Bmw n62 vanos replacement


  • Common Problems Associated With The BMW’s VANOS System
  • Reasons Behind BMW VANOS Damage From Certified Technicians in Chattanooga
  • DIY: BMW Single Vanos Rebuild Kit
  • The following items will need to be removed: 1. Air Box 2. Air Duct, Radiator Fan, and Shroud 3. Cabin Filter Housing E39 Only 4. Picking up from this point, begin by pulling off the plastic cover over the intake camshaft. Rotate the engine in a clockwise direction until the intake and exhaust camshaft lobes on cylinder 1 are pointing towards each other as shown.

    At about the position, there is a TDC mark on the crankshaft pulley and on the front of the engine. Rotate the engine in either direction as required so these two marks align. You may need to use a mirror and flashlight in order to see them clearly.

    Safely raise and support the vehicle. From underneath, locate the hole for the crankshaft locking pin. It is on the driver side rear of the engine block, just above the oil pan. Remove the plug from the hole and insert the locking pin. Back on the top side, remove the three valve cover studs on the rear of the cylinder head, and note the cast square on the end of each camshaft.

    Slide the exhaust camshaft locking fixture identified by the bolt hole towards the center of the cylinder head onto the square end of the exhaust camshaft. The exhaust camshaft has a hex cast into it in the middle so you can engage an open end wrench.

    If necessary, rotate the camshaft slightly back and forth until the camshaft locking fixture sits flat against the cylinder head.

    Install the intake camshaft locking fixture in the same manner as the exhaust, rotating the intake camshaft back and forth as necessary until the locking fixture sits flat against the cylinder head.

    Once both camshaft fixtures are in place and flat against the head, secure them together with the bolts and connecting piece that are included with the tool. Remove the banjo bolt that holds the oil line to the Vanos 1 , and unplug the Vanos solenoid connector 2. Remove the engine lift bracket. It is held on by two bolts, one on top and one hidden underneath just on top of the coolant flange.

    Locate the vacuum pipe that runs across the front of the Vanos and remove the two nuts that hold it in place arrows. We are performing this repair on an S52 engine. Some models may not have this vacuum pipe, but instead a cable bracket which you will need to remove. Disconnect the vacuum hose from the diverter valve, then pull the vacuum pipe forward slightly, out of the way as shown. Remove the two Vanos exhaust sprocket access caps.

    Place a rag underneath just in case you drop one, then remove the four exhaust cam sprocket bolts. The lower two are accessed through the sprocket cap holes.

    Be sure and remove the rag when you are done. Press down on the timing chain tensioner, then insert a locking pin or similar tool through the tensioner housing and onto the chain pad. This will relieve tension on the chain. Remove all of the remaining Vanos mounting nuts. Depending on model, such as the S52 we are working on, some nuts will already be removed. Engage the turning tool into the exhaust cam sprocket, then simultaneously rotate the sprocket clockwise and pull the Vanos off the cylinder head.

    Removal is complete. Place the Vanos unit on a clean work surface, then remove the five piston cover plate bolts. Pull the piston cover plate and piston out of the Vanos housing, then thoroughly clean all of the components. Closely inspect the cylinder walls of the Vanos housing. Marks or discoloration from the Vanos piston seal is normal, but the cylinder walls should be smooth and free from grooves or pitting. Carefully cut the Teflon sealing ring and the o-ring underneath, then remove them from the piston groove.

    Be extremely careful not to score the piston groove. The original Teflon seal and o-ring will be difficult and dangerous to remove with any other type of device other than the fine tip of an exacto knife.

    Be careful not to score or scratch the surface or the groove of the piston. After removing both the Teflon sealing ring and the o-ring, thoroughly clean the piston groove. Install the new o-ring into the piston groove. Prepare the new Teflon sealing ring by dipping it into a container of warm water for a few minutes, or even holding it in between your hands. Start the Teflon sealing ring on one side, then guide it around and into the groove.

    As it nears the opposite side, you will feel tension build on the sealing ring as it reaches the point shown in the picture on the right. Hold the seal here, then continue with Step 8. Using your fingers, keep constant tension on the Teflon sealing ring and slowly pull on it until it slips around the top of the piston and fully seats in the piston groove.

    If you are not installing an ECS bearing ring or performing the anti-rattle repair, continue with reassembly on the next page.

    Coat the Teflon sealing ring with clean engine oil, then start the piston back into the housing at an angle as shown. Carefully rotate the piston fully into the cylinder, then line up the bolt holes on the cover plate with the holes in the Vanos housing.

    Install all five bolts until they are all threaded in fully, then tighten them in an alternating pattern to 10 Nm 7 Ft-lbs. Push the transfer gear and piston all the way into the Vanos housing. For correct Vanos timing, you must make sure that the transfer gear remains in this position during installation. You are now ready to reinstall the Vanos unit! Skip to Page 39 to continue. As you can see with what you already have apart, the piston protrudes through the cover plate, and the transfer gear which is secured to the piston , is splined to the intake camshaft and sprocket.

    When the Vanos is assembled, the piston cover plate is fixed to the Vanos housing. When oil is directed to the front side of the piston, it is pushed outward, resulting in the transfer gear being pushed into the camshaft sprocket. When oil is directed to the back side of the piston, it is pushed back into the piston cylinder, resulting in the transfer gear being pulled back out of the camshaft sprocket.

    Since the transfer gear has two sets of angled teeth that are splined to the intake camshaft and sprocket, the in and out motion in turn causes the camshaft to be advanced or retarded. The key to solving this problem is to remove the axial play tighten , and ideally, provide a slight preload on the roller bearings.

    Due to very strict tolerances and the different rates of component wear from car to car, some fine tuning may be required. After bearing ring installation, you may find that the bearings are still slightly loose axial play , that they are too tight not good , or that they have no axial play and a slight preload perfect. If necessary, adjustments are made by removing material from either the new bearing ring tightening the bearing or the bearing race loosening the bearing.

    This is a very critical adjustment, approximately. To check for axial play, hold the piston stationary with one hand and gently move the transfer gear in and out with the other. Side — to — side, or radial play, which is felt by moving the transfer gear left and right in relation to the piston, is normal.

    When bearing clearance is properly set, you should feel a smooth, even resistance when holding the piston and rotating the transfer gear. For Vanos rattle to be eliminated, there should be no clearance between the roller bearings, the bearing race, and the end washers. What is the difference between the original bearing ring and the new ECS bearing ring, if an adjustment may still need to be made after installation?

    The new ECS Tuning bearing ring is actually much narrower than the original, getting the adjustment very close, so fine tuning is a quick and easy procedure.

    This illustration shows the cause of axial play in the bearings. The bearings are too loose due to clearance between the roller bearings, the bearing race, and the end washers.

    The bearing ring in this case is, in effect, too wide. The bearings are tightened and clearance is eliminated by decreasing the width of the bearing ring. In this illustration, the bearings would be too tight. The bearing ring in this case is, in effect, too narrow. In this situation, since you cannot increase the width of the bearing ring, to solve the problem you will loosen the bearings by decreasing the width of the bearing race.

    The piston cap must be removed so we can get to the components inside. You must not damage or distort the piston in any way, or it will be ruined, so be careful. If you have nylon vise jaws, they will work perfect, and the only other alternative is a couple pieces of wood as we are using here. Look closely at the hex on the end of the piston cap. These sockets have the chamfered end machined off so they can grip the shallow hex.

    Using a regular socket will result in a damaged piston cap. Hold pressure inward on the socket to prevent it from slipping, then loosen the piston cap.

    Once you have loosened the piston cap, reposition the piston and cover plate so they are secured horizontally in the vise. Unthread and remove the piston cap. Lift out the first end washer and roller bearing. Remove the transfer gear retaining bolt. Note that this bolt is LH thread, so it loosens in a clockwise direction. If this is the initial installation of the bearing ring, remove the original bearing ring from the line up and replace it with the new one, then skip to Step 12 on Page If you have already installed the new bearing ring and need to tighten the bearing, proceed with step 10 on the next page.

    If you have already installed the new bearing ring and need to loosen the bearing, skip to step 11 on the next page.

    To tighten the bearing when axial play or no preload is present — sand the bearing ring using the following procedure: 1. Place a sheet of grit sandpaper on a solid, flat surface.

    VANOS modifies the intake and exhaust valve of the engine, allowing both valves to open and close in response to your driving.

    This gives engine performance a massive boost, resulting in a smoother ride as well as more torque and precise engine timing. In this model, the intake camshaft is the only timing system that is modified and the exhaust camshaft is left untouched. Failure of the single VANOS system will incur the following symptoms: poor driveability, lowered horsepower, rough idling, low fuel efficiency.

    However, if the problem continues after solenoid repair, then it is likely the VANOS actuator has failed which will need servicing and repair. This helps to improve emissions and helps your engine to warm up faster. S54, n Dual VANOS has far more fault codes than the single VANOS system which include: P — camshaft position actuator P — camshaft position sensor circuit 2A intake camshaft 2A87 exhaust camshaft The symptoms of failure include loss of low range power, engine hesitation, rough idling, trouble cold-starting, and limp acceleration.

    P-fault codes are often associated with dual VANOS failures, but you should also rule out issues with your actuator and sensors too.

    Unlike single VANOS, which typically needs full replacement, repairing the dual system usually only requires solenoid replacement. Dual VANOS with Valvetronic The addition of Valvetronic to the dual system means that not only are the valves opened and closed in response to driving conditions, but also by how much.

    This allows for vastly-improved engine performance, lowered emissions, and great fuel economy. As it includes another part, there are more fault codes for the Valvetronic system than the previous two systems. We are your local experts in German engineering and will make sure your BMW drives as well as it did the day it left the factory floor. Call us today for an appointment or stop in to talk to a specialist.

    In this model, the intake camshaft is the only timing system that is modified and the exhaust camshaft is left untouched. Failure of the single VANOS system will incur the following symptoms: poor driveability, lowered horsepower, rough idling, low fuel efficiency.

    However, if the problem continues after solenoid repair, then it is likely the VANOS actuator has failed which will need servicing and repair. This helps to improve emissions and helps your engine to warm up faster. S54, n As you can see with what you already have apart, the piston protrudes through the cover plate, and the transfer gear which is secured to the pistonis splined to the intake camshaft and sprocket. When the Vanos is assembled, the piston cover plate is fixed to the Vanos housing.

    When oil is directed to the front side of the piston, it is pushed outward, resulting in the transfer gear being pushed into the camshaft sprocket. When oil is directed to the back side of the piston, it is pushed back into the piston cylinder, resulting in the transfer gear being pulled back out of the camshaft sprocket.

    Since the transfer gear has two sets of angled teeth that are splined to the intake camshaft and sprocket, the in and out motion in turn causes the camshaft to be advanced or retarded.

    The key to solving this problem is to remove the axial play tightenand ideally, provide a slight preload on the roller bearings.

    Due to very strict tolerances and the different rates of component wear from car to car, some fine tuning may be required. After bearing ring installation, you may find that the bearings are still slightly loose axial playthat they are too tight not goodor that they have no axial play and a slight preload perfect.

    If necessary, adjustments are made by removing material from either the new bearing ring tightening the bearing or the bearing race loosening the bearing. This is a very critical adjustment, approximately. To check for axial play, hold the piston stationary with one hand and gently move the transfer gear in and out with the other. Side — to — side, or radial play, which is felt by moving the transfer gear left and right in relation to the piston, is normal.

    When bearing clearance is properly set, you should feel a smooth, even resistance when holding the piston and rotating the transfer gear. For Vanos rattle to be eliminated, there should be no clearance between the roller bearings, the bearing race, and the end washers. What is the difference between the original bearing ring and the new ECS bearing ring, if an adjustment may still need to be made after installation?

    The new ECS Tuning bearing ring is actually much narrower than the original, getting the adjustment very close, so fine tuning is a quick and easy procedure.

    This illustration shows the cause of axial play in the bearings. The bearings are too loose due to clearance between the roller bearings, the bearing race, and the end washers. The bearing ring in this case is, in effect, too wide.

    Common Problems Associated With The BMW’s VANOS System

    The bearings are tightened and clearance is eliminated by decreasing the width of the bearing ring. In this illustration, the bearings would be too tight. The bearing ring in this case is, in effect, too narrow. In this situation, since you cannot increase the width of the bearing ring, to solve the problem you will loosen the bearings by decreasing the width of the bearing race.

    The piston cap must be removed so we can get to the components inside. You must not damage or distort the piston in any way, or it will be ruined, so be careful. If you have nylon vise jaws, they will work perfect, and the only other alternative is a couple pieces of wood as we are using here. Look closely at the hex on the end of the piston cap. These sockets have the chamfered end machined off so they can grip the shallow hex.

    Using a regular socket will result in a damaged piston cap. Hold pressure inward on the socket to prevent it from slipping, then loosen the piston cap. Once you have loosened the piston cap, reposition the piston and cover plate so they are secured horizontally in the vise.

    Unthread and remove the piston cap. Lift out the first end washer and roller bearing. Remove the transfer gear retaining bolt.

    Reasons Behind BMW VANOS Damage From Certified Technicians in Chattanooga

    Note that this bolt is LH thread, so it loosens in a clockwise direction. If this is the initial installation of the bearing ring, remove the original bearing ring from the line up and replace it with the new one, then skip to Step 12 on Page If you have already installed the new bearing ring and need to tighten the bearing, proceed with step 10 on the next page.

    If you have already installed the new bearing ring and need to loosen the bearing, skip to step 11 on the next page. To tighten the bearing when axial play or no preload is present — sand the bearing ring using the following procedure: 1.

    Place a sheet of grit sandpaper on a solid, flat surface. Rotate the ring 90 degrees, and repeat the sanding procedure. Flip the ring over and repeat the sanding procedure.

    DIY: BMW Single Vanos Rebuild Kit

    Rotate the ring 90 degrees and repeat the sanding procedure. This procedure will remove a very small amount of material, approximately. Thoroughly clean the bearing race and continue with step 12 on the next page To loosen the bearing when excessive force is required to rotate piston — sand the bearing race using the following procedure: 1. Posted mastermechanwpadmin BMW is an iconic manufacturer with a long history of luxury cars. They are known for their brilliance in the field of engineering.

    With some of the most classic and stunning designs on the market, and some of the smoothest driving around, BMWs are a firm favourite nationwide.

    When it comes to the aforementioned incredible driving, one part becomes essential: the VANOS system. This system is responsible for making the drive feel powerful and yet smooth.


    Bmw n62 vanos replacement