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N52 Engine Oil Filter Housing Gasket Replacement
 
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Pelican Technical Article:

N52 Engine Oil Filter Housing Gasket Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$150

Talent:

*****

Tools:

Set of sockets, wrenches, screwdrivers, E10 universal socket

Applicable Models:

BMW X3 Sport Utility (2007-10)

Parts Required:

Oil filter, engine oil, oil filter housing gasket, pressure relief valve O-rings

Hot Tip:

Work with a cool engine.

Performance Gain:

Repair leak at oil filter housing

Complementary Modification:

Change engine oil

If you find an oil leak down the left side of your engine or what looks to be the oil pan, it may be the oil filter housing gasket. The oil filter housing uses a rubber profile gasket and over time it hardens and leaks. When trying to locate the source of an oil leak, always start at the top of the engine, locate any oil covered areas. The cleanest oil covered area is likely the source of leak.

Some folks have said to have found the housing also causing coolant and oil mixing on New Generation (NG6) engines. Keep that in mind if dealing with out mixing.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve as they grow older. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Relieve cooling system pressure by opening reservoir cap. If needed, drain cooling system. Most times I won't drain it. I will remove the housing and catch what leaks in a pan below the engine.

The oil filter housing (red arrow) uses a rubber profile gasket and over time it hardens and leaks.
Figure 1

The oil filter housing (red arrow) uses a rubber profile gasket and over time it hardens and leaks. When trying to locate the source of an oil leak, always start at the top of the engine, locate any oil covered areas. The cleanest oil covered area is likely the source of leak. Remove the intake air housing and ducts. See our tech article on intake air housing and ducts removal, N52 2ngine. Also, if you need extra space, remove the radiator cooling fan; it is not necessary, but can help.

Loosen the oil filter housing lid (red arrow) until you can see sealing O-ring.
Figure 2

Loosen the oil filter housing lid (red arrow) until you can see sealing O-ring. This allows oil in filter housing and filter to drain into engine oil pan.

Using a small flathead screwdriver, unclip upper radiator hose retainer until it reaches the stop (red arrow).
Figure 3

Using a small flathead screwdriver, unclip upper radiator hose retainer until it reaches the stop (red arrow).

Remove hose (red arrow) from oil filter housing.
Figure 4

Remove hose (red arrow) from oil filter housing. Allow coolant to drain into container.

Working at the power steering reservoir, remove the two T45 Torx reservoir mounting fasteners (red arrows).
Figure 5

Working at the power steering reservoir, remove the two T45 Torx reservoir mounting fasteners (red arrows).

Lift the power steering reservoir up and lay aside (red arrow).
Figure 6

Lift the power steering reservoir up and lay aside (red arrow). Disconnect sensor electrical connector by pressing release spring and pulling off (yellow arrow).

Working at the oil cooler, remove the three E10 Torx fasteners (red arrows).
Figure 7

Working at the oil cooler, remove the three E10 Torx fasteners (red arrows). Yellow arrows points to bottom fastener not visible in main photo.

Working at the oil cooler, pull it straight off oil filter housing (yellow arrow).
Figure 8

Working at the oil cooler, pull it straight off oil filter housing (yellow arrow). When installing be sure to align hole in cooler and pin on filter housing (red arrow).

Remove E10 oil filter housing fasteners (red arrow).
Figure 9

Remove E10 oil filter housing fasteners (red arrow). Fasteners are different lengths, mark locations for help when reinstalling. I like to start with the lower fastener, using an 8mm flexible head wrench. The 8mm wrench fits quite well on the E10 fasteners, be sure not to slip if you decide to us an 8mm wrench. This is a good option for folks without External Torx tools.

Remove two top E10 oil filter housing fasteners.
Figure 10

Remove two top E10 oil filter housing fasteners. Fasteners are different lengths, mark locations for help when reinstalling. I like to use a long extension for the fastener under intake manifold. Attach a swivel adapter to your socket to help fit it in (red arrow). I am also using an 8mm socket here. The 8mm socket fits quite well on the E10 fasteners, be sure not to slip if you decide to us an 8mm socket. This is a good option for folks without External Torx tools. Pull oil filter housing away from engine and remove.

Place housing in drain pan or solid surface, then using a small pick remove both profile gaskets.
Figure 11

Place housing in drain pan or solid surface, then using a small pick remove both profile gaskets.

Thoroughly clean oil filter housing mounting surface.
Figure 12

Thoroughly clean oil filter housing mounting surface.

Install new gasket into oil filter housing.
Figure 13

Install new gasket into oil filter housing. Be sure it is pressed all the way in. Do not apply sealant to gasket.

Then install oil filter housing onto engine.
Figure 14

Then install oil filter housing onto engine. Be sure to mounting holes correctly before tightening. Install oil filter housing fasteners in previous locations. I like to start with the bottom fastener, install it as I place housing onto engine. Tighten oil filter housing fasteners in a crisscross pattern. Reconnect oil switch electrical connector.

Before buttoning everything up, inspect all the coolant hoses for oil contamination.
Figure 15

Before buttoning everything up, inspect all the coolant hoses for oil contamination. If any of the hoses are swollen (red arrow), replace them. Then reassemble engine in reverse order of procedure. Remember to top up engine oil and check for oil leaks when complete. Top up engine oil, fill and bleed cooling system. See our tech article on draining and filling your cooling system.

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Page last updated: Tue 11/21/2017 03:13:27 AM