Major Engine Rebuild or Replace? '08 550i V8

[hhillmann]

I took my 550i in to get a misfire diagnosed and after a week, my mechanic came back and suggested that I essentially rebuild the top of the engine. Estimate attached. He also mentioned that I may be better off just replacing the engine with one with 25k less miles for a little more money.

Any advice or suggestions? I am obviously going to take it to another mechanic for a second opinion. Just feel like there may be an easier option, or my mechanic is missing something.
Rebuild.JPG

[BmwLoverNyc]

will take it to another mwchanic for sure

Sent from my SM-G935P using Tapatalk

[mandd]

Take it to a BMW specialty shop and have it checked again.

The eccentric shafts and intermediate levers do wear but this failure is more common on the 02-05 N62, the 550 motor N62TU usually does not suffer from this failure.
The VANOS adjustment units (Gear Sprocket) rarely ever fail, it is usually the VANOS solenoids.

Now this engine does suffer from failure of the upper timing chain guides and stretched chains (each bank has its own chain) which will jump time and cause a misfire with poor idle.

Mark.

I took my 550i in to get a misfire diagnosed and after a week, my mechanic came back and suggested that I essentially rebuild the top of the engine. Estimate attached. He also mentioned that I may be better off just replacing the engine with one with 25k less miles for a little more money.

Any advice or suggestions? I am obviously going to take it to another mechanic for a second opinion. Just feel like there may be an easier option, or my mechanic is missing something.
Rebuild.JPG