DIY - How To Rebuild Your E9X N52 Engine In Your Garage

[BuildAndDrive]

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 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.

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

Prequel: If your n52 is burning oil I suggest you start here and try a few things first:
https://youtu.be/-tJ7utqWZQY


(Almost) all the parts and tools you need for the rebuild:
https://youtu.be/vPv6bWl6Cjo

Most of the Basic Tools You Will Need:
https://bmw-repairs.com/essential-to...tric-precision


Engine rebuild process starts here:
https://youtu.be/c_ZRdBV6A58

[BuildAndDrive]

The Next set of videos are here. Hope they can help you with your n52.

DIY N52 Engine Tear Down Here: https://youtu.be/9FXPtvtEfHM

DIY How To Remove The N52 Cylinder Head: https://youtu.be/5-DxCAmuNsA

[BuildAndDrive]

Next Video: We find out exactly why these n52b25 engines burn oil... the piston rings are well beyond spec after 100,000kms!

https://youtu.be/xOfYVfCijsQ

[BuildAndDrive]

Next video we hone the block with a flex hone (dingleberry hone)

https://youtu.be/1s68Ssb29C0

[BuildAndDrive]

How To Measure Piston Ring Gap And Assemble The Pistons

https://youtu.be/FHOHIt18Rb8

[BuildAndDrive]

How to use a ring compressor to install the pistons into the n52 cylinder block
https://youtu.be/bNOzkLfSb1s

[BuildAndDrive]

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.


https://youtu.be/JvpBUUCmW-A

[BuildAndDrive]

The next part of the rebuild is to clean and lap the valves

https://youtu.be/PsVNQ4zq6Ag

[BuildAndDrive]

The next video we remove the valvetronic springs and intermediate rockers with basic tools in order to get the intake camshaft out.


https://www.youtube.com/watch?v=LQ22zKEXfPo

[BuildAndDrive]

Reassembly of the n52 cylinder head

https://youtu.be/BqEMRnSvwN8

[BuildAndDrive]

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.


https://youtu.be/7aM58pxXrv4

[BuildAndDrive]

How To Install The Cylinder Head On An N52 Engine - New Head Gasket & Correct Torque Sequence


https://youtu.be/52FZT6jeDzI

[BuildAndDrive]

Correct N52 Timing Procedure and Vanos Re-assembly


https://bmw-repairs.com/correct-timing-procedure-for-an-bmw-n52-engine

[grosseman]

Wow, awesome to see this sharing of knowledge! I sure hope I will never have to do this but if I do, I know where to look :P

[BuildAndDrive]

If you are interested in learning how to remove an n52 engine on a bmw e90, watch here:

https://youtu.be/1FNF_jCqvx0