Why the Plastic Over the Engine

TomBlue

Member
I just purchased an FX 35 about a month ago. It replaced a Lexus RX300 and a Porsche Boxster S. It's a great blend of the two and I love it. The only complaint (if you can call it that) and it's with most vehicles these days is the huge plastic cover over the engine. Why do most car manufactures have a piece of plastic over their engines? Am I suppose to open my hood and marvel at the vast expanse of plastic? Wow, all that plastic is really awesome. Why not just leave the plastic off and let the engine run cooler? Like I say it's just my only complaint, a great SUV and a fun to drive. Does anyone know if there's a reason for this?
 
Aesthetics, no function other than trying to beautify the engine compartment
 
i'm going to take mine off and spray paint the upper plenum Krylon Copper for the heck of it...:sluggish::alien::stupido:
 
WOW people just find the smallest things to complain about.

This is exactly why consumer reports for vehicles are not correct and exact, cause people complain about every little thing they can think of.

If there was no plastic engine cover, then people would be complaining about it not having one.
 
WOW people just find the smallest things to complain about.

This is exactly why consumer reports for vehicles are not correct and exact, cause people complain about every little thing they can think of.

If there was no plastic engine cover, then people would be complaining about it not having one.
If they aren't complaining about the cars they're complaining about the posts.
 
If they aren't complaining about the cars they're complaining about the posts.

HAHA!!!! +1

People rippin for no reason.

Engine cover can be removed but the plenum is pretty raw. Most of us tend to paint, coat or polish it for looks. The cover serves no demonstrated purpose (I have never seen dyno proof) other than aesthetics.

Once the engine cover is gone, there are some visible hoses and wires. That's why you see some aftermarket options that expose the plenum, but cover the crank case and wires.

///7571
 
Thanks

HAHA!!!! +1

People rippin for no reason.

Engine cover can be removed but the plenum is pretty raw. Most of us tend to paint, coat or polish it for looks. The cover serves no demonstrated purpose (I have never seen dyno proof) other than aesthetics.

Once the engine cover is gone, there are some visible hoses and wires. That's why you see some aftermarket options that expose the plenum, but cover the crank case and wires.


Thanks, I took mine off this morning and the painting option seems like a good way to go. I'm not complaining just wondering why they are on most cars. Didn't know if there was a reason or just for aesthetics. I have a Stillen cold air intake and Z tube on order and after that's installed will move on to addressing the looks.
 
As long as you are doing the CAI - go for the plenum spacer. IMO the best bang for the buck mod.
 
I think, to the average Joe, the engine cover serves two purposes.
First it makes the engine bay look "cleaner" by covering all the parts that can gather dust, oil, etc... Lots of potential car buyers feel the need to look under the hood even when they haven't the slightest idea what is is they are seeing under there. The cover just looks "better" to most people, my wife included. It is a barrier between the reality that there is one hell of a complex piece of technology under that hood. It can also be wiped clean way easier than detailing the block itself.
Second, the engine cover makes the dealership money. Here's how: Say a guy has a fairly limited mechanical inclination, few tools, and a small amount of experience under the hood of any car, but is very willing to try his hand at DIY car maintenance. Say this guy buys an FX used and is glancing through his maintenance schedule one day when he notices it's time to change his spark plugs. He remembers doing this a few years ago with his last car and decides to give it a go. He pops the hood and BAM, engine cover. :eek: He can't even tell where the spark plugs are, let alone deduce whether or not he is up to the task. With a sigh, he decides to close up the hood and schedule an appointment with the dealer.
I've seen that happen first hand with a friend of mine, though not with an FX. I tried to explain to him how easy it is to remove the cover but the mere thought of what may have been under the cover ("all the wires and hoses") was enough to dissuade him from even trying. Dealer - 1, DIY - 0. All thanks to a big ass piece of plastic bolted to the motor. :frown:
 
^ Interesting theory on the dealership "fear factor". One more thing to have to remove and for the regular Joe its easier to walk away.....The cover was one of the first things I removed, really hate not being able to see what's going on under there.
 
Back
Top