How-To Replace Hydraulic Fan Actuator Average Fix time: 2-3 Hours Difficulty: Intermediate ( Tight spots, and Lots of Fluid everywhere ) So this is for all you Lincoln LS Owners who have the Gen 1 2000-2002 with a Hydraulic Fan. Symptoms : You know your Actuator has gone bad if your Fan is spinning All the time or most of the time Pretty slow. In my case My car when it was Cold the fan would spin slow and then Kick into High mode a few times then eventually stop back to Slow mode again when it made running temperature causing the engine to Overheat. More symptoms include Fan just spinning slowly and never kicking up more. *NOTE* Water in your Hydraulic Fan Fluid can cause the Actuator to go out! Make sure your fluid is a Dark Red Color and not a Pinkish Puke color. (Water caused mine to go out) If you have water in your system. Unbolt the Hydraulic Fan Fluid Reservoir ( To the Passenger side of the engine ) Remove Both Hoses. Spin the Fan Manually by hand and watch the old Fluid drain out. Add fluid as necessarily to the Opposite hose, continue this until you see New fluid. Step 1 *Reservoir* Unbolt the Hydraulic Fan Reservoir and Remove both Hoses attached. Set the Reservoir aside. Step 2 *Under the car you go!* Jack the Lincoln LS up and set it up on jackstands, If you have a creeper this shall help out alot also. Crawl under the car and to the passenger side of the engine near the wheel look up, You will see the Alternator and above that a Hose connected to your hydraulic fan pump. Remove the hose clamp and by hand Pry the Hose off the Pump. Get out from under the car and fish out the hose by hand and set it aside. Step 3 * Removing the Old Actuator * Right above the port where the Hose you just removed went you will see your old actuator. Remove the wiring harness connection and with a T-40 Bit and a small ratchet un bolt the old actuator. Step 4 * New Actuator Install * Proceed by installing your new actuator in by first re-connecting your wiring harness connection and set your new Actuator in the old ones place. Then with your T-40 Socket Start tighting it in. Remember Tight is Tight and Too Tight is broken. You dont have to be super man here and tighten it so no man will ever be able to get it off. This will result in breaking the new actuator and stripping out the Head. Step 5 * Hose back On! * With your New Actuator snugly in place, Grab the hose your set aside earlier and proceed to snake it back down into its proper place where you can the Crawl back underneath your Lincoln ls and Push the Hose back on the Hydraulic Pump Fitting. *NOTE* This could take some time due to it is a VERY tight space and it is hard to get the Hose clamp off much less back on the fitting. Take patience and try not to get frustrated With the Hose clamp in place you are now able to Lower the car back on the ground as normal. Step 6 * Reservoir back in place! Almost ready! * Grab your Fan Reservoir, put the two hoses back on the Reservoir, Replace the Two bolts to hold it to the car and Fill with new ATF Fluid! Step 7 * Fill up and Go * Fill the fluid to the Max Fill level, replace the cap and turn your car ON! With the cars fan Pump running Add more Fluid until it is at the Max Fill level again. You should notice a difference in your Fans speed dramatically. Your Fan should now respond to your RPMS while in Drive or Reverse . I noticed that I could actually hear the Fan from away from the car. Take your car for a test drive and let it run for about 30 to 40 Minutes. If your fan stays constant and everything looks and sounds Better and OK you are good to go! Thought I would put a Tutorial on how to replace this because there wasnt a Thread dedicated to it!