BMW N55 Valvetronic Eccentric Shaft, Valvetronic Motor and DME Replacement (Crank No Start)

[@BmwFinatik]

Out of all the videos for valvetonic/servo motor on E 70 with the N 55 I would say this is top three and you replaced the eccentric/intermediate shaft, bearings and all seals great video brother

[@Jbpgarage]

Thanks appreciate you!

[@ytpro9405]

Hi mate. From Australia. You’ve done an excellent video my friend. Well done. May god bless your family. Excellent

[@hishams89]

Hi man many many thanks for sharing the knowledge. 1-Why did u replace the stopping bolt? 2- what is the torque of the 2 bolts holding the caps? Thank you v much

[@voltomike]

Great job! I need to do mine too on a f25 X3 35i. You gave me a lot of confidence to do it.

[@hishams89]

Did you also replace the stopping bolt?

[@Jbpgarage]

Yeah.

[@hishams89]

@@Jbpgarage but why? It sees no wear or tear

[@Jbpgarage]

When I was ordering my parts it was recommended to be replace, so I got it.

[@scottcrawford4148]

Nice video recording. Good luck with your family!

[@able_was_i]

Dang, got me wanting to swap an LS in now after watching this video. 3k is ridiculous. But, great video and craftsmanship my friend

[@dazeboy79]

Hi thanks for sharing! I have e90 and I'm getting 2a3f dme valvetronic actuator power supply & 2A38 valvetronic monitoring sluggish movement. I just tryin to decide if i can just do the needle bearings or if i need a new eccentric shaft.. already got DME fixed, but scared to burn up pin again if ecc shaft doesn't move enough. Was ISTA free?? Suggestions welcome. Can't find much info on E90 eccentric shaft, it is a little different, but also the same. Thanks

[@Jbpgarage]

If you have a N54 or N55 it’s about the same, my bearings wasn’t that bad. I might be able to get away with replacing just the motor. You should remove the valve cover and check visually the condition of the cams and shaft. Also depends on your mileage.

[@robinkim7711]

Did you check the compression when those parts were failed? Just wondering if eccentric shaft / valvetronic can affect no compression problem.

[@Jbpgarage]

No I didn’t

[@robinkim7711]

I have similar situation. N55 Crank bur won't start.. it turns out no compression on all 6cylinders.. just wondering if eccentric shaft/valvetronic contribute those failures... I'm guessing either valvetronic/eccentric failure or jumped timing.....what's your thoughts? Thank you for reply me back

[@Jbpgarage]

@@robinkim7711 I DONT think it should affect the bottom end, are you sure 0 compression on all cylinders?

[@robinkim7711]

@Jbonly21 yes I checked them... it's not totally 0 but it's super low.. all 6.. I did borescoped wall, valves looks fine to me...have you seen&heard like this issue?

[@Jbpgarage]

What codes do you have and what are you using to check it?

[@macannnas]

How did you know or make the decision that your dme was fried or faulty? I have same issues mine stars fine then after 15 seconds starts to miss firing.... Checked plugs.. Coils.. All fine... Change shaft motor still does the ratcheting noise when getting close to the car.. Thank you and great job..

[@Jbpgarage]

Thanks, I had to test all of my modules in the starter circuit, in the end I found out I had power coming in to the DME, but no power from the DME to the shaft motor. Bmw drop the ball by not putting protection between the DME and the shaft motor, so if the shaft motor goes bad, it back feed directly back to the DME.

[@but_why547]

What did you torque the baring caps to?

[@Jbpgarage]

8.5 nm

[@Aromatize]

Fantastic video very thorough. You're right this vehicle has been a pain in my ass. Lol. German engineering? No thanks. I will never go down this road again with BMW.

[@marcoavila8114]

Awesome content! Keep those videos coming

[@tonymisiano4133]

Hey bonjour, Comment tu as compris que le Dme ne fonctionnait plus ???? Merci beaucoup de France 🇫🇷

[@Jbpgarage]

Bonjour, no, the Valvetronic motor went bad and shot the DME.

[@tonymisiano4133]

@@Jbpgarage ok mais comment savoir si le dme est endommagée ?? merci

[@Jbpgarage]

@@tonymisiano4133 first you have to check the connector at the Valvetronic motor and make sure you are getting power, if you are not, check the wire harness and make sure it’s good, if it’s good, then there’s two squares plugs on the DME, one supplier power in from the batteries through the integrated supply module located in the engine bay. If you are getting power going in to the DME and no power coming out, then your DME is bad.

[@tonymisiano4133]

@@Jbpgarage ok merci beaucoup mec 😎

[@juniorwilkinson8968]

Great job my man

[@legoman911]

Great work, why did you need to also replace the eccentric shaft ?

[@Jbpgarage]

No start, my Valvetronic motor was bad, based on the research I did, it’s recommended to replace the shaft as well. With a job that big there’s no way to know what parts you really need with out tearing it down and doing an inspection. I am not a fan of taking a car apart and then waiting on parts. So I just bought everything that was recommended.

[@legoman911]

@@Jbpgarage fair enough, I work with the same mentality.

[@stirfriedpanda5278]

Just a little info from my experience. If you here the clicking when you unlock your car, you will need to change the shaft. That sound is the motor trying to rotate the shaft but running into resistance. This may be because of the needle bearings, or the gears that interact with the motors gears.

[@abiniz]

not sure if it is just me but I actually got away with just replacing the servomotor and the problem went away.

[@Jbpgarage]

@abiniz lucky, did you have a no start issue as well?

[@abiniz]

@@Jbpgarage no i don't think so. but I did have a no start issue with a n20 servomotor

[@rolandknutson3931]

Do you need to leave it at maximum lift when you put it back together?

[@Jbpgarage]

When you install the shaft, not really. You need to have it in a position where it has no tension. You can rotate it after its installed.

[@rolandknutson3931]

@@Jbpgarage will the car start if you leave it at minimum after install

[@Jbpgarage]

It all depends on if you installed the motor properly. Because after you put it back together just with the key on you will hear it self learning and the car should start.

[@ikome20022000]

Thanks very much for this information. Please I would also like to ask, so if the motor can relearn itself after installation and the key is turned on, do we still need to calibrate the Valvetronic motor again or provided the engine is running, everything should be Ok ? thanks for your feedback in advance@@Jbpgarage

[@Jbpgarage]

@@ikome20022000 if you already replaced the motor and the engine is running, you should be fine.

[@urielcruz1334]

Hey bro how do I get ista for my PC

[@danielxiong4118]

Did you have to change the DME?

[@Jbpgarage]

Yes

[@820performancecomptonbro4]

Hey what up buddy I have a 2015 bmw n20 engine and I replace 4 injector now the car don’t want to start I check spark fuel ok but don’t have compression it only at 90 psi 1-3-4 and 2cyl 119 psi any tips no code

[@Jbpgarage]

The car should start even with low compression. Did you program the injectors after installation? They have to be calibrated.

[@820performancecomptonbro4]

@@Jbpgarage yeah I did program

[@dang3402]

Great video. Now I know what to expect. Was ur eccentric shaft bad too? Dealer is changing my valvetronic motor $3400. They that if eccentric shaft is needed it’ll be a total of $5200. What would a bad eccentric shaft look like? Why would it go bad.

[@Jbpgarage]

Thanks, I only replace it cause it was recommended. But mine didn’t need it, the go bad by pitting .

[@LukiMukiify]

where did u get ur dme from? plus what else did u have to do after installing dme? I just replace servomotor and I keep getting a error code when I try to relearn process

[@Jbpgarage]

I bought a used DME from the same year and model as mine and had it cloned by RPM MOTORSPORT.

[@LukiMukiify]

@@Jbpgarage rpm motorsport from nc? if so how much it run u and did u have to reprogram dme? and thanks for fast response!!

[@Jbpgarage]

I believe they have different locations, but I was told the cloning was done in Canada. It run me close to $500, had to ship my original DME and the used one. Didn’t need any program when I got it back.

[@LukiMukiify]

Thank you so much and keep the videos coming, appreciated!

[@MichaelHodon]

Where you located? Mine still starts but I need this done and don't have all the proper tools or time.

[@Jbpgarage]

SoCal!

[@MarioS1000RR]

God bless your hands mate

[@lxizzHD]

Man I have a n55, and the first diagnosis said code is Valvetronic disabled. So firstly, what if you replace only the servomotor and then try the relearn test plan but fails. 2 weeks later.. the car does not crank or start. The diagnosis showed second time said starter is dead and servomotor is too. Will it be okay to replace only servomotor the second time?

[@Jbpgarage]

Yeah, shouldn’t be a problem replacing just the servomotor if that’s what the problem is. If you replace it with a OEM part, I would just go back in and recheck everything. Make sure you have the car on a charger when running the relearn, also you have to be connected to the internet for it to work.

[@lxizzHD]

@@Jbpgarage do you think that I need to do the relearn process asap right after the install of the 2nd servomotor? Or Will it be safe that I could drive 70miles to the dealer for the ista+ I don’t why first time did not work I wait like 11 days to do relearn and it failed.. faulty servomotor? The only code I have is 2EOF disabled vvt.

[@Jbpgarage]

@@lxizzHD Did you set the Valvetronic at maximum lift during installation? After installation make sure you have it at maximum lift, the car should be able to run without the system, then when you do the relearning the DME will make the adjustment.

[@lxizzHD]

@@Jbpgarage ok my car may have arrived by the tow truck early today to the Indy mechanic shop, and I will tell him tomorrow morning! Can u explain me how to tell him?

[@Jbpgarage]

If it’s a BMW shop they should be able to check it and see if it’s working.

[@dnup9392]

I have a N55 535i . When I unlock the car, I hear a rattle/wrenching sound coming from the engine. Only happens when I unlock the car. Battery was low in the winter, but now I dont have battery low warning. Car starts right up. Any ideas what needs to be done?

[@Jbpgarage]

That’s probably your Valvetronic motor coming on, it probably needs to be reset.

[@demoonpr]

Did you fix the problem I’m having The same issue

[@dnup9392]

@@demoonpr Do you hear it when you unlock the car?

[@dang3402]

I’m having the same issue. Bmw dealer said my valve is bad. They ran a diagnostic first. Was showing low voltage but they found my batter was original to the car 2014. They changed the battery programmed it to the car and updated my software but it didn’t fix the valvetronic noice. Parts and labor $3500. $5200 if they see the eccentric shaft bad. I’m pissed off.

[@dnup9392]

@@dang3402 $3500 to change the valvetronic motor?

[@DearMajesty]

How did you get ISTA?

[@Jbpgarage]

From a friend.

[@patrickconway2587]

Your kid had the same reaction to that price as i did!

[@sandimastodd]

Dude u have amazing patience, i think i have the same problem. What a fucking pain. Just did ex cam vanos and valve cover last year.... im so mad now another major surgery..... my wife's rig she loves it so much.... ugh. 😢 what's another 3k right?? Excellent job by the way....

[@Jbpgarage]

Thanks appreciate it, I feel your pain, I am trying to get it to pass smog right now. Why doing the vanos on my S54 😭. BMW problems, it’s like a love, hate relationship.

[@sandimastodd]

I hear ya,great rigs for the most part,but Jesus help us when they break.... always something, guess that's the price we pay for an amazing drive,great performance and safety....... family first.

[@anhlam4]

We bought a used 2013 X5 V6 with a bad engine. We bought & installed a used engine, crank but no start, couldn't figure out why. We brought it to bmw dealership, they charged $150 diagnosis & got it start. They said power supply connector for DME is unplugged & many other connectors loose. We didn't think anything was loose. Anyway we agreed to pay $370 more for further diagnosis. They said valvetronic motor, fuel rail pressure sensor, oil pressure sensor, intake air pressure sensor are all bad. We still wonder how they got it start in the first place.

[@Jbpgarage]

They probably reset the Valvetronic motor and that’s how they get it started. It was probably stuck, cause it fails slowly over time.

[@mblydenvlogs]

What happened. Why did you have to replace?

[@Jbpgarage]

The car was a crank no start, Valvetronic motor went out and fry the DME.

[@mblydenvlogs]

@@Jbpgarage I’m experiencing the same crank but no start. I hope I don’t have to replace the DME though. How can you tell if it’s the DME itself has gone bad?

[@Jbpgarage]

@@mblydenvlogs check the Valvetronic motor connector, if I remember correctly there’s 3 pins, one is power, ground and signal. With key on check and see if you are getting 12 volts.

[@tuancaominh]

@@Jbpgarage if reading no voltage at all then the dme is bad right? But I can hear the rattle sound from the valve motor that’s mean there is some voltage feeding to it right?

[@Jbpgarage]

@tuancaominh if you unplug the valve motor and turn the key on do you still hear rattle?

[@racingbashingrcs8330]

couldn't you just replace the motor? What was wrong with the shaft?

[@Jbpgarage]

Didn’t want to do it twice, so I replaced all the parts BMW recommended.

[@Thebmwexperts]

You were supposed to take the springs off and clean them and replace the bolts on top

[@Jbpgarage]

Didn’t see that in the manual.

[@drlove2023]

Can you send the part number

[@Jbpgarage]

Sure, any part in particular?

[@drlove2023]

@@Jbpgarage for all the parts

[@Jbpgarage]

Just added a part list to the description .

[@_Wai_Wai_]

Jeez, $3 grand? not cheep.

[@endritpasho5578]

Great job. you saved lots of money. I get these codes: P10E5, P10F5, P240B, P2419, p2401 . Any idea what they mean?

[@dannytorres308]

P10E5 Code - Internal Control Module Error Control Circuit Valvetronic--P10F5 BMW Code - Valvetronic Control Phase V Circuit Open Bank 1--P240B Code - Evaporative Emission System Leak Detection Pump Heater Control Circuit Low--P2419 OBD-II: Evaporative Emission System Switching Valve Control Circuit Low. A quick google search will give you many probable or known causes for each code. Hope this helps and good luck.

[@Jbpgarage]

Sorry just seeing this. Yeah what Danny said, process of elimination, clear all codes and see which ones comes back.

[@dannytorres308]

@@Jbpgarage agreed. From first glance seeing these codes tells me you have a possibly faulty valvetronic motor and an evap system leak/ issue.

[@larvae91]

Do you have to change the oil after or top off?

[@Jbpgarage]

Change

[@Thebmwexperts]

You were supposed to take the springs off and clean them and replace the bolts on top