20,000km UPDATE! Everything Wrong With My BMW N52 Engine Rebuild Project! [PART 2]
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2 жыл бұрынWe rebuilt my BMW N52B25 engine in my garage because it was burning oil at 1L/300kms. This is everything that went wrong with the rebuild PART 2.
👉[PART 1] Everything Wrong With My BMW N52 Rebuild : • Everything Wrong With ...
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@SKWDMDYT 2 жыл бұрын
Excellent content!
@buildanddrive 2 жыл бұрын
Thanks Steve!
@julesmestrom8039 2 жыл бұрын
Nice vids! Just had the same issue. No codes, during cold and warm start up revving up to approx 2000 rpm. Rough idle. Felt loss of power and also gas pedal les responsive. Also sometimes noticed hard shifting trough gears (AT). Cleaned and replaced vanos solenoids and cleaned vanos filters. Idling was better, but the rev still showing up. The high rev is because of loss of oil pressure in vanos system. I checked my camshaft positition sensor and it was bad. Replaced intake and exhaust camshaft position sensors. These will also contribute to the timing of your vanos system, they are responsible for the correct position of the camshaft. After replacement one big rev (repositioning camshaft due to good reading). Problem solved, still a little bit of rough idle and wobbles, but not that often. Only during long idling and cold start. Rums like a charm, shifting properly, gas pedal responsive is nice and also the power is back. Just noticed a whining noise in the back of the car... probabaly dofferntial or wheel bearing. BMW never fails to perform maintenance hahaha Good luck with your build and keep up those vids! Curious of the oil indeed will change. Also curious if the thicker oil increases metal teardown faster.
@buildanddrive 2 жыл бұрын
I found vacuum leaks that I fixed. It helped with the rough idle on cold startup.
@unixnerd23 2 жыл бұрын
It's easier to get the VANOS filters from the wheel well by pushing the arch liner out of the way. One of my VANOS solenoids clicked fine with a battery but still gave fault codes until I replaced it. When you reconnect the coils be certain they're plugged in right. You can shut the cap down with the plug 1mm out and it causes a missfire.
@Er8Top1 2 жыл бұрын
Keep up the content man in many ways. Word advice to you sincerely and seriously, I've been in your position to believe in yourself to continue the journey. Watched some of your videos. Do not give up on yourself but most importantly have consideration those around you. I say this because I've reach my limit to lose and let go my time and effort on my experiences in cars. I can only say this, acknowledge the BMW as a hobby weekend car. This is the time you ask yourself, do you really want it to be like this when you can use your time and money for those importantly around you. Its a joyful feeling to know everything goes well as plan but where there's success, failure occurs along the way. Stay positive and share it who you care and love. Its time to check and realize its okay to take a break or let go. This is for those who knows the struggle is real.
@buildanddrive Жыл бұрын
Thanks so much!
@vincentcooray9269 2 жыл бұрын
Nice video bro 👍
@buildanddrive 2 жыл бұрын
Appreciate it Vincent!
@dariopranckevicius1250 Жыл бұрын
Awesome channel! I am also rebuilding a N55 and your videos are helping me a lot! I am curious for an update on the oil analysis and the cause of this rough idle.
@buildanddrive Жыл бұрын
Thanks! Here is the engine oil analysis kzfaq.info/get/bejne/q89oerGEqLfPpXk.html The cause of the rough idle is here kzfaq.info/get/bejne/lZuDld1plp69hn0.html
@CatharticTV 4 ай бұрын
Suggestion: A Mazda is a better car, has less problems, is much easier to work, and handles just as well as a BMW. No one should have to go through what you are going through. I rebuilt my Mazda 3 and did not have a single issue afterwards for 5 years until I sold it. Now I am rebuilding the engine on my N52 and learning about all the potential issues and the difficulty in accessing something if it fails. I realize my mistake and will be selling the BMW asap and getting a Mazda MX-5. Life is too short to deal with BMW's over-engineered bs.
@buildanddrive 4 ай бұрын
Completely agree. The BMW is a ton of fun to drive but you literally become a mechanic just to keep it on the road.
@VendestM 2 жыл бұрын
Hi, thank you à lot for your vidéo, it's very helpful for me. I have a question in case you know. I am replacing my cylinder head gasket on my N52. On the top of low motor and around the cylinders there is a dark gray layer, it gone a little when i clean this part. Do you know what it is and what it is used for? thank you !
@buildanddrive 2 жыл бұрын
Can you send me a photo on Instagram?
@mrdiy6975 2 жыл бұрын
Rough idle: inpa fault code reading will expose reason, ie. misfire due bad electical connection to coil, if so, coil connector reinstall may help to that.
@buildanddrive 2 жыл бұрын
Yeah, haven't gotten that code before. I haven't had misfires in a long time. Just the rough idle and no codes for it.
@kapilapatikiriachchige7658 Жыл бұрын
Mine. I rebuild Cylinder head with new valves. and after started there is noise, like lifter adjuster noise. didn't go away after couple of weeks. and also Exhaust cam and Ledger scored a bit. I did not replace Ex cam or the ledger. and the HLAs are solid. cannot compress by hand. is that normal or collapsed? Is your car engine noisy like tappets? Thanks reply to me if you can..
@buildanddrive Жыл бұрын
My engine sounds great now. No noisey tappets anymore. Maybe a tappet has fallen off when you put the camshafts in. That happened to be and I had to redo it a second time
@p4r4z1t45 2 жыл бұрын
Will be interesting to hear on 5w50 consumption
@buildanddrive 2 жыл бұрын
Yes, it will be interesting. I will run the 5w50 until the oil light turns on and then fix the vanos seals and run another 1L of oil to compare how much that leak was causing.
@amg11901 2 жыл бұрын
Sparkplugs with torquimeter , clean solenoids connectors with contact cleaner, make sure coils are connected all the way, oil filter with torquimeter.
@buildanddrive 2 жыл бұрын
What are the torque specs.... Mine are torque to "snug" because it's normally something like 10-20Nm but my wrench doesn't go to that low lol
@amg11901 2 жыл бұрын
@@buildanddrive I had same issue. My coils are not the correct ones for my E90. Maybe if you doble check your coils are making full connection.
@buildanddrive 2 жыл бұрын
How would you check that? I replaced a few coils years ago when they failed. Haven't had issues with coils since then.
@hanynowsky Жыл бұрын
N52b25 from factory does 225psi. Compression needs to be tested after eccentric shaft is angled to 176 degrees.
@buildanddrive Жыл бұрын
Yep, I should try that next time
@gopnik678 2 жыл бұрын
I have question))) why fan wont kick on. Where is fan switch in n52b30a
@buildanddrive Жыл бұрын
The fan switch should be related to the coolant temperature sensor.
@kapilapatikiriachchige7658 Жыл бұрын
Compression going up after engine oil squirt into cylinder, that mean Piston rings not sealing up. I would Rehorn cylinders and put new Piston rings. that fix the issue. am I right? :):)
@buildanddrive Жыл бұрын
Yes. But use the correct hone for n52 alusil engines. It's not the one I used in my video
@buildanddrive Жыл бұрын
Also check that the bore is straight and not oval
@sleepyduck Жыл бұрын
isnt 5w50 engine oil viscosity too thick for n52 engine?
@buildanddrive Жыл бұрын
Possibly. I didn't find any issues with this brand of 5w50. Some are thicker, some are not. I couldn't find what the correct flow rate the n52 requires. But I cross checked the 5w40 and it's not that much more. 5w50 is overkill for this engine, you don't need it unless you are racing. And then I would use a good 10w40 or 10w50
@bobaphat3676 2 жыл бұрын
Hey man great video. I got an 2009 n52b25 (136k km), uses approx 1L per 6000km of 5w30. If I switch to 5w40 it's about 1L per 7000-7500km. Valve cover needs changing, OFHG done, not sure the valve stem seals or rings. One thing is more sure, these cars CONSUME OIL. This 2.5 in a 325i coupe lacks torque, the car constantly has to downshift in automatic guise. They are efficient and smooth, and adequately powerful. BUT, the Lexus 2GRFSE is superior to the N52B30 and the B25. That engine combines direct and indirect injection, produces higher Torque/Litre and is generally more reliable. BMW dropped the ball on the B25, the B30 is excellent though.
@buildanddrive 2 жыл бұрын
Your oil consumption seems great! I don't see anything wrong with those numbers. Haven't heard of that Lexus engine, what car is it in?
@bobaphat3676 2 жыл бұрын
@@buildanddrive is350, toyota crown and a few others...but BMW is still on top for driving dynamics. The new B58 is a great engine.
@buildanddrive 2 жыл бұрын
I had a 2jzgte Toyota aristo back in the day. It had the gs300 body. Awesome car. Always liked the IS series
@bobaphat3676 2 жыл бұрын
@@buildanddrive gotta love the JDM legends.
@Saicopateful 2 жыл бұрын
Sorry to rain on your parade but to my taste 170 psig is not close to original numbers. You have significant difference between cylinder pressures. Healthy N52b25 should be pumping 190 - 200 psig with +/- 10 psig. Mine B30 cold is 190 psig on all cylinders +/- 5 psig. And the engine has 300k km milage, no rebuild. So putting heavier oil and blaming flawed pistons is not the cure. As was said, you might have destroyed piston-cylinder gap with heavy honing. Did you measure the piston-cylinder gap before assembly in the first place? Or ot might be the valves not sealing. You'd be better off with leakdown tester. It will tell much more than just the simple compression test.
@buildanddrive 2 жыл бұрын
Thanks for the comment. It's good to share this info. My old engine was 160psi + or - 10 psi. I know it was not in the best shape. Bentley manual I think states over 150psi is considered fine. As you can see in the video, the pressure jumps around from 175 to almost 200 then back down to 175 on cylinder 1. I think I will retry cylinder 1 sometime because its wierd that it's 10psi lower than the rest. Car runs pretty strong at the moment so I am not too worried. I don't have a leak down tester but maybe I can find one. I'm more worried about the oil and vacuum leak atm
@JT-ol7hx Жыл бұрын
What year is this motor and does it have the 3 stage manifold?
@buildanddrive Жыл бұрын
It's a 2005 and it has the 3 stage intake
@JT-ol7hx Жыл бұрын
Whow! This crazy thing just wiped out several comments and questions. Don't have time to rewrite now. Mainly just saying thank you, it's because of you and others that I can keep my little 325i maintained and I fully intend to keep it . Seems most people here have no idea as to the performance of these automobiles. Well at least not until you pull up beside them cruising about 85-90 mph ,and these cars love that speed range, 28-30+ mpg, temp gauge sets in around 190°, motor holding a steady 2500rpm"s and for some reason even the ride is smoother.. Thank you!
@John-yz8dp Жыл бұрын
You never diagnosed the problem with the original engine. So, was it the condition of the piston rings, carbon on the pistons, etc. Are you going to do that at some point?
@buildanddrive Жыл бұрын
Yes. I need to do that soon before winter hits
@robertharlock1070 2 жыл бұрын
sometimes i love how we have a similar issue after a rebuild lol
@buildanddrive 2 жыл бұрын
Lol. It's the #bmwlife 😂
@dominik7841 2 жыл бұрын
You did really rebuild a N52 engine that burns oil and didn't use the new piston design? 😅
@buildanddrive 2 жыл бұрын
Yes. New piston design was around 800$ with rings at the time. My engine was 450$ 😂. I thought the engine would get at least 1L/3000kms which I am happy with. But it gets half that. I will fix the final vanos oil leak and, after a year of trying, get the correct oil consumption measurement for this rebuild n52!!!! 👊🏼
@rowen898 2 жыл бұрын
You need ISTA D or INPA software !!!
@buildanddrive 2 жыл бұрын
For what? I have inpa.
@Dutch79 2 жыл бұрын
5W30 to 5W40 didn't have an effect on mine. But why 5W50? Your code are caused by cars full of oil. What's up with the scarf?
@buildanddrive 2 жыл бұрын
What do you mean by 'your code are caused by cars full of oil'?
@Dutch79 2 жыл бұрын
@@buildanddrive correction: cats (catalytic convertors)
@buildanddrive 2 жыл бұрын
That's for the clarification. I looked into the catalytic converters when I had then off and they looked fine. It's in one of my videos somewhere. Honeycomb looked good. Also if it was burning oil, it would have been bank 1 (cyl 3) was burning so badly, the spark plugs would clog after only 5k of driving. So why catalyst codes on both banks?
@Dutch79 2 жыл бұрын
@@buildanddrive I don't think looking at the honeycomb is enough to be sure it is working properly.
@buildanddrive 2 жыл бұрын
How do you check it then? Lambda sensors show everything is working correctly but still I get these catalyst codes randomly, normally on light throttle when deceleration
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