I want to do a full engine rebuild. Reasons are:
- Rest of the car incl. gearbox has been done
- Car will be resprayed completely. Removing the engine also allows me to recondition the engine bay

The car has an M60B30 engine. I have a spare engine so I can keep driving untill its done.

A friend of mine totalled his E39 540/6 and bought a cheap 535 to put the 540/6 driveline in. I can get that M62 3.5 cheap. Its a vanos engine.

The M60B30 and M62B35 share the same bore, only the stroke differs. I am thinking of dropping in the M62 crankshaft, conrods and perhaps pistons too (or reworked pistons if needed). I would be using all other parts from the B30 to keep everything easy.

In short, you would get an M60B35 with 84 x 78.9 running on M60B30 heads. If this is all direct fit stuff, I will put the engine in the car at the end of the year and go for a custom exhaust system. After that, I'll let a specialist do a full remap on the engine.

Question: Will I be able to drop in the shaft + conrods?

Second part will be the air intake system. I will have all M60B30 parts, M62B35 parts and I also have all M60B40 parts. So, starting at the airbox, what combination do I want to use?

Airbox + MAF + Hose + throttlebody: M60B30, M62B35 or M60B40 parts.
Note: Can't use 3.5 throttle body as its electric

Intake manifold: M60B30, M62B35 or M60B40.


And no, I won't go for a B40 swap. That would also mean I have to put in the 5HP30 gearbox (which I would then want to rebuild). A 4.0 block has value due to its high "E30 project" potential. Doing a "M60B35" build would cost me up to 1.000 euros. Doing a 4.0+5HP30 swap would go to 3.000.

I do not worry about the 5HP18 gearbox. I will handle that torque. Reason for that is that it can take 310Nm and that was based on the earlier model with 3 or 4 clutches. My 5HP18 model already has the higher line pressure and 4 to 5 clutches.

If you guys have any knowledge on this, let me know. I will be stripping the B30 soon so pics will follow.