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Discussion Starter #1
1996-2004 Mustang Manual Transmission
Mizu Radiator and Fan Shroud Install
as performed by Bullitt5339

Tools Required

8mm socket or wrench
10mm socket or wrench
12mm socket or wrench
4mm hex head wrench
Hose clamp or slip joint pliers
Wire cutters/Strippers
Soldering Iron with solder
Heat-Shrink Wrap

Installation Instructions
1. Disconnect the vehicle battery using an 8mm wrench or socket.
2. Raise the vehicle using ramps or jack up the vehicle and support it on jack stands, ensuring you are on a flat, stable area.
3. Drain the existing coolant using the drain petcock located on the passenger’s side lower radiator. Ensure that you properly contain and dispose of used coolant.
4. Remove the coolant reservoir by removing the 3-12mm nuts located on the top of the tank and removing the 2 coolant lines attached to the reservoir.

5. Remove the coolant reservoir tank.

6. Remove the radiator cover by pulling the 4 push pins. Some vehicles have push pins with a Phillips screw in the center. In this case, loosen the center retaining screw and then remove the entire cover by lifting gently.


7. Remove the upper and lower radiator hoses from the radiator using hose clamp pliers or slip joint pliers and move them out of the way. Upper radiator hose removed completely in the pictures for clarity, but is not necessary.

8. Unplug the factory wiring harness from the cooling fan. 2001+ vehicles will have an additional sensor shown in this picture. It does not need to be unplugged, it will be removed with the radiator and not used.

9. Remove the upper radiator mounts using a 10mm socket or wrench.

10. Remove the factory radiator and fan together by gently sliding them up and out of the vehicle. Tilting the radiator may be necessary to clear the battery.

11. Prepare your new Mizu radiator for installation by fitting the fan shroud. The fan shroud may require some slight adjusting by bending the brackets to seat properly. Attach the fan shroud to the radiator using a 4mm hex head wrench.

If your vehicle is equipped with Anti-lock brakes, you must relocate the ABS pump rearwards about 1” at this point. You do this at your own risk, no instructions provided for this task. Pictures will be provided for reference and comparison purposes only.

12. Install your Mizu radiator by sliding it into the factory mounts and attaching the factory upper radiator mounts. This vehicle has an ABS delete manifold which had to be relocated to provide adequate clearance. Pictures provided of a factory 1999 Mustang GT ABS pump installed for comparison.

13. Re-Install the upper and lower radiator hoses and the coolant reservoir. All connections are in the factory locations.


This wiring process relies on the ECU’s high speed fan turn-on and turn-off temperature to control the Mizu fan’s operation. Low speed fan turn-on settings will no longer function. Depending on your car, you may want to adjust the high speed fan turn on temperature using a hand-held tuner. All adjustments on this car were made using an SCT SF3/X3 and set at 185 degrees. Neither Mizu Cooling Solutions nor assume any responsibility for how you decide to actuate your cooling fans.

14. Cut the factory plug off of your stock fan. It should have 2 or 3 wires depending on the year. If it is a 3 wire connection, we only need the orange and black wire, the red wire can be removed.


15. The cooling fans on the supplied Mizu fans feature bullet-style connectors. These can be used, but the preferred method is to solder and heat-shrink wrap all electrical connections. In the supplied configuration, the fans are designed to operate in the proper configuration, sucking air through the radiator. Attach both black wires from the cooling fans, lengthening as needed to attach to the factory black wire pictured above. Attack both blue wires using the same method to the orange wire pictured above. Solder and shrink-wrap all connections and zip tie them securely out of the way of any moving parts.

16. Check all coolant and electrical connections for proper installation.

17. Fill the radiator using a mix of 50% Antifreeze, 50% Water.

18. Reconnect the battery.

19. Start the vehicle and check for coolant leaks. If none are found, let the vehicle run long enough to reach the high speed fan turn on temperature. Since ours was programmed to 185 degrees, we hooked up to a scan-tool and monitored the ECT (engine coolant temps) closely. Most handheld tuning devices can also be used to monitor ECTs using the Datalog function. Verify that once the high-speed fan temperature is reached both fans turn on and function properly. They should be blowing air towards the engine, not back toward the radiator. If they do not blow towards the engine, reverse the fan wiring and re-check for proper operation.

20. Verify coolant level is still correct. Because of air pockets in the system, it’s advisable to check the coolant level after every drive cycle to ensure the level is still correct.

21. Test drive the vehicle to ensure there’s no overheating, and again, verify the absence of leaks and the proper coolant level.

Enjoy the enhanced cooling and good looks of your new Mizu Radiator and Fan Shroud.


7,401 Posts
It was a fairly uneventful install, which is always nice........:bigthumbsup
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