Parts Catalog Accessories Catalog Tech Info Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
VANOS Solenoid Block Replacement
 
Bookmark and Share

Pelican Technical Article:

VANOS Solenoid Block Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$260

Talent:

***

Tools:

22mm wrench, E5 Torx, 4mm Allen

Applicable Models:

BMW Z4 Coupe/Conv (2006)

Parts Required:

VANOS solenoid, filter, O-rings

Hot Tip:

Work with a cool engine

Performance Gain:

Remedy fault codes and restore engine performance

Complementary Modification:

Replace in pressure valve filter

To improve engine breathing at a variety of rpms, thus improving fuel efficiency, emissions and power, BMW engines are designed with VANOS, an acronym based on the German words VAriable NOckenwellenSteuerung or variable camshaft timing. Though a number of VANOS systems have been designed and implemented, the basic principle behind all of them is the need to change the relative timing between intake and exhaust valve opening. The VANOS actuator on each camshaft is supplied with engine oil under pressure; a solenoid controlled by the engine control module (ECM) retards or advances camshaft timing by modifying the supply of pressurized oil to the VANOS actuator.

Intake valves:

  • Retarded during idle, improves smoothness of idle.
  • Advanced during part-throttle acceleration, improves torque and emissions.
  • Retarded at full-throttle, improves high power production.

Exhaust valves:

  • Retarded during deceleration so that more exhaust can stay and mix with the cylinder charge, thus diluting the mixture, lowering combustion temperature and reducing NOx in the exhaust. This is similar to the effect of exhaust gas recirculation (EGR).
  • Advanced during warm-up phase in order to allow rapid warm-up and more efficient operation of catalytic converters.

BMW S54 engines utilize one main VANOS (variable camshaft timing) solenoid, mounted to the front of cylinder head. They are responsible for direct oil flow to the VANOS actuator and can become restricted over time on high mileage engines. The VANOS solenoid block can become restricted with debris, causing issues with the VANOS system. Pressure may vary causing rough idling, hard start and maybe VANOS noise.

Possible related fault codes:

P0010 (BMW xx, 0xxx): Vanos intake solenoid circuit

P0011 (BMW 67, 0x43): Vanos intake timing over advanced

P0012 (BMW 72, 0x48): Vanos intake timing over retarded

Pxxxx (BMW 184, 0xB8): Vanos intake position control

P1525 (BMW xx, 0xxx): Vanos intake solenoid open circuit

P0013 (BMW xx, 0xxx): Vanos exhaust solenoid circuit

P0014 (BMW 22, 0x16): Vanos exhaust timing over advanced

P0015 (BMW 21, 015): Vanos exhaust timing over retarded

Pxxxx (BMW 185, 0xB9): Vanos exhaust position control

P1531 (BMW xx, 0xxx): Vanos exhaust solenoid open circuit

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. 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. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Working at the front bottom of the cylinder head, disconnect the VANOS solenoid electrical connector (red arrow).
Figure 1

Working at the front bottom of the cylinder head, disconnect the VANOS solenoid electrical connector (red arrow). Press the release tabs and pull the connector straight off.

Place a drain pan under the front of engine and rag (red arrow) under the VANOS solenoid.
Figure 2

Place a drain pan under the front of engine and rag (red arrow) under the VANOS solenoid.

Remove the five 4mm Allen fasteners (red arrows).
Figure 3

Remove the five 4mm Allen fasteners (red arrows). When removing the final fastener, support the VANOS solenoid from below.

Remove the final fastener (blue arrow), then remove the VANOS solenoid block (red arrow).
Figure 4

Remove the final fastener (blue arrow), then remove the VANOS solenoid block (red arrow).

Remove the VANOS solenoid gasket (red arrow) from the VANOS actuators, it will pull off.
Figure 5

Remove the VANOS solenoid gasket (red arrow) from the VANOS actuators, it will pull off. Reverse steps to install new solenoid. Continue to clean solenoid block.

Remove the four E5 external Torx fasteners (red arrows).
Figure 6

Remove the four E5 external Torx fasteners (red arrows).

Remove the electrical solenoid from the block.
Figure 7

Remove the electrical solenoid from the block. Then, using a 22mm wrench, loosen the VANOS pressure relief valve (blue arrow). Unscrew and remove the pressure relief valve from the VANOS unit.

Next, use a large magnet to open the valve.
Figure 8

Next, use a large magnet to open the valve. Attach the magnet to each post (blue arrows). With the magnet attached, the valve will open. Clean one port at a time. Spray brake cleaner into the corresponding bore (red arrows) and allow it to drain out the pressure valve bore (purple arrow). Clean each bore until only clean spray exits block. Then blow clean with low pressure air. Once clean and dry, use clean engine oil and cycle it through the bores the same way. This will pre-lubricate the block. Reverse steps to install. Be sure gasket is properly aligned when installing. When done, check and top up the engine oil level.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location] [Careers]

Copyright © Pelican Parts Inc.

Page last updated: Mon 12/5/2016 03:01:40 AM