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Oil Filter Housing Gasket Replacement
 
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Pelican Technical Article:

Oil Filter Housing Gasket Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$65

Talent:

*****

Tools:

Set of sockets, wrenches, screwdrivers

Applicable Models:

BMW Z3 Coupe/Conv (1996-02)

Parts Required:

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

Hot Tip:

Work with a cool engine.

Performance Gain:

Cleaner engine and correct oil pressure

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. 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. You will need the oil filter housing profile gasket, and for 6-cylinder models the VANOS oil line-sealing washers. It's not a bad idea to grab oil and a filter too. Changing the oil is only a few more steps when doing this repair.

To avoid marring the paint and trim, work with a plastic prying tool or wrap a screwdriver tip with masking tape before prying out body or interior items.

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 you're 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. Do not work on your vehicle if you feel the task is beyond your ability. 

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Models with 4-cylinder engine:

Jack the front of your vehicle. See our tech article on jacking your vehicle.

Using an oil filter socket and a 6Â
Figure 1

Using an oil filter socket and a 6Â" extension, loosen oil filter housing lid until you can see sealing O-ring (green arrow). This allows oil in filter housing and filter to drain into engine oil pan. If you do not do this first, you will leave about a liter of old engine oil behind. Place a drain pan under the left side of your vehicle.

Working below the engine, loosen the three 13mm power steering pulley bolts.
Figure 2

Working below the engine, loosen the three 13mm power steering pulley bolts. (green arrows) Just loosen them, do not remove yet. Remove engine drive belt from alternator and power steering pulley and lay aside. See our tech article on engine drive belt replacing. Remove alternator. See our tech article on alternator replacing.

Now, you can remove the pulley from the power steering pump.
Figure 3

Now, you can remove the pulley from the power steering pump. If pulley is stuck, work it side to side, do not use excessive force.

Now you can remove the two 13mm power steering mounting fasteners.
Figure 4

Now you can remove the two 13mm power steering mounting fasteners. (green arrows) Once the fasteners are removed, lift the power steering pump up and off the engine. Place it aside and out of the way.

Working behind the oil filter housing (yellow arrow), disconnect the oil pressure sensor electrical connector.
Figure 5

Working behind the oil filter housing (yellow arrow), disconnect the oil pressure sensor electrical connector. Press the wire release tab (red arrow) and pull the connector straight off.

Working at the alternator bracket, remove four 13mm bolts (yellow arrows).
Figure 6

Working at the alternator bracket, remove four 13mm bolts (yellow arrows). Mark the bolt locations before removing, they are different lengths and this will help you get them back in the right place later.

Working at the front of the alternator bracket, next to the tensioner, remove one 13mm bolt.
Figure 7

Working at the front of the alternator bracket, next to the tensioner, remove one 13mm bolt. (red arrow). Then remove the bracket from the engine.

Now you can remove the six 10mm fasteners for the oil filter housing.
Figure 8

Now you can remove the six 10mm fasteners for the oil filter housing. (red arrows)

Once the fasteners are removed, lift the housing off the engine.
Figure 9

Once the fasteners are removed, lift the housing off the engine. Make sure your drain pan is in the right place, oil will leak down side of engine.

Thoroughly clean the sealing surface of the oil filter housing.
Figure 10

Thoroughly clean the sealing surface of the oil filter housing. (red arrow) Do not use a metal scraper or razor blade, be sure to use a plastic scraper.

Thoroughly clean the sealing surface of the crankcase.
Figure 11

Thoroughly clean the sealing surface of the crankcase. Do not use a metal scraper or razor blade, be sure to use a plastic scraper. Be sure none of the paper gasket falls into the crankcase.

Once the sealing surfaces are clean.
Figure 12

Once the sealing surfaces are clean. Pull the pressure relief valve out of the crankcase.

Then remove both O-rings from the valve and replace with new.
Figure 13

Then remove both O-rings from the valve and replace with new. (red arrows). These O-rings dry out over time, you can see in this photo one is cracking from the slightest pressure from my pick. Reinstall pressure relief valve, then install oil filter housing with new gasket. Evenly tighten fasteners in a crisscross pattern. Then install alternator bracket to engine and evenly tighten. Be sure to get fasteners in correct holes. Then install remaining items. Once complete top up or change engine oil. Run engine and check for oil leaks.

Models with 6-cylinder engine:

Remove alternator. See our tech article on alternator replacing. Place an oil drain pan under left side of engine.
Working at power steering reservoir, remove reservoir mounting fasteners, then move reservoir toward left side headlight.
Figure 14

Working at power steering reservoir, remove reservoir mounting fasteners, then move reservoir toward left side headlight. (purple arrows)

Working at front of intake manifold, pull evaporative emission purge solenoid off mounting bracket.
Figure 15

Working at front of intake manifold, pull evaporative emission purge solenoid off mounting bracket. It is mounted in rubber bushing and pulls straight off bracket. (purple arrow)

Working below oil filter housing, disconnect oil sensor electrical connectors by squeezing wire release tab and pulling off sensor.
Figure 16

Working below oil filter housing, disconnect oil sensor electrical connectors by squeezing wire release tab and pulling off sensor. (purple arrows)

Using a 36mm socket on a 6Â
Figure 17

Using a 36mm socket on a 6Â" extension, loosen oil filter housing lid until you can see sealing O-ring (green arrow). This allows oil in filter housing and filter to drain into engine oil pan.

Using a 19mm wrench, remove VANOS oil line, (below oil filter housing).
Figure 18

Using a 19mm wrench, remove VANOS oil line, (below oil filter housing). Cover line and opening to prevent dirt from entering VANOS system. (purple arrow)

Remove three power steering pump 13mm fasteners.
Figure 19

Remove three power steering pump 13mm fasteners. (green arrows) Fasteners are different lengths, mark locations for help when reinstalling. With fasteners removed, push power steering pump down and away from oil filter housing bracket.

Remove six 13mm oil filter housing fasteners.
Figure 20

Remove six 13mm oil filter housing fasteners. (purple arrows) Fasteners are different lengths, mark locations for help when reinstalling.

Pull oil filter housing away from engine and remove.
Figure 21

Pull oil filter housing away from engine and remove. Place on workbench, then using a small flathead screwdriver, remove seal.

Clean engine sealing surface (purple arrow), inspect alignment dowels (green arrows), they help you align housing when reinstalling.
Figure 22

Clean engine sealing surface (purple arrow), inspect alignment dowels (green arrows), they help you align housing when reinstalling. Be sure they are in good condition and installed in engine straight. Install new gasket into oil filter housing. Then install oil filter housing onto engine. Be sure to align dowels properly.

Install oil filter housing fasteners in previous locations.
Figure 23

Install oil filter housing fasteners in previous locations. This photo shows orientation of fasteners, top to bottom. Tighten oil filter housing fasteners in a crisscross pattern. Install power steering pump to oil filter housing and tighten fasteners. Install VANOS oil line using new sealing washers. Reconnect oil switch electrical connector. Then reassemble engine in reverse order of procedure. Remember to top up engine oil and check for oil leaks when complete.

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Comments and Suggestions:
Kreno Comments: Right before figure 1, the directions say for the 4 cylinder vehicle to "jack the front." Why is this?? please reply ASAP as I'm doing this repair in the morning.
July 6, 2016
  Followup from the Pelican Staff: Because you have to work from below the engine. - Nick at Pelican Parts  
AGoogleUser Comments: http://www.pelicanparts.com/BMW/techarticles/BMW-Z3/17-ENGINE-Alternator_Replacement/17-ENGINE-Alternator_Replacement.htm

For removing the alternator
May 5, 2016
  Followup from the Pelican Staff: Thanks. - Nick at Pelican Parts  
lazyasstechnician Comments: "power steering pulley and lay aside. See our tech article on engine drive belt replacing. Remove alternator. See our tech article on alternator replacing."

It would be incredibly helpful if you can find a way to linkl that article to this one. I'm not sure on the technicalities but I think it starts with a href=. Check out uthis/u article.
May 5, 2016
  Followup from the Pelican Staff: We are working on adding links where needed. For now, click the top for the main articles and navigate to the article you need. - Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:07:14 AM