Engine Rust on Brand New 2015 Suburban Engine

[BostonDad]

I just bought a 2015 Suburban and have driven it less than 40 miles (delivered with 191 miles). Noticed that the engine made a slightly less smooth sound than I thought it should (with the hood closed), so I looked under the hood and saw some rust around the engine. It's probably not what's causing the sound (if the sound even is bad--not sure if it is).

I was wondering if, based on the pictures posted with this thread, I have anything to worry about with a brand new 'burban being delivered with rust on the engine.

Any informed feedback would be most appreciated to allay my fears.

 

[zora]

thats normal, it's the exhaust manifolds they get extremely hot and will develope a surface coating only since they arent painted

 

[VanGo]

Yep, they are cast iron. If you stare long enough you can see them oxidize.
Most brake rotors will develop oxidation just sitting overnight if it's damp or humid.