Engine knock no codes

[Redlinedone]

I recently bought a 2002 Q45 beautiful car. Unfortunately it has a very loud engine knock. There are no codes stored. There is plenty of oil in the engine with no leaks. It is however in a limp state and has absolutely no power beyond 5-10 MPH I'm worried but I only paid $800 for the vehicle so I'm not as worried. I have a video of the noise if anyone can help.

[EdBwoy]

Yea, sadly you don't get any codes when you eat up your rod bearings. At first I assumed the knock sensors would only catch higher frequency pings from the head/block versus the semi-isolated crankshaft hardware but I just went on with life without solving that great mystery.

Due to the oil consumption habits of these engines, it's not too difficult to run the engine dry with a little neglect. Even when you top it off, the damage is done.

Here's my 06 M45: https://youtu.be/x-RxN5eMWQE

[elwesso]

Welcome to NICO!

Post up the video if you'd like, probably wouldn't hurt to verify, but like EdBwoy says the engine is likely toast. How many miles on the car?

[Q451990]

Hopefully the headlights are in good shape... you can get most of your investment back on eBay if you don't feel like replacing the engine.

[EdBwoy]

All true. Sadly, the F50s are fast approaching the point where a reasonable engine replacement almost exceeds the blue book value.

OP, if you will, update your profile or let us know where you are located and more specs/options on the car. Helps us help you with more location-relevant advice and options.