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Mitsubishi Outlander XL 2007 - 2012 Oil Pan Seal Replacement

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Tools (for 4B12/4B11 engines):

  • Screwdriver flat medium
  • screw jack
  • balloon wrench
  • torque wrench
  • Ratchet wrench
  • Extension (with cardan)
  • Head 10 mm
  • Head 12 mm
  • Straight ring wrench 16 mm
  • Straight ring wrench 19 mm
  • Marker
  • Hex wrench for fixing the tensioner (or pin)
  • Wheel chock (shoe)
  • Oil pan puller MD998727
  • Hammer medium
  • Knife (or scraper)
  • Flute brush
  • Metal brush
  • torque wrench
  • Funnel

Tools (for 6B31 engines):

  • Ratchet wrench
  • Head 10 mm
  • Straight ring wrench 19 mm
  • Screwdriver flat medium
  • Oil pan puller MD998727
  • Hammer medium
  • Knife (or scraper)
  • Flute brush
  • Metal brush
  • torque wrench
  • Funnel

Parts and consumables:

  • Engine pan drain plug gasket MD050317 

Sealing gasket MD050317 of the drain plug of the Mitsubishi Outlander XL engine pan

  • Sealant Loctite 5900 or 5970, Three Bond 1217G (1000A923)

Sealant Three Bond 1217G for sealing the oil sump of the Mitsubishi Outlander XL engine block

  • Technical capacity
  • Wire or rope (for 4B12/4B11 engines)
  • Cleaner (or solvent)
  • Degreaser
  • Motor oil
  • rags

Notes:

The oil pan flange is installed with sealant, there is no gasket of any kind. If oil leaks in the oil pan and crankcase connector, tightening the oil pan mounting bolts will not lead to the desired result. You need to know how to remove the engine sump and replace its seal.
Oil pan seal replacement work is shown on the 4B12 engine, but seal replacement on the 6B31 engine is almost the same.

1.  Remove the crankcase and mudguards (lower, front, rear and side) of the engine, as described in  this article .

Placement of the right mudguard of the engine compartment of the Mitsubishi Outlander XL engine

Removed right side mudguard of Mitsubishi Outlander XL engine

2. Drain engine oil as described  here .

Placement of the drain plug on the oil pan of the engine 4B12 Mitsubishi Outlander XL

3.  (4B12/4B11 engines) Remove the accessory drive belt as described  here

Removing the drive belt for auxiliary units of the 4B12 Mitsubishi Outlander XL engine

4. (4B12/4B11 engines) Disconnect the air conditioning compressor solenoid clutch wiring harness from the engine management system wiring harness (shown on the removed air conditioning compressor for clarity).

4B12 Mitsubishi Outlander XL Engine Air Conditioning Compressor Clutch Wiring Location

5.  (Engines 4B12/4B11) Using a 12 mm socket, loosen the bolts securing the air conditioning compressor and electromagnetic clutch assembly in the sequence shown in the figure below (shown on the removed engine for clarity).

The sequence of unscrewing the bolts securing the air conditioning compressor to the engine 4B12 Mitsubishi Outlander XL

Unscrewed lower bolt securing the air conditioning compressor to the engine bracket 4B12 Mitsubishi Outlander XL

6.  (4B12/4B11 engines) Remove the A/C compressor and magnetic clutch assembly from its bracket along with the connected hoses.

Note:

Once removed, use a wire or rope to hang the A/C compressor assembly and hoses on the body in a location where they will not interfere with the removal and installation of the engine tray.

7.1. (engines 4B12/4B11) Turn away bolts of fastening of the oil pallet.

Unscrewing the oil pan bolts of the 4B12 Mitsubishi Outlander XL engine

4B12 Mitsubishi Outlander XL A/C Compressor Bracket Removed Bolts

Removed engine pan bolts 4B12 Mitsubishi Outlander XL

7.2.  (engine 6B31) Loosen the oil pan mounting bolts in the sequence shown in the figure below.

6B31 Mitsubishi Outlander XL engine oil pan bolt loosening sequence

8.  Insert the special oil pan remover (MD998727) into the slot between the oil pan and crankcase. Cut off the sealant by hitting the special stripper.

Oil pan puller MD998727 for 4B12 Mitsubishi Outlander XL engine

Note:

(engines 4B12 / 4B11) The first slot is located to the left of the crankshaft pulley (see photo below), the second is on the diametrically opposite side.

Placement of the slot between the oil pan and the crankcase of the 4B12 Mitsubishi Outlander XL engine

(engine 6B31) The slot is to the right of the crankshaft pulley.

Placement of the slot between the oil pan and the engine crankcase 6B31 Mitsubishi Outlander XL

Using a screwdriver or chisel instead of a dedicated oil pan remover may damage the gasket (sealant) surface and cause oil to leak.

9. Move the special puller along the edge of the oil pan, hitting it to separate the pan from the crankcase.

Separation from the crankcase of the Mitsubishi Outlander XL engine sump

Note:

Do not strike the special puller with great force, otherwise the oil pan flange may be damaged.

10. Remove the oil pan Outlander HL (the first two photos are the 4B12 / 4B11 engine, the third photo is the 6B31 engine).

4B12 engine crankcase with oil pan removed Mitsubishi Outlander XL

Removed engine oil pan 4B12 Mitsubishi Outlander XL

Removed engine oil pan 6B31 Mitsubishi Outlander XL

11.  Check the oil pan for cracks.

12.  Check the oil pan flange (sealant application surface) for damage or deformation. Correct if possible or replace the pan.

13.  Clean the mating surfaces of the crankcase and oil pan flange from the remnants of the old sealant. After cleaning, degrease surfaces to be sealed. Also clean the pan from oil deposits.

Cleaning the oil pan of the engine 4B12 Mitsubishi Outlander XL

Cleaned inner surface of the oil pan around the Mitsubishi Outlander XL drain plug

The result of cleaning the oil pan of the 4B12 Mitsubishi Outlander XL engine

Note:

Degreasing is necessary for better adhesion of the sealant to these parts.

14.  Apply sealant in a continuous strip with a diameter of 2-3 mm along the entire flange of the oil pan (the first two photos are the 4B12 / 4B11 engine, the third photo is the 6B31 engine).

The scheme of applying sealant to the flange of the oil pan of the engine 4B12 Mitsubishi Outlander XL

Sealant applied to the oil pan flange of the 4B12 Mitsubishi Outlander XL engine

The scheme of applying sealant to the flange of the oil pan of the engine 6B31 Mitsubishi Outlander XL

Note:

Do not over-apply sealant, as tightening the bolts may cause sealant to enter the inside of the sump. 

15.  Install and fix the oil pan within 3-5 minutes after applying the sealant. Tighten the oil pan bolts gradually (in several steps) and diagonally (for 4B12/4B11 engines). For the 6B31 engine, the bolt tightening diagram is shown in the second photo below.

Installed engine oil pan 4B12 Mitsubishi Outlander XL

The sequence of tightening the bolts of the pan to the crankcase 6B31 Mitsubishi Outlander XL

Note:

Tightening torques for 4B12 engine bolts: M6 - 10 ± 2 Nm; M8 - 29 ± 2 Nm.
Bolt tightening torques for 6B31 engine: 10 ± 2 Nm.
After installing the oil pan, wait at least an hour before adding engine oil to the engine.

16.  Install a new engine tray drain plug O-ring in the direction shown in the figure below and tighten the drain plug to 39 ± 5 Nm.

Correct installation of the sealing ring of the oil pan drain plug of the Mitsubishi Outlander XL engine

17.  (4B12/4B11 engines) Install the air conditioning compressor and electromagnetic clutch assembly to the engine, tighten the mounting bolts to a nominal torque of 23 ± 6 Nm in the sequence shown in the figure below (shown on the removed engine for clarity).

4B12 Mitsubishi Outlander XL engine air conditioning compressor tightening sequence

18.  (4B12/4B11 engines) Install the accessory drive belt.

4B12 Mitsubishi Outlander XL Auxiliary Drive Belt Installed

19.  Pour oil  into the Outlander HL engine by unscrewing the plug in the cylinder head cover.

Pouring engine oil into the Mitsubishi Outlander XL engine

20. Reinstall the removed engine compartment mudguards.

21.  Check for leaks.

The article is missing:

  • Tool photo
  • Photo of parts and consumables

Source:  carpedia.club

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