BMW N62 tapping noise followed by rough shake on cold start from left side of engine (bank 2)
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- BMW N62 B36 tapping noise that is followed by a rough 2 second shake on cold start ups (the lower the temperature, the worse the noise). This only happens for 30 seconds when starting the car. There is no piston slap. only fault codes are for additive fuel mixture control limit reached (mixture too lean) 272C and differential pressure sensor plausibility. After the shake occurs as shown in the video and the lifter like noise disappears, the car runs very smooth and fine with no issues.
when the oil was drained in January 2022, there were no metal flakes or bad dirt within the oil or filter. There more than 3/4 of 5w-30 engine oil in the engine and it is not burning any oil. this issue has been happening for the past 2 years and happened out of the blue. Since the issue has occurred, the car has been driven for 10,000 KM and had the oil changed twice.
if anyone has encountered this issue on the BMW N62 engine, please let me know. - เพลง
The issue has been isolated to the valvetronic on Bank 2 (the bank with the problem). When the N62 has a cold start, the valvetronic enters a transitional period as confirmed by a BMW service bulletin where a similar issue was known to be prevalent on N62 engines produced from 2004 - 2005 (735,745 and etc). The action to be made according to the bulletin is to replace both eccentric shafts, all intermediate levers and then reset all adaptations and etc. In this case I disconnected the eccentric shafr sensor and ran the car with no noise or rough shake which happens when the throttle variates from valvetronic during the cold start if i am correct. Even though it was disconnected, the car ran fine until after 5 minutes where it entered limp mode at high speed and RPM due to the valvetronic being disconnected. When I do the valve stem seals, I will be changing the valvetronic assembly on the affected bank with a good second hand one from another engine.
Now this issue has been happening since 2021 and the engine has covered more than 30,000KM since then and still runs the same despite this I will now fix it with other issues that have developed within the car at once.
Additionally I will produce another video of when I perform the repairs and once hopefully successful.
Bei mir war genau so mit gleichen Motor Bmw n62 Bank 1. Kaltstart paar Minute laut geklackert- Grund: Falsches Öl wegen Vorbesitzer Castrol. Ich habe Rowe Öl 5-w40 LL01 Blaue Verpackung Hightech eingefüllt. Weil normale Öl verliert nach 100 grad seine viskosion und bei dem Motor wird Betriebstemperatur 120 grad -Danach zwei Magnetventile erneuert. Startet jetzt sehr sauber.
ganz genau. Das beste Öl ist Rowe 5w40 für diesen Motor. Leider wird von BMW Castrol 5w30 empfohlen. Mit 5w40 auch kein Blaurauch.
Just went through this thought I had a knock. I replaced sparks n coils. Did oil change but during oil change when I dropped the oil I left screw out and poured some heavy oil stabilizer and a quart of oil right through. So many dark deposits came out. Then I did a carbon clean because the pistons are slapping from build up. Have to put it into I take boot after the maf n spray. Sea foam or gdi cleaner. Clean your maf with maf cleaner. And get throttle body cleaner n clean the valve. Put it all back together.
Absolutely the same issue on mine. Been like that for a whole year, no issues whatsoever.
The car is still running. I will be replacing the timing chain tensioner tomorrow and will let you know if that fixes it or not.
@@frederiquekruger4818 any update?
Yes please, do u have some new info?
@@pauldoyle5627 @mareklacnak9122 no updates yet, issue is still present and the car is still being driven like normal. I haven't had the time to pull the engine out but when I do, I will make a video of what I find. I believe it may be either a VANOS issue or an issue with the rocker arms. It is very strange and I've never encountered this before.
@@mareklacnak9122 still the same story, I will pull the engine out and make a video on it in the next 3 months or so.
Oh dear... so many things could be the culprit.
But lets get on it:
-1st get a diagnostic tool. INPA or better yet ISTA
- try to up the idle a bit and reach 1500 or 2000 and see if the ticking noise goes away or just gets faster. If it goes away you may be low on oil or the oil is just not getting properly pressure to reach all spots. 1st is easy, just top it up, 2nd could be a bit tricky (oil pump, wrong type of oil...) but no big deal as well.
- oil again - have you the correct one? How old is it? Filter has been changed? Status okay? N62 is picky about its oil and many engines died just because their owners thought "they can take it a lil longer". Turns out they can't. Oil isn't expensive, just change it as the interval says :)
- it seems like you get a misfire as well and the engine ECU tries to even it out right after that. IMO guessing by the 1sec delay you might get more then just one misfire at a time
- the rattle MIGIHT be the chain as well and if so that is a whole different story of a "pinche cabron" problem :D
Try these tips one by one and see where it gets you. Remember - there are two kind of engine problems: one where the engine runs but not well and one where the engine does not run anymore :) you are still on the good side of things.
I used ISTA and other diagnostic equipment and the only codes I get are the fuel mixture codes (bank 1 and 2) when the car is warmed up it runs smooth and idles perfectly and is very quiet. Better than my friend's 750i f01 believe it or not.
When the idle increases, the noise disappears. Again this only happens for 30 seconds (at most) during cold starts.
Even with a full oil level it still does this. I am thinking of flushing the engine and if that doesn't solve it, I'll remove the valve cover and clean the cylinder head from the top.
The effect to me doesn't seem like a misfire but is rather more an extremely aggressive shake for a brief 1-2 second/s. I say this because I have another 745i that was misfiring on most cylinders due to bad ignition coils and the effect is far more different.
Edit:
I forgot to mention that I run 5W-30 Full synthetic engine oil. I do believe that it is an issue of sludge but I can not understand the 1-2 second shake which stops the tapping noise.
@@frederiquekruger4818 it is always a good thing to start with the easy stuff. Oil changes are one of them so sure go ahead and see what it does. If you have no memory on how far back the last change was then it is that much a good idea to do. Other ideas might be lifters or valve stem seals....or many other things :D It could also be just fuel related. Like a bad quality product. Mercedes has an option within diagnostics where you can shift the ignition point based on what country and fuel quality you have but I don't recall seeing this on any BMW SW ever. Anyways GL with your troubles
Maybe try a Cylinder Head Oil Check Valve looks like a torx bolt use a t40 theres 6 of them i think if you remove the throttle body maybe the whole intake manifold but should give you access to them, i would give it a shot
Also new vanos solenoids like I saw somewhere if you only cleaned you very well could just need new ones
BMW N62 B36 tapping noise that is followed by a rough 2 second shake on cold start ups (the lower the temperature, the worse the noise). This only happens for 30 seconds when starting the car. There is no piston slap. only fault codes are for additive fuel mixture control limit reached (mixture too lean) 272C and differential pressure sensor plausibility. After the shake occurs as shown in the video and the lifter like noise disappears, the car runs very smooth and fine with no issues.
when the oil was drained in January 2022, there were no metal flakes within the oil or filter. There more than 3/4 of 5w-30 engine oil in the engine and it is not burning any oil. this issue has been happening for the past 2 years and happened out of the blue. Since the issue has occurred, the car has been driven for 10,000 KM and had the oil changed twice.
if anyone has encountered this issue on the BMW N62 engine, please let me know
Is it a lifter? Also u ever receive a p0019 on this motor?
@@devontaykarter6648 no fault codes for the valvetronic, vanos and camshaft sensors. I will try to flush the engine.
Bro stis engine never give folse code if problem in valvetronix
Try to swop solenoid valve from right to left
I know you're asking for info, but you should keep posting updates i'm really interested in seeing the progress. I had just bought an 04 645ci a month ago
Collapsed valves, chain tensioner Collapsed? Had a mitsubishi endeavor with Collapsed belt tensioner, it rattled on cold start for a minute.
The sound goes away after 30 seconds on cold starts. It doesn't happen when the car is driven. I have concluded that there is an insufficient amount of oil reaching that cylinder head on cold starts. I have been driving the car now lately and it runs fine. The lifter noise happens on extremely cold conditions. I will be flushing the engine, putting 5w-30 full synthetic, liquimoly motor protect and other additives to see the result. If that doesn't stop the problem, I will remove the valve cover and inspect. If I find a problem with the lifters, I will recondition the cylinder heads as the valve stem seals are known to fail on these engines. My theory is that the previous owner did not change the oil on time so there may be some sludge in the oil channels hence restricting oil flow to the cylinder head on cold starts. I will provide an update. I will also inspect the upper chain tensioner and the VANOS if I get the valve cover off.
Solenoid valve spreads the oil in to vanos sistem try to swop solenoid
@@mukamorazmuhammedov6875 Already changed both solenoids. Issue still present. I will drop the engine and transmission in the next 2 months for a gasket refresh and to fix this issue.
my friend, find a similar motor from someone and try to transfer solenoid valves from it. one of them is jammed, but still a live . If you have already solved the problem, then write what the problem was.
sadly I haven't solved the issue yet. I have cleaned the VANOS solenoids and the issue still persists. I will replace the VANOS solenoids and will let you know what happens.
Try updating the software. I heard that was the case on another bmw
This is a lifter issue
I have the exact same engine with the same issue. Really want to know what the problem was
Problem solved meaby? :)
Its been solved? Need the updates
No, I'm still driving the car. I believe there is a problem with the VANOS so when it is time to do the valve stem seals, I am going to remove the camshafts and check which won't be anytime soon as I am already doing the stem seals on my other car (745i e65).
@@frederiquekruger4818timing chain loose??
@@radianm6 If it was loose it will be present at all times and I will have a code stored in the DME for the timing or the valves would hit the pistons. In my case I will need to pull the engine out and see what is going on. Regardless I will do that since I need to change the valve stem seals and other gaskets.
Hello, please do u have any update please?🙏
no updates yet, issue is still present and the car is still being driven like normal. I haven't had the time to pull the engine out but when I do, I will make a video of what I find. I believe it may be either a VANOS issue or an issue with the rocker arms. It is very strange and I've never encountered this before.
SOLVED??
What was the issue?
Hello have you figure out what was the issue mine does the exact same thing and I am thinking it’s the excentric shaft sensor ?
I'm still having the issue however the tapping noise doesn't happen often now since I am regularly driving the car. The rough shake happens after every cold star. I recommend you remove the valve cover/s and check the camshafts and eccentric shaft as well as remove the oil sprayer bars and clean them if you're having the tapping noise. Usually a bad eccentric shaft sensor will cause a check engine light and misfires.
Hei Frederique if you are still having this issue try to change the pcv valves(even though you changed them try a different brand don’t use swag) and clean the maf sensor 👌
Don't touch excentrical saft i have 545i n62b44 same issue like yours.but i didn't repair i just swop engine.probleme gone
@@eduardduca4535 If your issue was the same, was it from the PCV valves? I find it interesting and weird that a compromised CCV/PCV diaphragm will cause this.
Was this ever solved sir?
Nope, still running to this day more than 15,000km and multiple oil changes later. I suspect it has something to do with the valvetronic or the vanos. Only way to be sure is to remove the valve cover but I don't have time and if I remove the valve covers, I will be changing the valve stem seals.
valvola è bilanciere rotto
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