M11 Series – Service Manual – 007-025   Lubricating Oil Pan

Front sump oil pans have a block-mounted suction tube, which requires approximately 610-mm [24-in] clearance between the vehicle frame or axle and the cylinder block oil pan mounting flange to remove the oil pan.

If an application will not allow the oil pan to be lowered that much, the suction tube must be removed from the cylinder block before the oil pan can be removed from the chassis.

Remove the oil pan mounting capscrews. Lower the oil pan far enough to allow one hand to reach inside the engine and remove the suction tube mounting capscrew.

Remove the suction tube from the cylinder block, and let it drop into the oil pan.

Remove the oil pan from the chassis.

Remove the capscrews and the oil pan.

WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot steam can cause serious personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

Remove all gasket material from the cylinder block and oil pan surfaces.

Steam-clean the oil pan and dry with compressed air.

Inspect the oil pan, suction tube, and tube braces for cracks or damage.

NOTE: If cracks are found, replace the damaged part. Do not attempt to repair the oil pan by welding.

Inspect the oil transfer tube. Refer to Procedure 007-040.

Inspect the threaded holes for damage. Damaged threads can be chased with the following taps.

NOTE: If the threaded holes can not be repaired with the taps listed above, the oil pan must be replaced.

On front sump oil pans, if the application does not allow approximately 610 mm [24 in] clearance between vehicle frame or axle and the cylinder block oil pan mounting surface during installation, the suction tube and oil pan will need to be installed together as an assembly. Installation requires approximately this much clearance to maneuver the oil pan over the frame or axle and under the block-mounted suction tube when installing the pieces separately. Follow all the steps as outlined on the following pages.

If the application does allow approximately 610-mm [24-in] clearance, install the suction tube first by itself, then the oil pan.

If using the silicone beaded gasket, place the oil pan gasket on the oil pan mounting flange with the words OIL PAN SIDE (1) facing the oil pan.

Apply a 2-mm [1/16-in] bead of sealant, Part Number 3823494, to the oil pan mounting surfaces at the cylinder block to gear housing joint (1)
and flywheel housing to cylinder block joint (2).

Install a new o-ring to the oil suction tube. Use clean 15W-40 engine oil to lubricate the o-ring.

Place a new gasket on the oil pan mounting flange.

Attach the suction tube to the oil pan mounting flange with a piece of wire. This will hold the suction tube and oil pan together as one assembly until the tube is fastened to the cylinder block.

Maneuver the assembly into place under the engine in the chassis.

Align the suction tube with the cylinder block suction tube hole. Reach inside the engine, and start the capscrew into the mounting hole to hold the suction tube in place.

After the capscrew is started in the mounting hole by several threads, the wire holding the suction tube to the oil pan can be removed and the oil pan can be lowered to allow more hand clearance to complete the suction tube installation.

CAUTION  Do not use the capscrew to pull the suction tube into place during installation. Doing so will cause misalignment of the suction tube, which can cause damage to the engine.

Reach inside the engine, and push the suction tube completely up into place in the cylinder block suction tube mounting hole by hand.

Complete the suction tube retaining capscrew installation.

Install the oil pan. Tighten the capscrews in the sequence shown.

Apply a 2-mm [1/16-in] bead of sealant, Part Number 3823494, to the oil pan mounting surfaces at the cylinder block to gear housing joint (1)
and flywheel housing to cylinder block joint (2).

Install new o-rings on the oil transfer tube.

Use clean 15W-40 oil to lubricate the o-rings.

Install the transfer tube in the oil pan.

If using the silicone beaded gasket, place the oil pan gasket on the oil pan mounting flange with the words OIL PAN SIDE (1) facing the oil pan.

Be sure the transfer tube is aligned with the cylinder block suction tube hole when installing the oil pan.

Use a new gasket, and install the oil pan.

Install and tighten the capscrews in the sequence shown.