|
|
|
|
 |
 
|
 |
BMW Garage | BMW Meets | Register | Today's Posts | Search |
 |
|
BMW 3-Series (E90 E92) Forum
>
DIY - How To Rebuild Your E9X N52 Engine In Your Garage
|
 |
| 02-16-2021, 03:52 PM | #1 |
|
Enlisted Member
 51
Rep 37
Posts |
DIY - How To Rebuild Your E9X N52 Engine In Your Garage
My BMW 325i E90 with the n52b25 engine was burning oil at about 1L/1000kms all the way down to 1L/300kms over the last few years. I tried everything to fix it (new CCV, seafoam piston soak, liqui moly oil stop, engine flushes etc) Nothing worked, so I bought a wrecked/burnt donor engine sight unseen off EBay to take my time rebuilding before swapping it out with the one in my car.
I am already done the rebuild/swap and will release a few videos every week as they are edited. I wanted everything completed so I could show you everything that went well and what went wrong so you can learn from my mistakes. It will save you a ton of time and $$$ hopefully. Prequel: If your n52 is burning oil I suggest you start here and try a few things first: (Almost) all the parts and tools you need for the rebuild: I've added links to the tools you can view HERE: https://bmw-repairs.com/essential-to...tric-precision Engine rebuild process starts here: I am calculating how much this cost to do... but will make a complete video about that in the future. Feel free to ask my questions on IG or FB https://www.instagram.com/buildanddrive_/ https://www.facebook.com/BuildandDrive9 Last edited by BuildAndDrive; 04-07-2024 at 05:21 PM.. Reason: added updated tools description |
| 02-17-2021, 09:43 AM | #2 |
|
Enlisted Member
51
Rep 37
Posts |
Here are the next videos:
Tearing Down The N52 Engine How To Remove the N52 Cylinder Head |
|
Appreciate
4
|
| 02-17-2021, 11:29 AM | #3 |
|
Private First Class
 
30
Rep 123
Posts |
Cool, I look forward to watching the vids.
If your engine was burning so much oil, are you planning to service or replace the Catalytic Converters?
__________________
BMW Owner since 04/2018
|
|
Appreciate
0
|
| 02-18-2021, 04:51 AM | #4 |
|
Enlisted Member
51
Rep 37
Posts |
Its a good question! I took a look in the cats when I had the engine out and they seems fine. The honeycomb was not clogged or blocked up. But it may also be because the owner before me had replaced them. I soaked them with hot water and dish soap, but I don't think it did anything tbh... they were fine.
|
|
Appreciate
0
|
| 02-18-2021, 08:44 AM | #5 |
|
Lieutenant General
 
4542
Rep 11,903
Posts |
amazing.... great work dude
 |
|
Appreciate
0
|
| 02-18-2021, 09:27 AM | #6 | |
|
Private First Class
30
Rep 123
Posts |
Quote:
__________________
BMW Owner since 04/2018
|
|
|
Appreciate
0
|
| 02-19-2021, 12:30 PM | #7 | |
|
Enlisted Member
51
Rep 37
Posts |
Quote:
|
|
|
Appreciate
0
|
| 02-19-2021, 12:31 PM | #8 |
|
Enlisted Member
51
Rep 37
Posts |
Here is the next video where we find out everything that was wrong with the engine.
|
|
Appreciate
1
IllSic_Design2122.50 |
| 02-23-2021, 12:27 PM | #9 |
|
Enlisted Member
51
Rep 37
Posts |
Next video: We get the oil pump off and check out the connecting rod bearings
|
|
Appreciate
1
IllSic_Design2122.50 |
| 03-02-2021, 01:53 PM | #10 |
|
Enlisted Member
51
Rep 37
Posts |
Next Video: Checking the piston rings if they were out of spec... this is the real reason why the n52 burns so much oil or has bad oil consumption.
Last edited by BuildAndDrive; 03-14-2021 at 03:31 PM.. |
|
Appreciate
1
IllSic_Design2122.50 |
| 03-09-2021, 02:58 PM | #11 |
|
Enlisted Member
51
Rep 37
Posts |
How To Bore an N52 Block
In this video we dingleberry hone the n52 engine block and clean the surfaces.
|
|
Appreciate
1
IllSic_Design2122.50 |
| 03-28-2021, 03:39 PM | #12 |
|
Enlisted Member
51
Rep 37
Posts |
How To Measure Piston Ring Gap And Assemble Pistons
How To Measure Piston Ring Gap And Put Them On The Pistons
|
|
Appreciate
1
IllSic_Design2122.50 |
| 03-31-2021, 04:03 PM | #13 |
|
Enlisted Member
51
Rep 37
Posts |
Installing The Pistons Into The Block
How to use a ring compressor to install the pistons into the n52 cylinder block
|
|
Appreciate
1
IllSic_Design2122.50 |
| 04-07-2021, 05:32 AM | #14 |
|
Enlisted Member
51
Rep 37
Posts |
How To Replace The Valve Stem Seals On An N52 engine
We take apart the exhaust side of the cylinder head, remove the exhaust camshaft bearing ledge and replace all valve stem seals on the n52 engine.
|
|
Appreciate
1
IllSic_Design2122.50 |
| 04-18-2021, 10:09 AM | #15 |
|
Enlisted Member
51
Rep 37
Posts |
The next part of the n52 rebuild is to clean and lap the valves.
|
|
Appreciate
2
E92_William1306.00 IllSic_Design2122.50 |
| 04-25-2021, 04:24 AM | #17 |
|
Enlisted Member
51
Rep 37
Posts |
I didn't replace the main bearings as the conrod bearings looked well within spec. I suspect the engine was rebuilt as some point. Just new rings and valve stem seals/gaskets etc.
Last edited by BuildAndDrive; 04-25-2021 at 04:38 AM.. |
|
Appreciate
0
|
| 04-25-2021, 04:26 AM | #18 |
|
Enlisted Member
51
Rep 37
Posts |
The next video we remove the valvetronic springs and intermediate rockers with basic tools in order to get the intake camshaft out.
|
|
Appreciate
1
IllSic_Design2122.50 |
| 05-04-2021, 01:06 PM | #20 |
|
Enlisted Member
51
Rep 37
Posts |
Reassembly of the N52 cylinder head
|
|
Appreciate
1
IllSic_Design2122.50 |
| 05-13-2021, 03:14 PM | #21 |
|
Enlisted Member
51
Rep 37
Posts |
BMW N52 Cylinder Head Re-assembly
BMW N52 Cylinder Head Re-assembly
In this video we take apart the exhaust camshaft and replace the valve stems seals on the n52 engine. |
|
Appreciate
1
IllSic_Design2122.50 |
| 05-22-2021, 04:59 PM | #22 |
|
Enlisted Member
51
Rep 37
Posts |
How To Install The Cylinder Head On An N52 Engine - New Head Gasket & Correct Torque Sequence
|
|
Appreciate
1
CornerGorillaPit238.50 |
 |
| Bookmarks |
|
|
