My BMW 635 CSi Had A Hidden Secret (Unfinished Engine Swap)

Today on Manual Theory, we do a deep dive "Expectation vs. Reality" on my newly acquired, "M30B35-swapped" BMW E24 635CSi. After cleaning it up and living with it for a few weeks, I’m walking you through the good, the bad, and the confusing.

The listing promised a fully swapped M30B35 engine, but after digging into the engine bay - and digging through a mysterious box of parts found in the trunk - I realized the previous owner stopped 80% of the way through.

In this video:

Exterior Walkaround: The paint looks incredible, but the "new" tires were a bit of a stretch.

Interior Review: Evaluating the classic BMW Sport Seats (and their cracks), the broken blower motor switch, and the "flappy" shifter feel.

The Engine Bay: Investigating the M30B35 swap claims.

The Twist: Validating the cylinder head numbers vs. the crank pulley and finding the "smoking gun" in the trunk that proves this car is still running Motronic 1.0.

Now the question is: Do I finish the swap to Motronic 1.3 to unlock the full potential of this M30B35? Let me know what you think in the comments?

Timestamps:
0:00 Intro & Exterior Walkaround
1:57 The "New" Tires
2:38: Big Bumpers
4:14 Interior: Sport Seats & Cracks
6:45 Dashboard & Electronics Quirks
9:21 Broken AC/Heater Switch
10:17 Shifter Feel & Cup Holders
12:18 Under the Hood: The B35 Investigation
13:16 Motronic 1.0 vs 1.3 Explained
15:33 What I Found in the Trunk (The Proof)
17:18 Next Steps for the E24

#BMW #E24 #635CSi #ProjectCar #ClassicBMW #ManualTheory #M30B35