N20 Complete Engine Rebuild - Project 328i Part 3
In Part 3 of Project 328i, we rebuild this N20 from the ground up. Freshly honed with new pistons, new rings, step by step, bolt by bolt.
Thank you to everyone for your support! If you enjoyed the video, drop us a Like!
00:00 - Intro
00:32 - Block Overview + Piston Oil Squirters
02:20 - Crankshaft, Main Bearings + Bedplate
10:26 - Front + Rear Main Seal
11:37 - Crankshaft End Play
12:30 - Piston, Weighing, Balancing
22:10 - Piston Rings, Gaping, Installation
26:46 - Rod Bearings
33:11 - Cylinder Head Overview
34:48 - Carbon Cleaning on Lathe
36:28 - Ultrasonic Cleaning
37:48 - Valve Lapping
42:11 - Valve Stem Seals + Springs
44:42 - Eccentric Shaft
46:47 - Exhaust Camshaft
49:14 - Intake Camshaft
50:00 - Valvetronic Rockers + Springs
53:54 - Install Cylinder Head
56:04 - Final Thoughts
Nice christmas gift ❤ Thanks for letting us be part of this extremely detailed rebuild!
Merry Christmas Nik. Seeing you is a gift of it's own. God Bless
Never watched a video this long about engines in my life but you make it so interesting. Thank you 🎉
With m539 restauration by far the best BMW KZhead channel can t wait for the next video Nüral is a OE supplier they belong to Federal Modul. They made a lot of pistons for the BMW diesel engines like the M57 or N57
Alex’s channel is fantastic. Sreten is bigger with 100% full time dedication with much bigger resources and sponsors. As far as knowledge and attention to detail on the important specifics, you can’t say one is better than the other.
A great Christmas present
Thanks, great video, deserves a lot of views and the channel deserves many more subscribers! Outstanding detail and work through together with first class editing.
i cant wait for part 4 your the most educational video maker for the n20 on youtube
Your videos are more detailed, thats what am looking for, 10/10 🔥👌You make it look easy, I just subscribed waiting to see more
Thanks bro! Very helpfully! Make reassable same engine at first time by myself :)
You are the best when it comes to explaining we need videos like that keep up the good work
Yessir another Bimmerdoctor vid
Your hired❗️ Only you can touch my bimmer❗️ Only if you lived in TX.
Great episode, very detailed
That BMW special tool cleaning block is unreal. I got one for myself also after seeing the M539 and h2 Motorsports video. BMW is probably wondering why that block is flying off the shelves all of a sudden 😂
Great job!
Good job! Waiting for the next part!
Great job my firend...Keep up the amazing work and the channel will definitely grow over time! New subscriber from Montreal!
Great video 😊
Great video!
great job😀
Merry christmas doc
This really helped tremendously, great video on this N20 engine. One question though. What was the torque specs on the little top spring bolts?
This head would have massive gains just prom the intake bowlwork!
Great video, can someone provide me the part number for the crankshaft main bearings, and connecting rod bearings part number
Love the detailed explaining as always. Very thorough 👍 When i try to do this myself, i have one concern. When reassembling the head, and before lapping the valves; do the valves need to go back in the spot where they came out of? Or can i get away with putting them in a different spot and just lap them? And what about springs and lifters, same place or can be put in a different spot? Thanks!
Thank you my friend! You are supposed to put everything back in the same location. What I did was use a lot of ziplock bags and label the position of everything I removed, so that I could make sure it goes back together properly. Realistically I don’t know how big of a difference it could make by changing the position of something like the springs as they should be pretty much the same, but I rather just take the extra few minutes to put everything back in the same spot.
Hey what up buddy I have a 2015 bmw n20 engine and I had a cylinder 1,3 misfires and found low compression what do you recommend rebuilding it or buying a use low mileage engine and also where to buy it if you know a good place to buy it
Where is part 4 bro I need to put my engine back together
If I may ask can I use the same number to torque my e 87 because they look the same
Which service manual do you use? I haven't found this level of detail on ISTA
Hi mate. I messed up timing of my n20 when the flywheel locking pin didn't go all the way in as I was timing the cams. Now my crankshaft is not inline with the camshafts hence timing is off getting codes 130e20 and 130f20. How do I get the crankshaft and the camshafts back in line at tdc? Please help
+1 sub
They are ok clearances of 0.063 in the connecting rod ..... I tend to specify that in the old bearings it was 0.050
Hi there, according to the service manual the spec is 0.025 to 0.071mm. You are very close to the high end of the scale but still technically within spec. Personally, I would maybe try a different set of bearings to see if they fit better.
Thank you very much for the information
A whatsapp number or a facebook contact
Did you check if balance shaft is seized? No way that would be a seized alternator if you couldn’t turn the engine even with breaker bar
Hey I noticed you had two guide bearings one in your block and one in the bed plate. Well mine only has 1 guide bearing in the block and a regular bearing in my bed plate? It's never been rebuilt or anything before so that was done at the factory. Is that common or? My bed plate has the groove for the guide bearing as well. It was just not one placed there. Hmm. Have you ever heard of that, will it be alright to reassemble the way it was cause my bearings are mint?
Totally fine to reassemble like that. Originally the N20s only had one (like this one originally) but over time they had a revision to include two. Not sure what issues they were seeing, but I just put the updated parts in and my end play was within spec.
@@bimmer.doctorOk cool thanks. Was curious because the bed plate has the cut out groove for the other guide bearing so started looking at my bearings saying to myself I don't recall taking two of those out. Lol I appreciate it very much.
Where is the link to the service manual
What kind of oil are you using in your oil squirter can for the cams etc? Break in oil or just the regular Castrol Fully Synthetic?
The pink assembly lube is Redline and the oil is Castrol but non synthetic mineral oil. When I fill it up that's what I'll use to help break in the new rings and then switch to regular full synthetic after that.
@@bimmer.doctor Ok cool! I have some of the pink Permatex Extra slick lube on the way cause I thought that's what you were using on your cylinder head/cams. And I thought you may have some of the break in oil, Driven, Motul or something like that as far as a mineral oil. Ok in that case I'll probably order up 10 or so quarts of the Driven 5w30 for the break in period. Flush It out after 30 minutes or so after keeping it around 2k-3k RPM's pretty steady then drain that and come back with another 5 quarts of Driven and new filter for the 2nd stretch of around 500 miles for raising up my RPM's more to better set the piston rings. Then after 500 miles flush that and come back with my Castrol Edge fully synthetic that I normally use in it. Getting closer to having everything to start assembling Lol Appreciate the info on everything.
That sounds like a great plan! What engine are you building?
Or if cheaper I may check into the Castrol mineral oil you're referring to cause I'm sure it's probably cheaper than Driven. It's definitely on the pricey side but really good break in oil. Thanks, appreciate the help.
@@bimmer.doctor Same one you have here except it's in (or was) in a 2014 BMW X1 28i S drive. N20B20. A buddy of mine gave me a $25 dollar Chinese head gasket to use, and I'm like buddy I really appreciate the gift there but that's exactly why I'm tearing this bimmer down is a blown head gasket. Lol The OEM head gasket is only $126 on FCP EURO and it lasted 14 years so my experience tells me to NOT under any circumstances even considering installing this $25 head gasket that he picked up no telling where. It even looks extremely cheaply made. I'm guessing your build is running well?
Hey I have my cylinder head pretty much finished up with new valve stem seals and lightly lapped. It wasn't too bad. And I have them with QR codes facing upwards like you described to do but noticed a couple of my exhaust valves are slightly opened when I torqued down the exhaust cam to the 12 nm. Is that normal , will they bleed down or what? I heard not all valves are closed at TDC on some cars but it was a question I figured you may know the answer to? I even took it back off and compressed the springs down again to make sure everything was seated properly and when I installed it back and torqued it back down the couple of valves are still slightly opened.
Yes that’s correct, not all valves are closed at TDC. If you want to check to be sure everything is good, just manually rotate each cam a full rotation and make sure all the valves close at some point.
@@bimmer.doctor Man I appreciate that info cause I wasn't sure and I'm trying to do the best job possible and wasn't going to install the cylinder head on the block until hearing back from you or finding out somewhere else. I couldn't find it on Google anywhere. However, I ended up stumbling up on a video that said TDC on exhaust side should be slightly open or at least a couple of them or whatever, and TDC on the intake side the valves should be closed and my intake valves are closed and both cams are facing upwards with the barcodes as you said do. I've done this job exactly the way you instructed so I figured i was doing it by the book 📚 lol
@@bimmer.doctor I know that makes me feel much better and now I can proceed on to the next step which is installing the pistons and new rings in the block. I don't see the logic in doing a rod bearings clearance test as I did on the crank cause my pistons are the same and the bearings are the same, all bearings in the crank case are the same and the ones in the pistons are as well. They looked brand new so I didn't see any reason in replacing anything except the rings. Pistons looked flawless as well. I'm replacing timing chain and guide and oil pump guide and sprockets. New rings, new genuine head gasket l, new rings, new turbo gaskets and o rings, several new hoses. Several more new things.
@@bimmer.doctor New elring head bolts, new valve stem seals are freshly installed, new hub bolt and rod bearing bolts, this thing hopefully will last her a minute when I'm done. Your videos have been awesome in the crucial steps along the way.
@@bimmer.doctor One question that I'm sure you know the answer to and I can't seem to find anywhere other than people guessing is...what are the torque on the motor mount brackets that bolt to the side of the block? Thanks in advance sir
can you tell us where did you got the koblenschmith rod bearings?
Couldn't find them in stock at any suppliers, so I ended up ordering from someone in Poland through eBay
thanks that is good to know
9:51 torque spec, 5nm,20nm then 90 degree and then 90 degree again right? Just making sure I’m understanding correctly.
Exactly!
Did you reuse the old head bolts?
Never!
I've run into an issue here. I have noticed there are 10 17mm bed plate bolts in the center obviously but 5 of the bolts are a little shorter than the other 5 larger ones. Could you pls help with the correct orientation on those before I go literally insane here ?
Just got the new ones and was going to run my clearances and noticed 5 are larger. Figured you'd know before anybody exactly where the 5 shorter and 5 larger bed plate center 17mm bolts go in the correct places.
The main 10 bed plate bolts should be the same! P/N 11117589711 The perimeter bolts have 4 longer ones as I mentioned in the video. Maybe they gave you the wrong parts?
They gave me the correct ones because I compared them to the old ones that I took out of the car. So there are 5 shorter ones, so that leaves one longer one left over but I don't guess it matters if I put 4 longer ones on the ends. Hmm kind of weird
There's 10 total as you know. Not trying to confuse you. Yes 5 are a bit longer than the other 5 a bit smaller ones. Really strange set up considering there's 10 and 5 shorter ones are the same size and there are 5 larger ones the same size. I'm completely lost one this one lmao
@BamaTony73 Well now i’m definitely confused LOL! There’s 10 17mm bolts, which are all the same length, same part number I gave you before. Seen at 9:31 in the video. Are you talking about those?
Такие же поршня стоят nural. Уже 3й год
It’s real shame about those pistons. Shows how build can get significantly more expensive unexpectedly. Imagine working on customer car/ engine, and all of hard works pay has to go in unexpected expenses and mechanic doesn’t get nothing.
Excelente trabajo amigo bellooooo
Hello
Pity you didn’t clean the outside of the nether block
Hi @bimmer.doctor thank you for these great videos, it’s helps a lot. Where can I order the the head gasket and seal kit (el ring). I’m looking the kit like you show here.
Hi there, the seal kit is Elring 522190, the head gasket is Elring 364525
@@bimmer.doctor Thank you so much for the info.
@@bimmer.doctor Thank you so much for the info.