I am a technician and so when you asked the question "Should the EGR valve be open or closed during DPF regeneration?" and I didn't immediately know I thought huh? How come I've never had to consider that before? Good question. But what I do know about EGRs is they allow spent gases to occupy some of the combustion chamber therefor reducing exhaust temperatures and NOx emissions as a result. What I know about DPF regeneration is the temperatures are extremely high to break down the hydrocarbons clogging the filter. Logically then: The EGR should be closed during a DPF regen. But I imagine there are specific circumstances in the mapping that will allow for it to be open maybe some of the time. Good video again Dan. You're a legend and obviously really know your stuff.
I'm a BMW tech and done to the letter. Not to mention the EGR cooler issues. We also carry out an air mass test via ISTA to confirm repair. Very interested in the Top Don machine have used the Pheonix Elite very impressed .
I'm so glad I found your UA-cam account a few years ago, everything you do seems so easy and professional. I work as an educator in car mechanics and sometimes I make my students watch some of your videos and answer questions, keep doing what you do! Best regards, Jake!
The cars are so well made nowadays,that it's amazing, they inteligently manage to carefully design and make a simple 2 bolt EGR valve that you absolutely need a 1000 euro computer to allow you to tighten those 2 bolts, just amazing
EGR valve should be closed during dpf regeneration, then all heat will come thru dpf to help gain particulars burning temperature. Another great video Dan!
When the egr valve is open, the temperature of the exhaust gas will decrease. With a closed valve it Increases wich is necessary for the regeneration (around 600°c i believe)
Interesting that UA-cam just notified me 4 weeks after you uploaded this video! Not sure what’s up with that! Yep all notifications selected! Thanks for the video Dan.
Thanks man, Interesting those EGR valves. When I bought my iQ in 2010 the EGR was draining from before the catalyst, from the exhaust. These were the then " older" model iQ's (till second half 2010) . After some strong discussion with Toyota Holland they replaced the EGR valve, that now was draining after the catalyst. All the newer models from second half 2010 had it in this way. The older models had some problems due to the placement of the EGR valve. I think owners in England went to court about this. Cars would randomly stop having power and go in limp-mode. After a lot of discussion here in Holland with Toyota, they exchanged the valve and catalyst. For free. It has never been a recall action. Weirdly.
Most enjoyable channel on UA-cam for auto enthusiasts......! Perfectly explained in detail with entertaining commentary. These EGR valves have similar issues with many vehicles including Ford and Toyota. Lots of UA-cam videos on the cleaning process but these repairs seldom last. Thank you for producing the best diagnostic videos of all. Please keep them coming...!
The EGR and the Throttle Body are active during regeneration, (I’m not going to say open or closed as their positions change) the reason for this is to control the level of oxygen entering the combustion chamber which then controls exhaust Temperature during regeneration.
Stays closed on my 2.0 TDI PD BMP. Infact my EGR is programmed off so it stays closed and is blocked off. It still regens and reaches temperatures of 800c. The only time my regen can't initiate is when there is an EGR code stored on the computer.
You've been watching the Hydraulic Press Channel Dan. And the EGR valve should be closed during regen. Thank you for another entertaining and informative vid!
Dan , you are 100 percent right in your diagnosis , and fitting of this part , i am a BMW tech of 30 years , as you know BMW are on a masive EGR cooler recall , the last few EGR recalls have being change the Valves and program the car , then was change just the EGR coolers , now it change EGR coolers with valves as well , i suspect the cat will be due for that recall .
With an EGR on I got DPF regenerations each 250km. With EGR Off i have a regeneration each 900km. In a normale case when regeneration is active the EGR is close. An open EGR make a lower inside burning temperature. For a good DPF regeneration the DPF needs a high temperature. Thanks for the video, Dan. To check regenarations I have connected a warning licht to the rear window heating connection. So I have allways a completed regeneration. If lamp is on i drive till the lamp is off. Takes +/- 10 minutes.
During the DPF regeneration cycle, some diesel gets sprayed by the injectors on the exhaust stroke, to help burn off the soot caught in the DPF. EGR valve would need to be closed. Always love your videos man! Greetings from South Africa!
I've had this problem on the street sweepers in our fleet. Lots of low load operation means that soot builds rapidly. However the egr valve is over 500 dollars and the labour to clean is only $180. So we are clean them out.
Je video's zijn een genot, ik vind je Engels goed. Had het pas door toen ik die gele kentekenplaten in je garage zag. Echt top, dank je wel voor de kennis, maak er best wel gebruik van bij mijn werk in de garage.(vakgarage in Diemen). Translation: only compliments
After looking at this video a second time, I start to understand what's happening. One thing which isn't mentioned is that when the valve is stucked, the engine die after some seconds, and in the meantime it run very rough. When you try to start several times, may be the engine keep on running. In my car, X3/F25 30d 2011, it got stuck this week (fault code P042E). Long story short. There is a plastic cover above the gears compartment, by removing that I could see that the axle/valve was stuck in open position. This time I could move it up and down by the hand. I put som grease on the moving parts, and I will drive a little to see what happens next then I put the cover back. There was no soot at all among the gears! The car has been driven 246,399 km, but it is "new" for me. The adventure goes on... 🥺😉
Let me just say that Harbor Freight sells a set of security bits, and the one they sell for cheap has a whole set of torque bits in it. I recently used a T40 to remove a bolt from a throttle body on a 96 Cadillac DeVille. It didn't need the security hole in the middle for it but it was the only T40 I had. You never know when you'll need a bit that needs a hole in the middle to work on something. You don't see them often but you don't need one until you need one!
hi Dan, in answer to your question, to regen the DPF , it need to be heated about 600 degrees, and it would be done by injecting fuel ATDC ,it's like to make stroke in the DPF,so the EGR should be closed , to not cooling down Exhust temperature.
Great demonstration of what will happen if you draw the egr in with the bolts without actuating it first. Loving the Topdon stuff glad to see it was capable of this job. oh and closed
Hi Dan: Great Video. Yes!! Always read the instructions. Never "ASSUME!!" it does make an A-- out of you and me!" Always read the manual/instructions. Very good information!!
Excellent! Do you think this is the reason that a special key is required? To ensure that the engineer is alerted that there is something special in the assembly procedure? I see no other reason for the manufacturer not to use regular bolts.
Excellent point. I was cussing the manufacturer when I initially saw those security bolts thinking to myself, 'why, just why?' Your observation probably explains the very reason.
I'm amazed with the details of your work giving excellent visuals to really make sure we understand. I wonder what the graphing multimeter would have shown.
During the DPF regeneration process diesel fuel is injected into the cylinder after combustion has taken place on the exhaust stroke (post injection) so it is pushed through the open exhaust valve into the exhaust system. Here it is burned with air to generate the heat required to burn the carbon (soot) in the DPF, so the EGR would be closed to increase the temperature. Keep it up Dan, great videos! Even a school boy would understand what you're talking about...:)
I've been through the same exact thing but the scan tools I had did not have the feature to put the EGR into the fitting position, I had to work out which wires were for the actuator and simply supplied them with 12V while I fitted it, and fitted it quick because who knows what duty cycle the EGR actuator is designed for, but it worked, the only other thing you didn't say, and this could be my memory here as it was a while back is that I recall using a diag tool to tell the ECU it had a new EGR valve fitted, which is common these days.
Great video, the install tip and the question. I would think the valve needed to be closed during regeneration so maximum heat can burn the particulates in the filter.
Dpf regen happens by injecting more fuel post (after tdc). This will make exhaust heat. Egr is allways closed under regen to get maximum o2 in to combustion. A leaking egr valve will make combustion colder and less clean, making life for dpf hard..
It's good to see you with another video after all this time but never the less it is another good one , answer to your question is the EGR valve should be closed because all the heat is needed for regeneration to take place.
definitely right to replace it if you want to warranty it, but I would definitely go get some Berryman carb cleaner or some Rust Blaster and spray it down and clean it. I might even take something like that and put it in some Organic Apple Cider Vinegar with the mother in it and submerge it in a small glass bowl and let it soak for an hour or so. I've done that on a lawn mower gas tank before that had a lot of build up from dirty low octane gas and it had the screen in the bottom of the gas tank shiny again. Even adding some baking soda to it will activate a cleaning foam with the vinegar that is actually great to use in bathtub and sink drains!
Maybe, if you didn't have a scan tool that offered that feature, maybe you could retract the plunger with the tool you used to test it with? Even if you retracted all the way, it would seem you would have adequate clearance for mounting.
My petrol Skoda Octavia EGR valve was sticking/jamming last year and my local garage took the top off to reveal the same problem ... Soot & Carbon. After a vacuum, scrape-out and lubrication everything was fine .... but only for 3 month. Than I broke down at a particularly bad junction, and had to be recovered with my Dog in the car .... EGR was the fault code. A new EGR valve installation was £303 in rip-off UK ...
Hi am peter , long time, the EGR is actually active during DPF regeneration because once the RPMS increase the exhaust gases have to be recycled ,so with its duty cycle it opens and closes as the dpf is regenerated. thnx allot
Hi Dan a potential cause for the parasitic draw could actually be the egr too As its commanded shut after engine is off then it will often try to satisfy the position sensor by trying to release the egr, this is the reason you sometimes hear a loud buzzing from the failed egrs with electronic actuators. Its not something I've proved like but I know the egrs are required shut during start up to allow the maf and intake calculations to be accurate without unmetered egr flow. The current draw could be similar to when a starter goes duff. You still send the same power that's required.... but it does nothing and if the computer is trying to close a stuck open valve by commanding the motor to give the spring a little push for a while after cars of it could create a draw. Just a thought. Hope your well. Haha get top Don to send me freebies and ill love them long time hahaha
I love these videos and your diagnosis are alaways great but you surprised me that you made a mistake in that you never checked to see if the egr cooler was blocked or leaking coolant as this is a very common problem on these bmw/mini engines there is even a quilty enhancement for that issue at the moment
@@Diagnosedanhi Dan love your videos but didn't say it was blocked I said you should have checked it while you had the valve out and yes they can start blocking up and sooting up the egr valve that was your fault sticking egr return spring valve ya ? When the soot builds up after a period of time they over heat the egr cooler then crack and leak coolant I see it every day unfortunately anyway keep the videos rolling 👍
heheee, dat was lang wachten. weer gemaakt.. zal die blij mee zijn goed bezig DAN.. de oude is nog wel werkbaar /werkend te maken, maar door het de levens tijd, niet meer aan te raden. overal speling op en zit je weer binnen geringe tijd weer met het zelfde euvel. prima gewoon nieuw steken. juiste beslissing !
Wow... I'm really glad I'm subscribed to ur channel.. I work in an automotive training center and I've been looking for a scan tool which I can connect to a big screen for ease of demonstration with my students... Thanks for ur great work Mr Dan
Great vid again, and the shop looks cooler than ever👍 That's quite interesting, didn't know the EGR valve had a service mode on BMW? Have an old Mercedes (220cdi/W211) i like to screw around with. And i can tell you that the EGR valve takes two minutes to remove with a T30 and E10 bit. No cooling lines to clamp off. And it is a "caged" type so the valve isn't just hanging out in the open like that. And to answer your question, EGR is closed during DPF regen. as many of the comments is claiming. But not completely, i'm guessing the EGR position sensor is around ~2,5%.
The EGR on my 84 Lincoln Mark VII would get stuck open and I would have chunks of carbon holding the valve open . When stuck open the car would not idle. Never figured out what caused the carbon. I think it was related to slack in the timing chain , causing the vehicle to run rich. The work around was a screen that caught the carbon .
I had this on my 2011 520D , new EGR sorted it, FYI there is a couple of EGR cooler recalls of the BMW B47 engine [ my Current one] , cooling fluid leaking from the EGR cooler onto a hot exhaust manifold can cause a fire.
Well done Dan. It's understandable why you decided to change that egr valve for brand new, you own the shop and by trying to clean that valve and possible problems down the road equals doing same job twice hence losing time and money, probably having unsatisfied customer. On the other side that valve looks pretty simple, if that was my car I would try to soak that valve in some kind of solution that dissolve carbon deposits, little bit of compressed air and some kind of fine brush.. To answer your question - should valve be open or not during dpf regeneration - I think it should be closed because regeneration needs higher exhaust gasses temp and recirculation is doing opposite thing by bringing O2 down in combustion cycle, narrowing conditions for harmful NOX gasses to be produced.
@@Diagnosedan The problem is that the black soot doesn't cause issues (soot is actually a lubricant). It's other, harder deposits such as oil ash that form a hard high-friction layer which lead to sticking valves. And that layer is virtually impossible to clean off. We've had many issues with sticking VTG systems due to such deposits forming between the center section and the variable guide vanes. Especially after regeneration, when there was no soot inside the VTG, they tended to start sticking. In the end the supplier of the VGT had to modify the tolerances and the material spec of the vane actuator shaft to fix this issue.
An open valve helps lower the exhaust gas temperature and reduce NOx. It needs to be closed to allow the exhaust temperature to increase sufficiently for regeneration. @diagnosedan these videos are 👌
Great work Dan, Love all the bonus footage as well 🤣 :) An EGR valve installation position, does it also need a relearn after install? The extra lengths to stop people working on their vehicle I guess it could be possible to retract by applying voltage during install if the shop had no feature on their scan tools, similar to electronic brake caliper and using the electronic brake switch/button for adaption afterwards. Always good to see your videos, I hope ya get time to post up more often😃
Hello Dan. Glad to find your video. Can you advise for BMW 320D with Fault code 290900 air to EGR air mass flow, plausibility measured air mass compared with calculated air mass to high, please
Appreciate your content!! I wanted to note I’m experiencing a misfire on cylinder 8 (bmw X5 2008 4.8 utility) I changed coils plugs airflow sensor. I have not yet touched injectors. Any advice would be grateful thank you
Excellent video Dan! I've have this exact issue with my 520d, BMW replaced the valve and cooler and updated the software, issue resolved for a couple of months, then new EGR got clogged/stuck again, replaced again, I now have the same symptoms again with the 2nd new valve. Any suggestions why it is still happening? They mentioned the software update controls the valve differently now depending on the temperature 🤔
Diagnose Dan fan boy here 😂 ( Hi to the guys from CCM over in the UK that are forced to watch your videos by my brother (their boss)) Another Great video Dan...
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I am a technician and so when you asked the question "Should the EGR valve be open or closed during DPF regeneration?" and I didn't immediately know I thought huh? How come I've never had to consider that before? Good question.
But what I do know about EGRs is they allow spent gases to occupy some of the combustion chamber therefor reducing exhaust temperatures and NOx emissions as a result.
What I know about DPF regeneration is the temperatures are extremely high to break down the hydrocarbons clogging the filter.
Logically then: The EGR should be closed during a DPF regen. But I imagine there are specific circumstances in the mapping that will allow for it to be open maybe some of the time.
Good video again Dan. You're a legend and obviously really know your stuff.
You are armed with the knowledge and the right tools and you know how to use them! You would make a great weatherman I am sure.
🤣🤣Thanks!
I'm a BMW tech and done to the letter. Not to mention the EGR cooler issues. We also carry out an air mass test via ISTA to confirm repair. Very interested in the Top Don machine have used the Pheonix Elite very impressed .
I'm so glad I found your UA-cam account a few years ago, everything you do seems so easy and professional. I work as an educator in car mechanics and sometimes I make my students watch some of your videos and answer questions, keep doing what you do! Best regards, Jake!
The cars are so well made nowadays,that it's amazing,
they inteligently manage to carefully design and make a simple 2 bolt EGR valve that you absolutely need a 1000 euro computer to allow you to tighten those 2 bolts,
just amazing
You can make this procedure with 10$ ENet cable and dealer Software. Bmw diagnostic Software is very-very good.
bmw so over engineered it is sublimely stupendous SIMPLE ENGINEERING EQUALS CLEVER ENGINEERING ALWAYS.
The best and most interesting technician on youtube , need more big dan , 1 video a day should keep everyone happy.. thankyou sir..
Thanks for the great comment!
EGR valve should be closed during dpf regeneration, then all heat will come thru dpf to help gain particulars burning temperature. Another great video Dan!
Yes am with u with the answer
Thanks for the comment 😉
When the egr valve is open, the temperature of the exhaust gas will decrease. With a closed valve it Increases wich is necessary for the regeneration (around 600°c i believe)
Thanks for watching!
Exacta!
Interesting that UA-cam just notified me 4 weeks after you uploaded this video! Not sure what’s up with that! Yep all notifications selected! Thanks for the video Dan.
Something new you learn every day. I wonder how many people have been fitting them wrong all this time. 👍👍👍👍👍
I was thinking the same🤣
Love the bloopers, I have been putting them in my videos for several months now with positive results. They want to see that we are not perfect.
Thanks for watching!
Thanks man, Interesting those EGR valves.
When I bought my iQ in 2010 the EGR was draining from before the catalyst, from the exhaust. These were the then " older" model iQ's (till second half 2010) . After some strong discussion with Toyota Holland they replaced the EGR valve, that now was draining after the catalyst. All the newer models from second half 2010 had it in this way.
The older models had some problems due to the placement of the EGR valve. I think owners in England went to court about this. Cars would randomly stop having power and go in limp-mode.
After a lot of discussion here in Holland with Toyota, they exchanged the valve and catalyst. For free.
It has never been a recall action. Weirdly.
I like how you explain everything. Unlike other channels like this where i get bored, this is quite enterntaining and informative.
Most enjoyable channel on UA-cam for auto enthusiasts......! Perfectly explained in detail with entertaining commentary.
These EGR valves have similar issues with many vehicles including Ford and Toyota. Lots of UA-cam videos on the cleaning process but these repairs seldom last. Thank you for producing the best diagnostic videos of all. Please keep them coming...!
Thanks for taking the time to leave a comment!
I like Dan. Why. Because he don't waste time to talk a lot. Straight into troubleshooting. Thank You so much
Thanks for the comment
The EGR and the Throttle Body are active during regeneration, (I’m not going to say open or closed as their positions change) the reason for this is to control the level of oxygen entering the combustion chamber which then controls exhaust Temperature during regeneration.
👍🏽
Thanks for watching my video!
EGR stays closed on my 3.0 TDI.
@@FoookOff intentionally?
Stays closed on my 2.0 TDI PD BMP. Infact my EGR is programmed off so it stays closed and is blocked off. It still regens and reaches temperatures of 800c. The only time my regen can't initiate is when there is an EGR code stored on the computer.
There are regular car technicians, and the there is Dan. 👍👍👍
I was going to give grief over the security-torx, but the potential damage from improper installation makes sense.
You've been watching the Hydraulic Press Channel Dan. And the EGR valve should be closed during regen. Thank you for another entertaining and informative vid!
I was about to comment about the Hydraulic Press Channel too !
Yes indeed i've watched some of the videos 🤣🤣
Dan , you are 100 percent right in your diagnosis , and fitting of this part , i am a BMW tech of 30 years , as you know BMW are on a masive EGR cooler recall , the last few EGR recalls have being change the Valves and program the car , then was change just the EGR coolers , now it change EGR coolers with valves as well , i suspect the cat will be due for that recall .
Thanks for the comment 👍
Thanks!
Hello
Thank you very much!
With an EGR on I got DPF regenerations each 250km. With EGR Off i have a regeneration each 900km. In a normale case when regeneration is active the EGR is close. An open EGR make a lower inside burning temperature. For a good DPF regeneration the DPF needs a high temperature. Thanks for the video, Dan. To check regenarations I have connected a warning licht to the rear window heating connection. So I have allways a completed regeneration. If lamp is on i drive till the lamp is off. Takes +/- 10 minutes.
Thanks for watching Geri
You have the coolest tools. I would be lying if I told you I wasn't jealous
should be closed during dpf regeneration , Thanks for all the lessons you provide us all ✌
During the DPF regeneration cycle, some diesel gets sprayed by the injectors on the exhaust stroke, to help burn off the soot caught in the DPF. EGR valve would need to be closed. Always love your videos man! Greetings from South Africa!
How interesting you have a large monitor to see the scanner info. I just suggested this to Eric O. at South Main Auto the other day.
My eyesight is getting worse 🤣
I've had this problem on the street sweepers in our fleet. Lots of low load operation means that soot builds rapidly. However the egr valve is over 500 dollars and the labour to clean is only $180. So we are clean them out.
Makes sense if the egr valve is that expensive
Thanks for another great video Dan, just wish you had time to make more as they are really enjoyable to watch.
Yes it would be great to do more videos
love it when istructions says refer to service manual by the car manufacturer!
I just changed out the Egr valve on my small block Chevy. Took me less time than than the Blooper reel! Lol! Thanks Dan, You are the Man!
Thanks for watching John
Well it’s not a BMW, it’s a crap Chevy
Another AWESOME video Dan ! Thanks for all the lessons you provide us all !!
Much appreciated !
Thanks!
Thanks Dan! Always learn something new when watching your videos!!
Thanks for taking the time to leave a comment Mike!
Je video's zijn een genot, ik vind je Engels goed. Had het pas door toen ik die gele kentekenplaten in je garage zag. Echt top, dank je wel voor de kennis, maak er best wel gebruik van bij mijn werk in de garage.(vakgarage in Diemen).
Translation: only compliments
After looking at this video a second time, I start to understand what's happening. One thing which isn't mentioned is that when the valve is stucked, the engine die after some seconds, and in the meantime it run very rough. When you try to start several times, may be the engine keep on running.
In my car, X3/F25 30d 2011, it got stuck this week (fault code P042E).
Long story short.
There is a plastic cover above the gears compartment, by removing that I could see that the axle/valve was stuck in open position. This time I could move it up and down by the hand. I put som grease on the moving parts, and I will drive a little to see what happens next then I put the cover back.
There was no soot at all among the gears! The car has been driven 246,399 km, but it is "new" for me.
The adventure goes on... 🥺😉
Let me just say that Harbor Freight sells a set of security bits, and the one they sell for cheap has a whole set of torque bits in it. I recently used a T40 to remove a bolt from a throttle body on a 96 Cadillac DeVille. It didn't need the security hole in the middle for it but it was the only T40 I had. You never know when you'll need a bit that needs a hole in the middle to work on something. You don't see them often but you don't need one until you need one!
watching from Scottsdale, Arizona, USA... good videos
hi Dan, in answer to your question, to regen the DPF , it need to be heated about 600 degrees, and it would be done by injecting fuel ATDC ,it's like to make stroke in the DPF,so the EGR should be closed , to not cooling down Exhust temperature.
I can watch your videos for hours, and learn a lot from you, thank you Dan 💐
Great demonstration of what will happen if you draw the egr in with the bolts without actuating it first. Loving the Topdon stuff glad to see it was capable of this job. oh and closed
Thanks for watching Scott
Dan, i would be interested to see a car diagnosis and repair on a DPF blocked or not regenerating and an explanation of the system, great video thanks
I love how you refurbished the old valve at the end.
🤣🤣
Hi Dan:
Great Video. Yes!! Always read the instructions. Never "ASSUME!!" it does make an A-- out of you and me!" Always read the manual/instructions. Very good information!!
That's great John
Excellent! Do you think this is the reason that a special key is required? To ensure that the engineer is alerted that there is something special in the assembly procedure? I see no other reason for the manufacturer not to use regular bolts.
Excellent point. I was cussing the manufacturer when I initially saw those security bolts thinking to myself, 'why, just why?' Your observation probably explains the very reason.
Yes that's the reason!
Great video Dan. The EGR valve should be closed during DPF regeneration
Thanks for watching
Dan!!!! Where have you been??? We have been jonesin for more video from you here in the states. I personally love all your videos.
I've been very busy! Thanks for the great comment
I'm amazed with the details of your work giving excellent visuals to really make sure we understand. I wonder what the graphing multimeter would have shown.
The leopard has nothing on the Bob Semple tank. lol. That's a snazy PWM machine you have there.Thanks for sharing Dan.
My pleasure
During the DPF regeneration process diesel fuel is injected into the cylinder after combustion has taken place on the exhaust stroke (post injection) so it is pushed through the open exhaust valve into the exhaust system. Here it is burned with air to generate the heat required to burn the carbon (soot) in the DPF, so the EGR would be closed to increase the temperature.
Keep it up Dan, great videos!
Even a school boy would understand what you're talking about...:)
Thanks for the comment 👍
I've been through the same exact thing but the scan tools I had did not have the feature to put the EGR into the fitting position, I had to work out which wires were for the actuator and simply supplied them with 12V while I fitted it, and fitted it quick because who knows what duty cycle the EGR actuator is designed for, but it worked, the only other thing you didn't say, and this could be my memory here as it was a while back is that I recall using a diag tool to tell the ECU it had a new EGR valve fitted, which is common these days.
Great video, the install tip and the question. I would think the valve needed to be closed during regeneration so maximum heat can burn the particulates in the filter.
Thanks for watching Mike
Dpf regen happens by injecting more fuel post (after tdc). This will make exhaust heat. Egr is allways closed under regen to get maximum o2 in to combustion. A leaking egr valve will make combustion colder and less clean, making life for dpf hard..
best channel ever !! big love from tunisia
Great video Dan, best diagnosis channel on UA-cam.
Thank you!!!!!!!
nice one, good explanation of egr/pwm supply. like your pipe clamps tho
That pressure test on the old EGR valve did a great job of cleaning out the "junk"😜
Great videos Dan, can you show where the oil pressure sensor is on BMW 520 diesel 2014?
A fantastic video, but which of the 6 pins have you put the positive and negative ones to activate the valve.
I really appreciate when UA-cam send me a notification about a new vídeo that chanel. Thank you a lot Dan.
My pleasure, thanks for watching
Very informative and on point.
Also liked the bloopers 🤣
It's good to see you with another video after all this time but never the less it is another good one , answer to your question is the EGR valve should be closed because all the heat is needed for regeneration to take place.
Thanks for your comment
Thanks for the video, I wish there were more releases. The EGR valve must be closed during regeneration.
Doing my best😉
definitely right to replace it if you want to warranty it, but I would definitely go get some Berryman carb cleaner or some Rust Blaster and spray it down and clean it. I might even take something like that and put it in some Organic Apple Cider Vinegar with the mother in it and submerge it in a small glass bowl and let it soak for an hour or so. I've done that on a lawn mower gas tank before that had a lot of build up from dirty low octane gas and it had the screen in the bottom of the gas tank shiny again. Even adding some baking soda to it will activate a cleaning foam with the vinegar that is actually great to use in bathtub and sink drains!
Your videos are really enjoyable! BR from Estonia!
Maybe, if you didn't have a scan tool that offered that feature, maybe you could retract the plunger with the tool you used to test it with? Even if you retracted all the way, it would seem you would have adequate clearance for mounting.
We don't need paper directions when we have you Dan to tell us to read the directions. lol Excellent info!
And we don't need a workshop manual on a Corvette when we have Glen💪💪😁
Great video again Dan, you will have to do more videos, Dan your the man!!
Thanks for watching
My hero! wonderful demos and explanations❤
lol you do look like a weatherman with that big screen up reading the fault codes! That is kind of funny!
My petrol Skoda Octavia EGR valve was sticking/jamming last year and my local garage took the top off to reveal the same problem ... Soot & Carbon.
After a vacuum, scrape-out and lubrication everything was fine .... but only for 3 month.
Than I broke down at a particularly bad junction, and had to be recovered with my Dog in the car .... EGR was the fault code.
A new EGR valve installation was £303 in rip-off UK ...
EGR should be kept closed during the installation, I like the why u diagnose these things u make it look simple.
Thanks!
I have that exact bmw, 2017 x1? I have had problems with the exhaust flap not opening and now they are replacing my entire exhaust
Rheinmatall bought Pierburg (carburater) many years ago and still develop car parts related to fuel supply, injection etc
Hi am peter , long time, the EGR is actually active during DPF regeneration because once the RPMS increase the exhaust gases have to be recycled ,so with its duty cycle it opens and closes as the dpf is regenerated. thnx allot
Thanks for watching
Hi Dan a potential cause for the parasitic draw could actually be the egr too As its commanded shut after engine is off then it will often try to satisfy the position sensor by trying to release the egr, this is the reason you sometimes hear a loud buzzing from the failed egrs with electronic actuators. Its not something I've proved like but I know the egrs are required shut during start up to allow the maf and intake calculations to be accurate without unmetered egr flow. The current draw could be similar to when a starter goes duff. You still send the same power that's required.... but it does nothing and if the computer is trying to close a stuck open valve by commanding the motor to give the spring a little push for a while after cars of it could create a draw. Just a thought. Hope your well. Haha get top Don to send me freebies and ill love them long time hahaha
Thanks for the feedback
I love these videos and your diagnosis are alaways great but you surprised me that you made a mistake in that you never checked to see if the egr cooler was blocked or leaking coolant as this is a very common problem on these bmw/mini engines there is even a quilty enhancement for that issue at the moment
If the egr cooler is blocked i wouldn't have the faultcode egr flow to high. The car is not loosing any coolant and everything was dry inside
@@Diagnosedanhi Dan love your videos but didn't say it was blocked I said you should have checked it while you had the valve out and yes they can start blocking up and sooting up the egr valve that was your fault sticking egr return spring valve ya ? When the soot builds up after a period of time they over heat the egr cooler then crack and leak coolant I see it every day unfortunately anyway keep the videos rolling 👍
Finally, another Diagnose Dan video!
😁👍
heheee, dat was lang wachten.
weer gemaakt.. zal die blij mee zijn goed bezig DAN..
de oude is nog wel werkbaar /werkend te maken, maar door het de levens tijd, niet meer aan te raden.
overal speling op en zit je weer binnen geringe tijd weer met het zelfde euvel.
prima gewoon nieuw steken. juiste beslissing !
Bedankt voor het kijken!
Wow... I'm really glad I'm subscribed to ur channel.. I work in an automotive training center and I've been looking for a scan tool which I can connect to a big screen for ease of demonstration with my students... Thanks for ur great work Mr Dan
The Topdon Phoenix Max has a mini Hdmi connection that makes it easy to share the screen
I always get a kick out of the bloopers. My brain and face don't work well together like that either.
🤣🤣👍
That's a cool one Dan,Best option was to replace,otherwise,eventually,the carbon soot would have found its way back to the drivers
Thank you for your video. Please tell me if the egr valve has an error, will it affect engine power?
Great vid again, and the shop looks cooler than ever👍 That's quite interesting, didn't know the EGR valve had a service mode on BMW? Have an old Mercedes (220cdi/W211) i like to screw around with. And i can tell you that the EGR valve takes two minutes to remove with a T30 and E10 bit. No cooling lines to clamp off. And it is a "caged" type so the valve isn't just hanging out in the open like that. And to answer your question, EGR is closed during DPF regen. as many of the comments is claiming. But not completely, i'm guessing the EGR position sensor is around ~2,5%.
Thanks for the great comment 👍😁
The EGR on my 84 Lincoln Mark VII would get stuck open and I would have chunks of carbon holding the valve open . When stuck open the car would not idle. Never figured out what caused the carbon. I think it was related to slack in the timing chain , causing the vehicle to run rich. The work around was a screen that caught the carbon .
I had this on my 2011 520D , new EGR sorted it, FYI there is a couple of EGR cooler recalls of the BMW B47 engine [ my Current one] , cooling fluid leaking from the EGR cooler onto a hot exhaust manifold can cause a fire.
You are right👍
Great video, Danny!
Thanks for another great video Dan! Your bloopers are funny too - it is what happens when you are proficient in more than one language. It's not easy!
That's right😁
Well done Dan. It's understandable why you decided to change that egr valve for brand new, you own the shop and by trying to clean that valve and possible problems down the road equals doing same job twice hence losing time and money, probably having unsatisfied customer.
On the other side that valve looks pretty simple, if that was my car I would try to soak that valve in some kind of solution that dissolve carbon deposits, little bit of compressed air and some kind of fine brush..
To answer your question - should valve be open or not during dpf regeneration - I think it should be closed because regeneration needs higher exhaust gasses temp and recirculation is doing opposite thing by bringing O2 down in combustion cycle, narrowing conditions for harmful NOX gasses to be produced.
Like i say in the video, if its your own car you are working on you can try to clean it 100%.
@@Diagnosedan The problem is that the black soot doesn't cause issues (soot is actually a lubricant). It's other, harder deposits such as oil ash that form a hard high-friction layer which lead to sticking valves. And that layer is virtually impossible to clean off. We've had many issues with sticking VTG systems due to such deposits forming between the center section and the variable guide vanes. Especially after regeneration, when there was no soot inside the VTG, they tended to start sticking. In the end the supplier of the VGT had to modify the tolerances and the material spec of the vane actuator shaft to fix this issue.
An open valve helps lower the exhaust gas temperature and reduce NOx.
It needs to be closed to allow the exhaust temperature to increase sufficiently for regeneration.
@diagnosedan these videos are 👌
Thanks for the great comment 👍
Dan, I've been sitting around waiting for you to ask for help.
Next time Garth 😉
Excellent work again Dan 👍👍😜
LOVE IT!!! Classic bloopers and an excellent fix, always a pleasure to watch Dan. cheers NZ
Thanks Dave
Great work Dan, Love all the bonus footage as well 🤣 :)
An EGR valve installation position, does it also need a relearn after install?
The extra lengths to stop people working on their vehicle I guess it could be possible to retract by applying voltage during install if the shop had no feature on their scan tools, similar to electronic brake caliper and using the electronic brake switch/button for adaption afterwards.
Always good to see your videos, I hope ya get time to post up more often😃
Hi Dan, im always happy to watch your videos.
Exellent as always.
Thank you!!!
Hello Dan. Glad to find your video. Can you advise for BMW 320D with Fault code 290900 air to EGR air mass flow, plausibility measured air mass compared with calculated air mass to high, please
Appreciate your content!! I wanted to note I’m experiencing a misfire on cylinder 8 (bmw X5 2008 4.8 utility) I changed coils plugs airflow sensor. I have not yet touched injectors. Any advice would be grateful thank you
Excellent video Dan!
I've have this exact issue with my 520d, BMW replaced the valve and cooler and updated the software, issue resolved for a couple of months, then new EGR got clogged/stuck again, replaced again, I now have the same symptoms again with the 2nd new valve. Any suggestions why it is still happening? They mentioned the software update controls the valve differently now depending on the temperature 🤔
Diagnose Dan fan boy here 😂 ( Hi to the guys from CCM over in the UK that are forced to watch your videos by my brother (their boss)) Another Great video Dan...
That's awsome! Thank you very much Dean! Its really appreciated
Nice fix Dan, very interesting install.
Thanks!
Egr valve is commanded closed during a regen. Along with the turbo To increase the load on the engine
Fantastic, cheered me up after a crap day, cheers Dan mate.
That's great to hear i hope tomorrow is a better day Mark😃