Usage:
3406B Truck Engines
A new 9Y5589 Oil Pan is available for new 3406B Truck Engines used in trucks with the setback front axle. The new oil pan has the following improvements.
-
- ... Walls are thicker.
- ... Higher grade aluminum alloy is used.
- ... Heat treated for more strength.
- ... Walls are thicker.
In addition, a stiffener plate is used between the oil pan and block.
The new oil pan and the stiffener plate give more rigidity to the bottom surface of the block to which the oil pan is bolted. (The stiffener plate has been used for some time with other oil pans as a sound suppression device on some engines in US-built trucks.) This stronger oil pan and its plate are primarily for trucks expected to operate in severe conditions both off and on the highway.
Depending on the sump location and available space, the new oil pan and plate can be installed on earlier 3406B Truck Engines, including 7FB1-Up. The new parts needed are in a 9Y5590 Oil Pan Group, which is serviced by the parts in the following list. When installing the new pan and stiffener plate on engines without the plate, be sure the correct oil lines group is used and recalibrate the dipstick to reflect the change in the pan mounting location.
- 3-S1588 Bolt
- 3-1W7573 Plug
- 40-2P3205 Bolt
- 3-5M2894 Washer
- 1-9N3167 Stiffener Plate
- 1-9Y5589 Pan
- 2-4N3661 Gasket
- 3-2A3398 Plug Gasket
- 2-3B551 Pipe Plug
- 3-1W7573 Plug
Put 9S3263 Thread Lock on the pipe plugs and tighten to 80 ± 11 N·m (60 ± 8 lb ft).
The following chart is provided for your information. It lists the part numbers of the various oil pans used in 3406B Truck Engine applications.
