How To Replace A BMW Engine | Start To Finish

How To Replace A BMW Engine | Start To Finish

This is the complete engine replacement from my 2008 BMW E90 335i… from the very first bolt to the final installation.

What started as a catastrophic N54 engine failure turned into the biggest project I’ve ever tackled on this channel. Instead of pulling the engine out from the top like most people do, I removed the entire drivetrain from underneath using a hydraulic lift table—engine, transmission, and front subframe all at once.

Over the course of this project, I document every major step of replacing a BMW N54 engine, including drivetrain removal, engine teardown, transferring reusable components, installing brand new OE Mitsubishi turbochargers, replacing the rear main seal, verifying engine timing, refreshing Index 12 injectors with new Teflon seals, replacing the valve cover gasket, installing the water pump and thermostat, repairing the engine wiring harness, assembling the drivetrain, and finally reinstalling everything back into the car.

This isn’t a highlight reel or a time-lapse. It’s the complete process—including the setbacks, specialty tools, torque procedures, and countless small details that most videos leave out.

Whether you’re replacing your own BMW engine, tackling an N54 project, or just enjoy watching massive automotive repairs, I hope this video helps you along the way.

If you enjoy the video, consider subscribing and let me know what project you’d like to see next!

BMW E46 GIVEAWAY SERIES PLAYLIST!!!
https://www.youtube.com/playlist?list=PLcaHMEb8LJ8aSth9OfbHWTSrO89dLaqj7

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DAY OFF DIY Discord Link!
https://discord.gg/2XHfgmMpSU

TOOLS USED

Fluid Extractor
https://amzn.to/4nkR081

Hydraulic Lift Table
https://amzn.to/4nhjgrY

Articulating Borescope
https://amzn.to/42C9eIH

Air Hammer Set
https://amzn.to/42YVUhu

3/8″ Digital Angle Torque Wrench
https://amzn.to/4wypisy

1/2″ Torque Wrench
https://amzn.to/4vfDUvg

3/8″ Angle Torque Wrench
https://amzn.to/3PzPrqq

1/4″ Torque Wrench
https://amzn.to/4vcMs69

Wobble E-Torx Socket Set
https://amzn.to/4uTbUxz

N-Series Injector Slide Hammer
https://amzn.to/4fvwZJM

N-Series Injector Remover & Seal Compression Sleeves
https://amzn.to/49sABsp

Bore Brush Kit
https://amzn.to/4dERwKX

CTA Tools N-Series Crank Seal Tool (Front & Rear)
https://amzn.to/43BpiKX

CTA Tools N-Series Timing Tool Kit
https://amzn.to/4u3o1qQ

1/4″ Ball Torx Socket Set
https://amzn.to/43Emi0o

CTA Tools Extra Long 10mm Valve Cover Socket
https://amzn.to/4dESczZ

Crush Washer Metric Assortment
https://amzn.to/4dVuU9a

Vehicle:
2008 BMW E90 335i

Engine:
BMW N54 Twin Turbo Inline-6

#BMW #335i #N54 #E90 #EngineReplacement #DIY #BMWRepair

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Comments

@16vPete says:

Awesome, awesome stuff as usual

@ski69 says:

Hey bro, quick tiip for cleaning…..to reallly clean the nasty grime off of engines or transmissions, use "Easy-Off Fume free" oven cleaner…..this thing will take everything off like new……great work man, just awesome work…

@danked6731 says:

This really is a god send my bro I love it. I just did about 2 a4 pages on n54 and I can’t figure out why the oil cooler line that’s going across the front of the engine on top is shaking. Did the OFHG Pulleys tensioner belt vanos solenoids and boost along with valve cover and gasket plugs and coils, I’m wondering did I torque the belt wrong or pinch the OFHG bit no leaks. I also thought a turbo was blown but the valve cover was leaking and the inlet popped off, you saved me on this one.

@N55_will1 says:

You already know I’m watching all of this movie!

@brxxzo says:

I love this video just off the start

@jayvalenciia says:

bro posting everything BUT that F30 introduction video

@harrisric128 says:

Amazing work. Not just the build, but the video quality and production are on point. I'm ready to buy it when you are ready to sell it !!!!

@RC-hd9ok says:

Just when I was thinking of taking on a N52 engine replacement project

@Plumbtired says:

"How to replace a BMW engine:
Contact Alec, Fly him out to you at your expense, pay him whatever he says because you know he will be fair, make sure you have all the tools he needs, then work for him from the neck down even if you know something about cars.

I would almost guarantee a complete swap in four days.

@Maintenanceman81 says:

What an outstanding production piece Alec ! Seriously you killed it, top to bottom. Like the fcp shirt brother, so glad things are falling in place, you of all people deserve it

@igor34265 says:

Good job, you're amazing!

@Recon77 says:

I learn so much from this channel. Ty sir

@Meyounbigfoot says:

Are you making a full video for the M54 engine? Or it is the same as the N54?

@KamD450 says:

My toxic trait is I think I can do this. I’m about to attempt this in my driveway……… today.

@albertalvarez5901 says:

The perfect movie for BMW enthusiasts.

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