Originally Posted by Flatlander665
Mrad01, do you have an update on the check valve fix? Did it remove the startup rattle for you?
I have the same startup rattle and it definitely seemed to be lack of oil to the upper part of the engine. If the engine has been stopped for several hours the noise will be present. If the engine has been recently ran, then a restart will not have the noise.
Do you have a photo of the check valve(s) and/or their location on the engine?
Yes, BMW Germany replaced my engine in the end with a nice shiny new 2011 S65. They changed the check valves and that didn't work. They tore down the engine and replaced the crank and bearings. Didn't work.
The new engine is great. Just running it in now....