Engine, transmission, and drivetrain discussion
The B47 replaced the N47 in 2014. Key differences: N47: Timing chain at the BACK (terrible design) Chain failure is common and expensive Good power and torque Cheap to buy now…
2 months ago
Both are legendary BMW inline 6 engines but which one is more reliable long term? M54 (E46/E39/E60): Simpler design No Valvetronic Known for oil leaks but mechanically…
2 months ago
The BMW N63 is a 4.4L twin-turbo V8 used in the 550i, 650i, 750i, X5 50i, and X6 50i. It is called the hot-V because the turbos sit inside the V of the engine — great for…
The N47 timing chain issue is well documented but heres a prevention guide: Listen for chain rattle on cold start (early warning sign) Change oil every 10k km max (not BMWs 30k…
3 months ago
The S58 in the G80 M3 and G82 M4 is basically a tuned B58 with different turbos and internals. But are there any reliability concerns emerging? Ive heard about: Crank hub issues…
3 months ago
The S65 V8 in the E90/E92/E93 M3 is one of the greatest engines BMW ever built — 8300rpm redline, 414hp, and a sound that rivals Ferrari. But it has one critical weakness: rod…
3 months ago
VANOS (Variable Nockenwellensteuerung) is BMW variable valve timing system used on every BMW engine since 1992. Here is a complete guide. HOW VANOS WORKS: VANOS adjusts the…
3 months ago
The N54 twin-turbo inline-6 is one of the best tuning engines BMW ever made, but it has a reputation for reliability issues. After owning three N54 cars and helping dozens of…
The eternal debate. N54 vs N55 for tuning. Heres my take after owning both: N54 pros: Twin turbo, more headroom Can make 600hp+ on stock block Huge aftermarket support N54 cons…
4 months ago
Hot take: the B58 is the best engine BMW has ever made. Better than the S54, S65, or any M engine. Why: Makes 380hp stock in some applications Can easily do 500hp+ with bolt-ons…
4 months ago
