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

Woman's Tough Road Leads To Ownership Of Triangle Tires

Women auto shop owners aren’t rare anymore, but the story of Gina Paschall, owner of Triangle Tires in North Carolina, is definitely unique. According to The News & Observer in Raleigh, NC, Paschall, now 51, became a ward of the state at 5 years...

Read more...

Google Your Shop - What Do You See?

Go and enter the name of your shop at Google.com. Try putting quote marks around the name of your shop, like “Main Street Auto Care.” Now try entering the city where you are located with the name of your shop. What did you find? Your shop’s website?...

Read more...

Tennessee Shop Offers Discounts To Customers In Need

Price is often the biggest sticking point in an auto repair job. Some customers just have no feel for what certain services or parts cost, others have perhaps been treated poorly in the past (or are cheap), and some just flat out do not have the money....

Read more...

Vehicle Unit Increase; Import-Rich VIO Are A Boon for Import Specialists

Need a dose of good news for your business? Then hear this: The influx of new vehicles in the market will lay the foundation for bountiful aftermarket service and repair opportunities. And, with import vehicle sales continuing an ­upward climb, there...

Read more...

Honda: Engine Shuts Off, But Power Mode Stays In ‘On’ or ‘Accessory’

Applies To: Honda Insight models with one-push start Customers might complain that when they shift into park and shut off the engine, that the power mode stays in On or Accessory. Honda says the culprit could be a misadjusted shift cable. If the...

Read more...

Import Oil Specification Primer

As engine technology has evolved and fuel efficiency standards have tightened, oil specs have increased in importance. Using the wrong viscosity could set a fault code in some applications or interfere with the normal operation of the variable valve...

Read more...

Hunter Releases New Technical and Training-Specific Channel on YouTube

Hunter Engineering Company has launched a new technical and training channel on YouTube, called the Hunter Learning Channel. The Hunter Learning Channel features extensive training video playlists for every product category manufactured by Hunter....

Read more...

Ingersoll Rand Becomes ‘Official Power Tools of NASCAR’

NASCAR and Ingersoll Rand have announced a multi-year partnership designating Ingersoll Rand as the “Official Power Tools of NASCAR.” The multi-faceted agreement also designates Ingersoll Rand as an Official Partner of the International Motorsports...

Read more...

2015 Vehicle Lifting Points Guide Now Available

The Automotive Lift Institute, Inc. (ALI) announces the availability of the 2015 edition of ALI’s “Vehicle Lifting Points for Frame Engaging Lifts.” This updated guide is a quick-reference single-source manual for lifting point information as...

Read more...

Oldsmobile: Engine Overheats, Replaced Engine Coolant Thermostat

Model: 2003 Oldsmobile Alero Complaint The customer states the engine is overheating. Sometimes DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control will be present. Cause Observed the engine coolant temperature...

Read more...

Avoid Alternator Returns, Make Peace With Your Parts Suppliers

If the charging voltage is low, or the alternator isn’t putting out enough current to keep up with the electrical loads that are placed upon it, don’t automatically assume the starter or alternator is bad and needs to be replaced (unless you’re...

Read more...

Solving Carbon Deposits In Direct Fuel Injection Engines

Symptom: Misfire codes, stumbling and suspicious fuel trim numbers. On a scan tool, the engine may show a loss in volumetric efficiency. The driver may complain about a loss of power, poor fuel economy and hard starts. Cause: Carbon deposits on...

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.
Latest articles from our other sites:

Check Out The January Issue Of Brake & Front End Magazine

The digital version of the January issue of Brake & Front End magazine is available online. CLICK HERE to access the easy-to-view digital version that features articles on Alignment Tips, Servicing...More

Redline Detection Unveils New HD PowerSmoke

Redline Detection, a provider of OEM-approved automotive diagnostic leak detection equipment, recently unveiled the HD PowerSmoke for heavy-duty trucks, buses, commercial, industrial and agricultural applications...More

Vehicle Unit Increase; Import-Rich VIO Are A Boon for Import Specialists

Need a dose of good news for your business? Then hear this: The influx of new vehicles in the market will lay the foundation for bountiful aftermarket service and repair opportunities. And, with import...More

Honda: Engine Shuts Off, But Power Mode Stays In ‘On’ or ‘Accessory’

Applies To: Honda Insight models with one-push start Customers might complain that when they shift into park and shut off the engine, that the power mode stays in On or Accessory. Honda says the culprit...More

Hunter Releases New Technical and Training-Specific Channel on YouTube

Hunter Engineering Company has launched a new technical and training channel on YouTube, called the Hunter Learning Channel. The Hunter Learning Channel features extensive training video playlists for...More

Redline Detection Unveils New HD PowerSmoke

Redline Detection, a provider of OEM-approved automotive diagnostic leak detection equipment, recently unveiled the HD PowerSmoke for heavy-duty trucks, buses, commercial, industrial and agricultural applications...More

Oldsmobile: Engine Overheats, Replaced Engine Coolant Thermostat

Model: 2003 Oldsmobile Alero Complaint The customer states the engine is overheating. Sometimes DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control will be present. Cause Observed...More

Avoid Alternator Returns, Make Peace With Your Parts Suppliers

If the charging voltage is low, or the alternator isn’t putting out enough current to keep up with the electrical loads that are placed upon it, don’t automatically assume the starter or alternator...More