Fix Coolant Leaks: 2009 Mercury Grand Marquis LS 4.6L V8 FlexFuel

Mercury Grand Marquis Model Years - 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011

1. Getting Started - Prepare for the repair

2. Set Up Paper - Position paper and mark wheels

3. Assess Leak - How to determine if the leaking fluid is coolant

4. Open the Hood - How to pop the hood and prop it open

5. Find Reservoir - Locate the coolant reservoir and clean it

6. Check Level - Determine the coolant level

7. Fix Minor Leaks - Easy way to tackle minor coolant leaks

8. Replace Cap - Secure the coolant reservoir cap

9. More Info. - Additional information on minor coolant leaks

Author

Hans Angermeier is an ASE certified Maintenance and Light Repair Technician and has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road. Over the past 10 years, Hans has been focused on building CarCareKiosk, which is visited by millions of drivers each month.

Share on   Share on Twitter   Share on Facebook
Parts & Tools
We may earn a commission from qualifying purchases as an Amazon Associate
Video Description

Follow the steps in this video to see how to fix minor coolant (antifreeze) leaks in your 2009 Mercury Grand Marquis. Leaking coolant / antifreeze is one of the more common types of leaking fluid from Grand Marquis engines. Engine coolant (which is also called antifreeze or anti-freeze) moves through the inside of your Grand Marquis engine and keeps it from overheating. Coolant / antifreeze can leak from the reservoir, radiator or any hose, in 2009 Grand Marquis with the 4.6 liter engine. However, a coolant leak (aka an antifreeze leak) is most likely to occur where the hoses connect to the engine or radiator. Otherwise, your Grand Marquis may have a radiator leak. This video shows you where the coolant reservoir, hoses and connections on your 2009 Grand Marquis LS are located and the steps needed to fix minor leaks.

A few things to note about coolant is that it is sweet tasting and highly toxic, so it can end up in the dog's stomach pretty quickly. If you ignore a small coolant leak long enough, you will run out of coolant, which leads to an overheated engine and other serious, but highly avoidable, problems. An anti-freeze leak can cause the temp sensor to record high engine temperatures in a 2009 Mercury Grand Marquis. Always protect yourself with safety glasses and gloves when working with the coolant on your Grand Marquis.

  • Advance Auto coupon for
    20% off entire order: KIOSK20
2009 Mercury Grand Marquis LS 4.6L V8 FlexFuel Air Filter (Engine) Replace

Replacing a dirty air filter can improve gas mileage by up to 4%. Isn't efficiency great?

2009 Mercury Grand Marquis LS 4.6L V8 FlexFuel Transmission Fluid Add Fluid

If your transmission is running low on fluid, be sure to add some - find out how to do this here!

2009 Mercury Grand Marquis LS 4.6L V8 FlexFuel Lights Center Brake Light (replace bulb)

Don't be the guy with your third brake light burnt out

2009 Mercury Grand Marquis LS 4.6L V8 FlexFuel Battery Replace

Did you know that heat is worse for your battery than cold? Replace it every 4 years