My 180k e39 decided this weekend was a nice time to destroy its rod bearings. Confirmed by the metal flakes in the oil and removed the bottom of the motor. Crank was not damaged. Can anyone give advice on if I should try to have the motor rebuilt or just go with a new one? My mechanic is quoting around $10k all-in for a new motor, including replacing the bearings on it. To replace the current bearings and VANOS, I'm looking at more like $5k, but he's warning me about potential issues down the line. Just a little unsure of going straight to a new motor.