Cooler Bypass Valve

Removal
1. Disconnect the battery ground cable.
2. Raise the vehicle on a hoist.





3. Remove the front cooler tube, from the front Cooler Bypass Valve (CBV) fitting.





4. Remove the rear cooler tube from the rear CBV fitting.





5. Note: The rubber-coated sealing washers can fall off during removal of the front CBV bolt cooler line ease fitting.

Remove the front CBV bolt cooler ease fitting.





6. Note: The rubber coated sealing washers can fall off during removal of the rear CBV bolt cooler line ease fitting.

Remove the rear CBV bolt cooler line case fitting.
7. Remove, clean and flush the CBV.

Installation

1. CAUTION: Make sure the 4 rubber-coated sealing washers are on the cooler line case fittings and the CBV washers are in place.

Examine the rubber-coated sealing washers for damage. Replace the washers as needed.
2. Using Threadlock and Sealer E0AZ-19554-AA or equivalent meeting Ford specification WSK-M2G351-A5, coat the line case fitting threads.





3. CAUTION: Make sure the Cooler Bypass Valve (CBV) is properly backflushed. Use dry compressed air to remove solvent.

CAUTION: If the cooler line case fitting is overtightened, the rubber-coated sealing washers and/or cooler line case fittings can be damaged, causing a transmission fluid leak.

Note: The CBV has a check ball in the rear fitting and will only allow flow in one direction. Make sure check ball moves freely.

Note: Align the two rubber-coated sealing washers while assembling the rear cooler line case fitting.

Install the CBV fitting.





4. Note: The cooler lines need to be flushed out at this time.

Tighten the cooler tube nuts.
5. Lower the vehicle.
- Reconnect the battery ground cable.
7. Fill the transmission with Motorcraft MERCON Multipurpose (ATF) Transmission Fluid XT-2-QDX or equivalent meeting MERCON specification. Check for proper operation. MERCON(R) automatic Transmission Fluid is being replaced by MERCON(R) V as a service fluid, as per TSB 06-14-4.