Quote Originally Posted by rar110 View Post
Yes, particularly manifolds, filter housings and coolant components that all heat up and cool down.
I think these sort of things have been around long enough that they’re known not to be an issue. The M57 in my old L322 is a 2002 mode with close to 300KKM on it now and those components have never had an issue. The current owner still says the engine has never missed a beat.

You’d never own a new vehicle these days if you thought plastic wasn’t up to the job.