap to . Step 14. Start your vehicle's engine to run coolant through the system. Step 15. Top off your coolant once your engine cools down again.Part Number :AJ811793AJ810214Adaptability :For 2009 - 2010 Ja-guar XF Base, Premium 4.2L V8 - Gas, 5.0L V8 - GasFor 2006 - 2008 Ja-guar S-Type Base 4.2L V8 - GasFor 2006 - 2009 Ja-guar Super V8 Base 4.2L V8 - GasFor 2004 - 2009 Ja-guar Vanden Plas Base 4.2L V8 - GasFor 2004 - 2009 Ja-guar XJ8 Base, L 4.2L V8 - GasFor 2006 - 2009 Ja-guar XJR Base 4.2L V8 - GasFor 2007-2009 Ja-guar XK Base 4.2L V8 - GasFor 2007 - 2009 Ja-guar XKR Base, Portfolio 4.2L V8 - GasFor 2003 - 2006 Ja-guar XK8 Base, Victory Edition 4.2L V8 - GasFor 2007 Ja-guar S-Type Base 4.2L V8 - GasFor 2006 Ja-guar S-Type Base, VDP Edition 4.2L V8 - GasColour: BlackMaterial: PlasticPackage Contents:1 * Thermostat housingOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.