Transmission Oil Cooler Line Replacement (7.4L with MT643/MT653)

Transmission Oil Cooler Line Replacement (7.4L with MT643/MT653)

Removal Procedure




1. Remove the bolts, the washers, the nuts, and the clips that secure the oil cooler lines to the following parts:

* The engine
* The transmission
* The frame rail brackets

2. Remove the nuts securing the oil cooler lines to the radiator and the transmission.

* Plug the ends of the oil cooler lines with a lint-free material.
* Plug the openings to the radiator with a lint-free material.

3. Remove the nuts securing the oil cooler lines to the oil filter adapter.

* Plug the ends of the oil cooler lines with a lint-free material.
* Plug the openings to the oil filter adapter with a lint-free material.

4. Remove the oil cooler lines from the vehicle.

Installation Procedure




1. Install the oil cooler lines to the vehicle.

Notice: Refer to Fastener Notice in Cautions and Notices.

2. Install the nuts in order to secure the oil cooler lines to the oil filter adapter.

Tighten the nuts securing the oil cooler lines to the oil filter adapter to 30 Nm (22 lb ft).

3. Install the nuts in order to secure the oil cooler lines to the radiator and the transmission.

Tighten the nuts securing the oil cooler lines to the transmission and the radiator to 25 Nm (18 lb ft).

4. Remove the plugs from the following parts:

* The ends of the oil cooler lines
* The radiator openings
* The oil filter adapter

5. Install the bolts, the washers, the nuts, and the clips in order to secure the oil cooler lines to the following parts:

* The engine
* The transmission
* The frame rail brackets

6. With the engine running, check the oil cooler lines and the connections for leaks.