The N52 was predominately found in the E90 i, i and i, and the E60 i and i models, as well as various others such as the i, X1, and Z4 to name a few. The N52 was produced from up until when it was replaced by the turbocharged N20 engine. It is the successor to the M54 which was used in various E36, E39 and E46 models. Given the long production history, BMW was able to perfect many aspects of the engine over the production lifetime.
The engine even won top 10 best engines in both and However, the N52 still has its fair share of common reliability problems. We also wrote an N54 engine problems guide you can read to compare the two! These are the most common engine problems, outside of these problems the car is very reliable and problem free.
However, I will mention one other common, non-engine related issue is the window regulators. This results in the affected window not being to roll up or down. Replacement cost is approx. The VANOS solenoids are responsible for controlling how much oil flows to the cam gears, which in turn controls the opening and closing of the valves.
Failing VANOS solenoids will result in a loss of power, poor idling, bad fuel economy, trouble starting, and the occasional limp mode. These solenoids commonly fail every 70, miles or so.Guida alla tabella di valutazione titoli iii fascia
We recommend replacing them at this interval as they are likely having a negative affect on performance, although you may not know it yet. The 2A82 and 2A87 codes are for the intake and exhaust solenoids. The solenoids are exactly the same, so you just need to purchase 2 of part to replace these. It is most prevalent during cold weather or on short trips. The ticking noise is caused by the hydraulic valve adjusters, also known as lifters, not getting enough oil to function properly.
This is only prevalent in and earlier models. The designs of the lifters and cylinder head was changed in December of which fixed this issue. Most of the time bleeding the lifters is a temporary fix that may work a few times in a row until a more permanent solution is needed.
The permanent solution is to replace the lifters and the cylinder head with the newly designed post parts. The electric water pumps are made out of plastic, which over time normally begins cracking and corroding. The bearings and impellers are also common parts that fail within the water pump.
Water pumps usually fail around the 80k mile mark. We recommend getting a new water pump that has a metal impeller, since we see the impeller being a common cause of failure.The pin which holds the flap in place can slip out and get sucked into the engine, causing serious internal damage.
Plan accordingly based on your experience level. The DISA Valve kits which we have assembled here at ECS Tuning will make the hardest part of the job the easiest since they include all of the hardware necessary for added peace of mind. Before you begin, read and familiarize yourself with these instructions and make sure you have all the required tools on hand.
Open the hood and protect the front bumper and fender with covers, then illuminate your work area. Release all four latches which secure the air box lid to the air box. Gently pry up on the clip on the Mass Air Flow sensor to release the connector, then pull the connector out of the sensor.
Loosen the hose clamp securing the intake boot to the Mass Air Flow sensor, then pull the boot off of the sensor. Remove the air box tube from the air box lid by gently pulling the tube out of the lid, then remove the air box tube from the cowl mounted intake in the same manner.
Release the connector on the DISA valve by pushing in on the retaining clip with your finger, then pull the connector off of the valve. Push the connector and wiring harness off to the side so it is out of the way.
Begin by sliding the DISA valve out of the intake manifold approximately one inch. Place your finger on the valve as shown in the photo and rotate the flap downward until it is closed, if the flap is not closed it will be very difficult to remove from the intake manifold. Turn the DISA valve slightly as shown in the photo in order to gain the necessary clearance to slide it out of the intake manifold, and remove it from the vehicle. Wipe away any contaminants from the gasket surface inside the intake manifold with a clean, lint-free towel.
Place your finger on the valve as shown in the photo and rotate the flap downward until it is closed, and continue to hold the flap closed as you slide the valve into the intake manifold.
Reinstall the air box tube into the air box lid and the cowl mounted intake Reinstall the air box lid onto the air box. Having idle problems and low RPM hesitation?Vrm to pmx
Located on the intake manifold. Includes mounting hardware. Previous Next. View Larger Image. Step 2: Release all four latches which secure the air box lid to the air box. Step 3: Flat Blade Screwdriver Gently pry up on the clip on the Mass Air Flow sensor to release the connector, then pull the connector out of the sensor.
Step 4: Flat Blade Screwdriver Loosen the hose clamp securing the intake boot to the Mass Air Flow sensor, then pull the boot off of the sensor. Step 6: Remove the air box tube from the air box lid by gently pulling the tube out of the lid, then remove the air box tube from the cowl mounted intake in the same manner. Step 7: Remove the air box lid from the vehicle and set it aside. Step 8: Pull the breather hose off of the air intake boot then push the breather hose to the side.
Step 9: Release the connector on the DISA valve by pushing in on the retaining clip with your finger, then pull the connector off of the valve. Step Turn the DISA valve slightly as shown in the photo in order to gain the necessary clearance to slide it out of the intake manifold, and remove it from the vehicle. Installing the new DISA Valve: Step 1: Wipe away any contaminants from the gasket surface inside the intake manifold with a clean, lint-free towel.
Step 2: Press in firmly on the valve to make sure it is fully seated into the manifold. Reinstall the breather hose into the air intake boot Reinstall the air box tube into the air box lid and the cowl mounted intake Reinstall the air box lid onto the air box Reinstall the air intake boot onto the MAF sensor and tighten the hose clamp Reconnect the MAF electrical connector.
Interested in purchasing? Related Posts.On the 6-cylinder M54 engine installed in BMW E83 X3 vehicles, the molded plastic intake manifold is configured as two sets of three runners with variable lengths. Low end torque and high end power are improved by varying the intake runner length according to a map stored in the ECM. Engine vacuum, load and ambient temperature are used by the ECM to determine the rpm at which to switch intake manifold configuration.
The actuator used by the ECM to switch manifold configuration is a vacuum solenoid called the dual resonance intake system or DISA resonance valve valve. At low to mid-range engine speeds up to about rpmengine torque is increased as the DISA resonance valve valve closes a flap inside the manifold, effectively increasing the length of the intake runners.
This opens the resonance flap inside the intake manifold and allows air to be drawn into cylinders through additional intake runners. This provides extra air for the power needed at higher rpms. Another function of the design is that resonance waves inside the manifold pulse back and forth between opening and closing intake valves and help in cylinder filling. A faulty DISA resonance valve valve can cause a number of problems for your BMW X3 with a M54 6-cylinder engine; everything from a check engine light, rattling sounds from the engine, to a rough idle.
When the valve fails, the flap can leak engine vacuum if the seal or diaphragm fail. If the flap fails mechanically, it can come apart and get lodged in the intake manifold, and worst case scenario end up in the engine. 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.Ultimate DISA Fix - Repair kit permanent solution! No more pin!
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.
Intake Manifold Upgrade (N52 Engine)
Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information. If you suspect your DISA resonance valve valve is faulty, remove it to inspect it. Do not take any chances. If you have a rattling at the intake manifold, I would start the diagnosis by checking the valve.
Information on checking the valve is listed below, after removing.Worried about potential repair costs? An extended warranty can provide peace of mind. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently BMW X3 problems occur, check out our car reliability stats. See most expensive repairs Worried about potential repair costs?
Chart based on 54 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Assumed it was leaking from the coolant expansion tank common problem for this model so replaced the expansion tank with the OEM version. Also flushed coolant and added new BMW coolant. Oil leak in pan gasket. Over bucks just to change a gasket. Vacuum operated valve in exhaust by muffler not operating. Vacuum line repaired. Noise returned several days later. Internet search shows this to be common; users and dealers hack repair: block vacuum and valve.
Bank 1 sensor had been replaced 5 months earlier. Had crack and was leaking air and causing lean condition. Gasket material was inferior and created intake leak.Ic vicenza 1 » decreto ministeriale 1176 del 27/12/2019
Pulled Disa valve, installed O-ring and resealed valve. Failure attributed to faulty part. Pump was replaced at 80, miles roughly and was replaced with aftermarket part. No codes were noted and coolant level was full.
DISA BMW repair kit
Not sure what happened. Same oxy sensor again shown as faulty on OBC.The cause: The original plastic Disa valve components wear and often snap causing the symptoms noted above.
The pin retaining the flap can also pop out entering the engine! The likely cause of the faults noted above and most common cause is the weak plastic components within the DISA valve unit vibrating together and wearing causing the flap to operate at the wrong times and eventually leading to destruction of the flap plate.
The pieces of this flap can even enter the engine often causing severe engine damage; likewise the metal pin that holds the flap plate in position can vibrate loose and enter the engine. The solution: Fit our improved design billet aluminium flap kit, designed to never fail, save the cost of a replacement DISA valve which will only fail again.
Using our kit, the weak components of the DISA valve flap and crank lever are replaced with our many times stronger billet aluminium parts, retained by our precision machined screw, which tightly holds the two components together; eliminating wear and the need for the retaining pin which can enter the engine. Our part is completely redesigned to never fail- OEM clearances are reduced minimising vibrations in the part, preventing any future failure.
Our kit also includes a high temperature Viton 75 O-ring to create a good seal between the DISA unit and the manifold, eliminating any air leaks. Our components described herein with the assistance of our supportive instruction media will allow you to replace the faulty components which always fail within the DISA unit, without having to replace it with another OEM part that is going to fail again due to the same manufacture faults.
There may be a rattling, buzzing or clicking noise coming from the engine. Fault codes: lean condition P, Pfront oxygen sensor lean P, P oxygen sensor slow response P, P and cylinder misfire PP fuel control mixture lean bank 2 sensor 1 and p system too lean, showing? Many good reviews have already proved the quality of this product.
Read some of the latest reviews from real buyers. This is the lowest price we have found online. Click Here and order yours right now. Your email address will not be published. Repair Guy. We're proud to be the top local provider of Mobile Small Engine Repair, and we're committed to creating satisfied customers. Call one of our friendly staff now to inquire about your costs, price, estimate, quote cost to service lawn mower, snowblower tune ups and repair, snowblower repair tune up, snowblower repair mobile, snowblower repair home service, toro snow blower repair, craftsman snowblower repair.
Related Articles. Leave a Reply Cancel reply Your email address will not be published.The valve is responsible for controlling air as it moves through the intake, resulting in improved performance. The DISA valve controls the path the air moves through the intake system and into the engine.
The valve uses a flap which opens and closes to either shorten or lengthen the path the air takes to get to the cylinder chamber. Given the path is shorter, there is less space for air.
The end result is more pressurized air, which is in turn more combustible.
Prior to entering the engine, intake air flows through the intake manifold. The manifold is what distributes the intake air into the 6 separate cylinders of the engine.
This causes any air flowing in to bounce back off of the valve and back into the manifold. After bouncing backwards off of the valve, it then bounces off the other end, sending the air back towards the valve.
For the most efficient engine performance, you want that air to bounce back towards the valve and reach it at the exact same time the valve is opening again. This is where the DISA valve comes into play. The most tell-tale sign of a bad valve is a loud rattling noise coming from the intake system. As the seals on the valve wear down, air can slip past the valve in open and closed positions, causing a loud rattle.
By this point, you will also start to notice bad performance, lack of power, etc. The valve is made of plastic and has a metal pin that holds it in place. If the valve or pin breaks, plastic or the metal rod can get sucked into the engine, which will totally wreck your whole engine. The DISA valve will normally only last 70, miles.
We highly recommend replacing it or rebuilding it at this mileage to prevent any catastrophic failures. I have a BMW e46 engine w43 4 cylinder. It is fitted with the old design disa valve with a round flap. If I close the vacuum hole and release the vacuum the valve opens to the half open position. Can I still use it? Does this cause any damage as the valve is supposed to be closed at the idle position.Dhl api
The car still runs well. I have noticed the fuel cunsumption stays almost the same at 6. Is there something I must check? Serviced new spark plugs replaced MAF and cam sensors and crankcase vacuum relief valve.
Set crank camshaft and sensor timing. It ran at 6. Is this because I now do short distance driving. Also the cruise control jumps out still cable driven and the motor in the cruise unit still runs.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.Warranty — Limited day warranty. The failure is caused by the type of materials used in the manufacture of two of the three key valve components.
The three key components of the DISA are the flat plastic flapper valve which opens and closes depending on engine rpm and throttle position, the bell crank lever that rotates it, and the vacuum pot that actuates the bell crank lever.
As shown in the pictures on the left, the bell crank lever has a male, hex shaped protrusion, which snaps into a matching female pocket on the flapper valve. These hex shaped sections are what allow the rotation of the bell crank lever to rotate the flapper valve. During normal engine operation, vibrations from pressure pulses inside the intake manifold cause the bell crank lever and flapper valve to vibrate against each other where the hex shaped portions contact each other.
These vibrations start a wear process which will cause the tiny glass fibers in the flapper valve to become exposed. Once the fibers become exposed they start to erode away the male hex portion of the weaker bell crank lever. The symptoms of a worn DISA valve include rough idle, lean engine codes and lack of low to mid rpm power.
Once the hex is shape is worn off the lever, the flapper valve no longer opens and closes in a controlled manner by the rotation of the bell crank lever. The brittle flapper valve becomes free to slap around uncontrolled within the DISA support framework.
This uncontrolled movement can lead to complete destruction of the flapper valve. The broken pieces of valve have no where else to go except through the intake manifold runners and through the motor, sometimes resulting in severe engine damage. Even a small piece of plastic broken off the flapper valve can hold an intake valve open, resulting in bent valves or much worse.
Since the only parts on the DISA valve that typically fail are the flapper valve, bell crank lever and housing seal, why replace the entire unit. The plastic crank lever has been replaced with a black anodized T6 aluminum bell crank lever that is four times stronger than the stock part it replaces.
Locking the parts together prevents any possible movement and wear between the two pieces, the 1 cause of failure in the stock design. The titanium pivot screw also replaces the stock steel pin of the original design. Since the pin is part of the pivot screw, and the pivot screw is held captive from outside the DISA housing, there is no longer a possibility of a steel pin coming loose and getting sucked into the engine.
OEM running clearances are reduced to minimize vibrations. All parts are precision CNC machined to very close tolerances. The Kit also includes these key features: The kit is installable by anyone with basic mechanical skills, using basic hand tools. Very detailed step by step instructions are provided using the link below. Remember, a new stock DISA can still fail prematurely. Remember me Log in. Lost your password? T40 Torx driver 2. Small pair of diagonal cutters. Optional — Small soft bristle stainless steel or brass wire brush.
Optional — Small 90 degree pick tool. What comes in the kit: 1 Aluminum flapper valve. There is a steel pin in the end of the DISA housing shown partially removed in the next picture that can come loose and fall into the manifold during removal. Make sure that the pin is still in place on your DISA after removal.
If not, Do not start the engine again until the pin is located. Make sure that this pin is still in the DISA after removal. If not, it has probably fallen into the intake manifold as you removed the DISA.
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