Bmw exhaust flap purpose Jan 3, 2024 · Hi everyone on this forum. This is because the exhaust on our cars is valved, meaning it has a “flap” inside one of the pipes, and can be controlled electronically by the car for various reasons. Oct 15, 2017 · Hi all, First question, when people on here talk about waste gate valve, are they talking about the exhaust flap? Waste gate to me means turbo over pressure release valve? Main question, What does the exhaust flap do, what is its purpose in life? Is it: - Noise reduction only. By Oct 11, 2012 · Reducing exhaust area 50% has an effect vs flap open. The control valve serves different applications and is specifically listed for the 3. - Opens Nov 8, 2023 · The exhaust flap closes at low RPMs and load to keep the engine quiet and opens at higher RPMs / loads to give the engine more noise (and presumably more power). In this comprehensive guide, we will delve into the intricate details of exhaust flaps, including their functions, types, common failures, and associated Diagnostic Trouble Codes (DTCs). The exhaust flap’s sole purpose is to lessen exhaust noise during cold starts and while driving at highway speeds. BMW Exhaust Death Rattle Fix! | F30 Muffler Control Valve Actuator Clip Replacement ThatJamesGuy 3. 2015 bmw 328i xdrive …. Aug 26, 2018 · E39's don't have exhaust flaps, which is why two are capped off on the E39. Anyone got a readout on that? May 29, 2021 · Technical Sections Engine / Drivetrain / Exhaust / Bolt-ons / Tuning Opening exhaust flaps fully Thread Tools Bookmarks twitter Facebook Digg Google StumbleUpon del. Jun 3, 2024 · Exhaust flaps Open / Closed / AutoAll times are GMT -5. I think the problem is that the shaft seizes where it pivots in the pipe. In this way, they trigger the HC (Hydrocarbon) absorbers or bring the starter catalyst to operating temperature more quickly. A more recent method of emission control is the use of DeNOx catalytic converters. 0i engine. Please take a look at the attachment for further information. XBimmers | BMW X3 Forum • BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - 2017) • Second Generation BMW X3 (F25) General Forum • 35i vacuum operated butterfly valve on exhaust? Jul 6, 2020 · I recently pulled the muffler and examined the exhaust flap valve. Sep 20, 2018 · An exhaust flap in front of the muffler is actuated by an electronically controlled servomoter via a cable. The time now is 12:57 PM. I live on the South Coast of England and generally use my bike about once every one to two weeks, lots more during the spring, summer ,autumn months. Easily fix that exhaust rattle on your BMW in less than 5 minutes w/ only 3 tools. Dual valve systems typically offer more precise control over the sound and performance of the exhaust, but may be more demanding to install and maintain. PRICE CUT on ALL FABRICS - Offering the best prices on the best quality reproduction fabrics! If the exhaust flap in you vehicle is stuck open or closed, it's likely that the exhaust actuator is the culprit. Jan 10, 2022 · Exhaust flap actuatorXBimmers | BMW X3 Forum • BMW X3/X4 Forums (2018 - 2024) • BMW X3M (F97) and X4M (F98) General Forum (2018+) • Exhaust flap actuator Aug 15, 2014 · BMW wouldn't have gone to that much trouble unless there were some measurable affect on the emissions. May 17, 2023 · Many BMW models are equipped with an exhaust flap in their exhaust system to reduce noise. The time now is 02:23 AM. In fact, many people who tune their BMWs will do this intentionally. May 13, 2023 · In emission control, exhaust gas flaps are used to divert the exhaust gas flow. Oct 14, 2018 · Hello Guys, I found this thread about an easy fix to keep the exhaust flap (s) open at all times, I have a 2017 540I and I was looking at the exhaust and it appears that the flap is only on the right side unless the left side is much deeper into the exhaust? I started the car, placed in M Sports Mode but I didn't see the flap open at all? Feb 25, 2016 · Exhaust flap To realize an active silencer system, the exhaust system was given a controlled electro-pneumatic exhaust flap at the tail pipe of the main silencer. 32K subscribers Subscribed In addition, the control unit has a special function with which the mechanical stops of the exhaust flaps are retrained. If a better sounding exhaust sound, reduced weight, or improved exhaust flow (power!) are your goals, our BMW exhaust options can significantly improve your BMW street, track or race car. Perceived add'l torque off idle may be no more than faster turbo spin-up due to reduced back pressure. May 12, 2023 · What is BMW exhaust flap for? In emission control, exhaust gas flaps are used to divert the exhaust gas flow. Jan 29, 2025 · What is BMW exhaust flap for? In emission control, exhaust gas flaps are used to divert the exhaust gas flow. I have a 2018, R1200RT and had an MOT at the begin… May 13, 2023 · What is BMW exhaust flap for? In emission control, exhaust gas flaps are used to divert the exhaust gas flow. May 19, 2023 · In emission control, exhaust gas flaps are used to divert the exhaust gas flow. also, do they ever open 100%? Aug 10, 2023 · Sst exhaust flap control **new product**All times are GMT -5. 1. The exhaust flapper valve is a crucial component of the exhaust system that helps optimize engine performance and sound. What does the BMW exhaust flap do? The only reason the exhaust flap is there is for noise reduction during cold starts and to reduce exhaust noise at cruising speeds. You may notice a slightly loader exhaust, but maybe not. Basically my issue was extreme rattling in the exhaust when starting idling and running so basically I had a clip that’s in the vide Exhaust Flap, Exhaust Flapper, Exhaust Butterfly Valve, Exhaust Valve, let’s see how they work and is it worth removing or deleting the exhaust valve from your BMW R1250 series and many other Mar 20, 2023 · Flap exhausts are popular mainly because of their sound. icio. The exhaust flap is open (spring force) in idle setting, the vacuum unit is aerated. The DME control module actuates an electronic switch-over valve which supplies vacuum to a vacuum unit. Noise reduction during cold starts: When you start your car, especially on a cold morning, the engine produces a loud noise due to the combustion process. The special type of exhaust system contributes to increased performance. Thank you for having me. to/3b15cCa (18307620323) Sockets: https://amzn. The time now is 01:35 PM. The exhaust flap on a BMW serves two main purposes: noise reduction during cold starts and minimizing exhaust noise at cruising speeds. The control unit works without any problems with the standard exhaust system. Exhaust flaps are indispensable components of modern vehicle exhaust systems, playing a vital role in optimizing engine performance, enhancing sound characteristics, and maintaining emission standards. All times are GMT -5. The effect is even stronger in combination with a sports exhaust system. Jul 13, 2014 · An exhaust flap in front of the muffler is actuated by an electronically controlled servomoter via a cable. Let me explain these points further. This is necessary, for example when replacing an exhaust flap or when an exhaust flap is to be installed in another exhaust system so that it then functions correctly. Aug 11, 2024 · The daHler BMW Exhaust Flap/Valve Controller is a plug-and-play device that controls the flapper valve and exhaust sound. And I continue my challenge for anyone to find documentation -- or at least a public statement -- from BMW that the exhaust flap has any purpose other than noise reduction. It works by opening or closing the exhaust pathway, allowing or inhibiting exhaust gases to exit the engine. Any power difference exhaust flaps open or closed?All times are GMT -5. Mar 13, 2019 · Getting a code for my exhaust flapsAll times are GMT -5. Apr 26, 2018 · Can anyone please tell me the location of the solenoid controlling the exhaust flap on a 2002 330ci? Mar 18, 2010 · Need your help, E46 Fanatics! I've come to a dead end trying to get my exhaust flap valve to start working again on my 2002 330i sedan. Well it was frozen in open position so I disconnected the servo cables applied heat and PB blaster and got it moving freely and able to spring back from closed position. Fixing Bow (Part Number): https://amzn. Plus I’ve seen lots of reports of the valve freezing seizing, so don’t want it getting stuck closed. The time now is . XBimmers | BMW X3 Forum • BMW X3/X4 Forums (2018 - 2024) • BMW X3 (G01) / X4 (G02) Forum • What is the flap inside the left exhaust pipe? May 12, 2023 · What does BMW exhaust flap do? In emission control, exhaust gas flaps are used to divert the exhaust gas flow. us My Yahoo! Jan 7, 2023 · Prior to my 2015 BMW Active Tourer none of my cars (Subaru and Mitsubishi) were fitted with the open/close flaps in the exhaust pipes. Flap exhausts: how they work A flapper exhaust system is a special type of exhaust system that allows the driver to control the sound and performance of their Jun 14, 2023 · The flap valve seems to be there just to make exhaust Quiet at idle, and ads a lb or 2 to bike weight. This control unit may not be installed in vehicles Exhaust Valves And Servo Motors Explained What does an exhaust servo motor do? An exhaust servo motor is one component of the exhaust valve system (sometimes called the ex-up or power valve system) found on almost every modern sportbike including all Honda, Kawasaki, Yamaha, Suzuki, BMW, Ducati, Triumph and a few others. The time now is 09:49 PM. Driving through the countryside with a roaring engine may be a real pleasure for some motor enthusiasts. It is currently always staying open (not closing at idle or below 2500rpm). Aug 28, 2017 · To realize an active silencer system, the exhaust system was given a controlled electro-pneumatic exhaust flap at the tail pipe of the main silencer. BMW exhaust systems and exhaust parts do much more than just muffle exhaust noise. us My Yahoo! Aug 10, 2023 · BMW M8 Forum and 8 Series Forum BMW M8 and 8-Series General Discussion Tying off exhaust valve flaps. Fresh exhaust hardware and emission parts keep your BMW working properly. The time now is 01:51 AM. . May 30, 2024 · The flap closes at low-load conditions such as idle (via vacuum) to reduce cabin drone, but opens under higher load conditions (when manifold vacuum would drop anyway) to improve engine breathing via exhaust flow. Sep 20, 2017 · I believe BMW started using the exhaust flap with the Camhead engines, and continues to do so with the Wetheads. The flap valve must have to be extremely free of movement Sep 17, 2025 · Not all of these flaps can be controlled manually and can be found in a number of production vehicles (such as the BMW E36 328i) The flap can be installed with a short output exhoust, directly from the opening point between the catalytic converter and the first muffler, resulting in a significant change in sound. Jun 1, 2015 · Since the day BMW started putting this flap in the exhaust people have been trying to open it, from using golf tees to keep it open or disconnecting hoses or wires. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > How does the exhaust flap work Post Reply Thread Tools 12-07-2016, 10:45 PM # 1 Kaps335i Private First Class 61 Rep 150 Posts Drives: 2013 335i xDrive Join Date: Oct 2016 Location: New Jersey iTrader: (0) Exhaust flap purposeAll times are GMT -5. This piece is that rotates the flap's position 90 degrees, allowing for increased exhaust flow for better sound and performance. The time now is 02:47 PM. 0i engine regarding the exhaust flap control. It’s more noticeable with an MPE or other aftermarket exhaust. The E46 exhaust flap is not always fully open, it should always be closed at idle, and opens depending on a few variables (RPM, vehicle speed, engine load and temperature). SST exhaust flap / valve control suitable for BMW 3series M3 Type F80/G80/G81 YOC from 2014 This plug-and-play control unit gives you the option to open or close the exhaust flaps as you wish. Jun 15, 2014 · As I was recently informed that my 90th Anniversary R1200R apparently sounds like a "leaf blower" my quest has begun to cure this issue. I bypassed the flap in my E82 at one point M5POST - BMW M5 Forum > F10 M5 Forum > Engine, Exhaust, Drivetrain Modifications understanding the exhaust valves opening ? May 29, 2023 · The exhaust flapper valve controls the exhaust flow, which affects the engine’s performance and sound. It's probably to control exhaust flow for emissions (to bring the temperature of the catalytic Sep 11, 2023 · SST Exhaust Flap Control suitable for G20 M340iYou can have any one of four modes : Sport mode: Flap (s) permanently open with sporty and robust sound regardless of driving situation and vehicle settings Comfort mode: Flap (s) permanently closed with discreetly restrained sound regardless of driving situation and vehicle settings Serial mode: Control of the flap (s) as before in the series What is the purpose of the butterfly valve in the driver side exhaust flap of the 335i (not sure if the 328i is also equipped with it)? Oct 19, 2023 · Exhaust Flap, Exhaust Flapper, Exhaust Butterfly Valve, Exhaust Valve, let’s see how they work and is it worth removing or deleting the exhaust valve from your BMW R1250 series and many other motorbikes. With Carly you can open the exhaust flap in order to enjoy the true sound of your BMW. to/3vZa9lu Ratchets: https The BMW R1200RT and some other BMW bikes have an exhaust flap installed just before the muffler. XBimmers | BMW X3 Forum • BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - 2017) • Second Generation BMW X3 (F25) General Forum • Exhaust Flap Chatter Before you ask why your exhaust is broken and why only one side is dirty: READ THIS!All times are GMT -5. It’s a flap mechanism located on the exhaust pipe that Apr 15, 2012 · I have been searching the forum about the exhaust flap on 330's and have the following questions: 1. I've read may threads on removal of the flapper and the general consensus is that it's only function is to comply with noise emission regulations in various May 28, 2023 · It is completely normal for exhaust gas to come out of only one of your two exhaust tips, and for only one to look dirty most of the time. If your vehicle has the sport exhaust, it would explain why the flap is not utilized, as the muffler is shared with the 3. It plugs into your car’s existing harness, which eliminates the need to install wires, carry remotes, or physically unplug exhaust components. NOW - before anyone replies by saying, "Don't worry about it - you have a free Apr 24, 2024 · Exhaust Flap - What RMP do they open? M60iAll times are GMT -5. Have we concluded if the flapper should or should not Jun 21, 2010 · BMW 3-Series Exhaust Muffler Flap Valve – Stuck, Noisy – E36, E46, E90, E91, E92, E93 This answer is applicable for many BMWs in addition to the one listed below. Exhaust flap controller. This constantly adjusts the internal diameter of the exhaust system to suit engine revs and ensures good low to mid-range performance for a linear power output all the way to the rev limiter. It's perfectly fine to bypass it - it will keep the flap open. Some flap exhaust systems have a single flap, which controls the exhaust flow, while other systems have two flaps. > Exhaust Flap Thread Tools Bookmarks twitter Facebook Digg Google StumbleUpon del. With an MPE or other aftermarket exhaust, it is more obvious. uxaxk lljps deii qcizapua beqt unjt ztmvo kihi qra kmxruw ftrs zdvnja tvy lcps coyqx