AfterMarketNews AfterMarketNews Auto Care Pro AutoCareCareerHub Brake&Frontend BodyShopBusiness Counterman EngineBuilder Fleet Equipment ImportCar Motorcycle & Powersports News Servicio Automotriz Shop Owner Tire Review Tech Shop Tomorrow's Tech Underhood Service Speedville

Automotive Pet Peeves 2: Reader Feedback Is Overwhelming

How many auto repair pet peeves are out there? Well, enough of them that one article wouldn’t hold them all. I’ve received so many emails, texts and phone calls about my article in the February issue that I thought: why not put everyone’s pet peeve...

Read more...

Air Filter Show & Tell: Seeing Is Believing

Air filters are normal wear items that ­require regular checks and ­replacement. Their role is to trap dirt particles that can cause damage to engine cylinders, walls, pistons and piston rings. In fuel-injected vehicles, the air filter also plays...

Read more...

Searching For 'Black Holes': Job Totals Reveal Missed Selling Opportunities

The concept for Maintenance Chronicle is simple: We ask one shop to record their maintenance sales for a two-week period, and then we see what we learn from the results. This edition of Maintenance Chronicle also proved to be valuable for the shop we...

Read more...

Saab: Fuel Sending Unit Replacement

The 2006 Saab 9-3 Sport sedan came in on the hook and the tow truck driver said, “I think it needs a fuel pump.” The gas gauge was reading less than a quarter of a tank and the low fuel warning light wasn’t on, so a quick fuel pressure check was...

Read more...

KIA: Brake Light On, Tachometer And Speedometer Inoperative

Applicable Models: 2001 Kia Optima LX, 2.4L Complaint The customer states the red brake light is illuminated on the instrument cluster. The ­customer also states the tachometer and speedometer intermittently stop working. Cause Confirmed the customer’s...

Read more...

Mazda: Fuel System Servicing Precaution

Applicable Models: 2004-’07 Mazda3 2005-’07 Mazda6 2006-’07 MX-5 vehicles During service/removal of fuel system parts on the above vehicles, the memory of the malfunctions and the long-term fuel trim need to be cleared by either removing the...

Read more...

Notice: Annual Lift Inspection Labels Stolen

The Automotive Lift Institute, Inc. (ALI), an ANSI accredited product certification body, has announced that 200 of its Annual Inspection labels were stolen when the vehicle of an ALI Certified Lift Inspector was broken into and vandalized near Buffalo,...

Read more...

Mac Tools Donates to Breast Cancer Research Fund through Sales of ‘Wrenching for a Cure’ Products

Mac Tools has made donations of more than $30,000 to The Stefanie Spielman Fund for Breast Cancer Research and over $4,000 to The Breast Cancer Society of Canada. Mac Tools would like to thank their franchisees and customers for their purchases...

Read more...

What R-1234yf Means for Service, Equipment, Safety

For shops, R-1234yf means several new procedures, a certification and new equipment in order to properly handle these new systems. Why the difference in handling and servicing R-1234yf systems versus R-134a? Flammability. Don’t be alarmed, because...

Read more...

Diagnostic Dilemma: The Case of the Missing Code

When doing mobile diagnostic work, no-code stalling complaints are a major part of your agenda. In most cases, the client shop is simply too busy to duplicate the failure or, in some cases, a long test drive will yield nothing in the way of useful...

Read more...

Secondary Ignition: The Art of Spark

What is a coil? From the beginning of the internal combustion engine, several different ignition systems have been used to create a high-energy spark. The most popular system, and the one that’s in use today, is a step-up coil. A coil is nothing...

Read more...

Diagnosing Catalytic Converter Failure Symptoms

Although construction can vary according to engine application, the common three-way catalytic converter contains a reduction and oxidation stage. To create maximum surface area, each stage is generally a ­ceramic or stainless steel honeycomb substrate...

Read more...

Home News Tech Tip: BMW’s Power Reduction and Vanos Faults Are Stored In DME

Print Print Email Email

Affected models:

E82 and E88 (1 Series) with N51, N52K and K54 engines ­produced from January 2008

E90 and E91 (3 Series) with N52 engine produced from March 2005 through June 2006

E90, E91, E92 and E93 (3 Series) with N51, N52K and N54 engines produced from July 2006

E85 and E86 (Z4) with N52 engine produced from January 2006

E83 (X3) with N52K engine produced from September 2006

E60 and E61 (5 Series) with N52, N52K and N54 engines produced from March 2005

E70 (X5) with N52K engine ­produced from October 2006

E71 (X6) with N54 engine ­produced from January 2008.

The “Service Engine Soon” (MIL) lamp is illuminated and a power reduction is clearly perceptible. This situation can occur after driving for some time with the engine already at full operating temperature. If the ignition is cycled, the engine then usually performs normally.

The following faults are stored in the DME:

• 2A82 VANOS intake – stiff, jammed mechanically

• 2A87 VANOS exhaust – stiff, jammed mechanically

• 3100 Boost-pressure control, deactivation – boost-pressure buildup prohibited (N54 only).

The VANOS faults can be caused by an insufficient oil pressure supply to the inlet VANOS adjustment unit. To effectively move the camshafts to the target positions in the specified time and under all engine conditions, sufficient oil pressure supply to the VANOS control pistons must always be available.Fig. 1

When the engine operation requires that the VANOS quickly advance or retard the intake or exhaust camshaft, fault 2A82 or 2A87 may be set if the camshaft is “late,” or does not reach the target position. In this situation, engine power may be reduced and a check control message is displayed. The consequential fault 3100 can be set in the DME fault memory as well.

Service Procedure:

1. Perform all applicable test plans completely for the faults stored. A mechanical restriction or electrical failure of the VANOS solenoid and/or the electrical circuit can cause insufficient oil supply to the VANOS assemblies as well. If the completed test plans results are inconclusive, then proceed to step 2. See Fig. 1.

2. The oil filter cap insert may have been inadvertently removed during the vehicle’s last oil service. If this insert is not installed, it will result in non-filtered engine oil being supplied to the engine, thus possibly clogging or damaging the VANOS solenoids.

If the oil filter cap insert is found to be missing, the entire oil filter housing cap must be replaced (refer to the EPC).

Note: Repairs related to step 2 are not considered a defect in materials or workmanship.

3. Replace both VANOS solenoids (P/N 11 36 7 585 425), change the engine oil and filter (P/N 11 42 7 566 327) and reset the service data only when applicable, as outlined in the Warranty Information section. Drive the vehicle to verify effectiveness.Fig. 2

If excessive wear to the camshaft bearing ledge is found, it is only necessary to replace the camshaft hook ring seals and the affected camshaft bearing ledge. N51, N52 and N52K intake camshaft bearing ledges and hook ring seals cannot be replaced separately. Cylinder head replacement requires a TeileClearing PuMA case.Fig. 3

Camshaft Bearing Ledge Wear Assessment:

While performing the test plan for the VANOS faults stored (ABL-DIT-B1214_NGNWA or E), the inspection of the camshaft hook ring seals is advised.Fig. 4

Figs. 2, 3 and 4 are illustrations of worn camshaft bearing ledges and the acceptable wear of the camshaft bearing ledge.

Note the deep grooves worn into the camshaft bearing ledge by the camshaft hook ring seals in Fig. 3. The camshaft bearing ledge is worn.

Fig. 4 shows acceptable camshaft bearing ledge — minor gray wear marks from the rotation of the camshaft are normal. If deep grooves are not apparent, the camshaft bearing ledge is acceptable and should not be replaced.

Courtesy of Mitchell 1.

 

The following two tabs change content below.

Brake and Front End Staff

Latest posts by Brake and Front End Staff (see all)

Latest articles from our other sites:

Snap-on Offers Optional European Coverage For New Software Upgrade 15.2

Working on European cars can be a challenge and the last thing that technicians need is being let down by their diagnostic tool. That’s why Snap-on continues to increase its optional European coverage...More

MOOG Hub Assemblies Now Feature Several Application-Specific Enhancements

MOOG hub assemblies from Federal-Mogul Motorparts are now available with several new application-specific enhancements designed to provide superior durability and performance and trouble-free ABS system...More

Saab: Fuel Sending Unit Replacement

The 2006 Saab 9-3 Sport sedan came in on the hook and the tow truck driver said, “I think it needs a fuel pump.” The gas gauge was reading less than a quarter of a tank and the low fuel warning light...More

Lithium: An Element That Is Charging Ahead

What is an EMV? As you read the hybrid and plug-in articles that my company, ACDC, is writing this year, we have coined a new term: EMV (electric motor vehicle). Rather than use hybrid, plug-in hybrid,...More

Notice: Annual Lift Inspection Labels Stolen

The Automotive Lift Institute, Inc. (ALI), an ANSI accredited product certification body, has announced that 200 of its Annual Inspection labels were stolen when the vehicle of an ALI Certified Lift...More

Snap-on Offers Optional European Coverage For New Software Upgrade 15.2

Working on European cars can be a challenge and the last thing that technicians need is being let down by their diagnostic tool. That’s why Snap-on continues to increase its optional European coverage...More

Ultimate Underhood: Chrysler Slant Six

While the Chrysler Slant Six did not have the raw power of the Hemi, it was just a sophisticated. The Slant Six went into production in 1960 and lasted until 1983. The 30º tilt was borrowed from Mercedes-Benz...More

Lithium: An Element That Is Charging Ahead

What is an EMV? As you read the hybrid and plug-in articles that my company, ACDC, is writing this year, we have coined a new term: EMV (electric motor vehicle). Rather than use hybrid, plug-in hybrid,...More