Are there any disadvantages to not using the engine cover?
The engine cover is there for several reasons:
- Appearance: Most people don't know what engines are, so when they pop the hood and all they see is a cool piece of plastic, they like it. That doesn't count you and me, but the thousands of others who don't care about cars. Oh, and it gives them a nice spot for a logo!
- Sound: Engine covers do help block out some sound from the engine. On direct injection engines, the injectors tick. People assume ticks are bad. They like to minimize that noise and noise in general, even if it's only a little.
- Cleanliness: You could argue the cover may help with cleanliness of the surface. Assuming if you pop the hood and your cover is dirty, whatever's under it may not be. But, I've yet to pop off an engine cover that was really dirty to find a clean engine below and I've seen some real dirty stuff in my day!
- Heat: Some engines (like the 4.0 TFSI) have twin turbos in the center of the V, directly below the engine cover. They also have metal heat shields under the engine cover to help protect the hood. That's a pretty big exception to the rule and doesn't apply to the 2.0 TSI.
I'm sure there are other examples, but anyways, you may enjoy this. The FSI found in MK5 GTI and MK6 Golf R (and a ton of other cars), has various engine covers from big to small. The smallest isn't exactly what would call an engine cover.
Little engine cover (if you can even call it an engine cover!)
Bigger engine cover:
Way bigger engine cover:
If you want to see a comical engine cover in terms of tinyness, look at various versions of the 1.2 TSI in the Audi, Skoda and VW.