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Old 01-22-2015, 10:03 PM
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Whats the deal with the JK front end Diaper ??

Hey guys
So got my first JK
Know that big bulging plastic thing under the front in...
Whats it for and what happens if you take it off
Can I see some pics with it on vrse off


thanks
Just wanted to know

P Scott

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Old 01-22-2015, 10:07 PM   #2
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it's to keep 3 year old and younger jeeps from poopin all over. once you potty train them and they get their big boy tires you can take them off....

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Old 01-22-2015, 10:13 PM   #3
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I ripped mine off going through a mud hole
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Old 01-22-2015, 10:13 PM   #4
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It's the factory skid plate. Yes it's a joke. I ripped mine off the first time off road.
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Old 01-22-2015, 10:16 PM   #5
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it's an air dam, not a skid plate. it reduces drag under the jeep while driving, supposed to help mpg and all that crap.

if you remove it you'll get a little hood flutter at high speeds but nothing else is gonna happen. you pretty much take them off for any lift or tire upgrade anyway....
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Old 01-22-2015, 10:35 PM   #6
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Quote:
Originally Posted by michael450f View Post
i ripped mine off going through a mud hole
+2
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Old 01-23-2015, 12:28 AM   #8
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8/10 people remove it when lifting the jeep.
Yeah, because I heard if I didn't my jk's bottom would get chaffed.
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Old 01-23-2015, 08:45 AM   #9
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It's the factory skid plate. Yes it's a joke. I ripped mine off the first time off road.
+1, ripped it off first time off road
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Old 01-23-2015, 11:47 AM   #10
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Took mine off after about a month. No adverse effect on MPG's as far as I can tell....
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Old 01-23-2015, 01:44 PM   #11
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It's to improve a gas mileage. I took mine off and my mileage went from 6 mpg to 3.
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Old 01-23-2015, 01:50 PM   #12
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It's to improve a gas mileage. I took mine off and my mileage went from 6 mpg to 3.


LOL!!!
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Old 01-23-2015, 02:25 PM   #13
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I removed mine the day we picked up the JK.
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Old 01-23-2015, 02:42 PM   #14
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It's useless. Chrysler put it there to squeeze out a fraction of a mpg. Only downside I noticed was increased hood flutter which was counteracted by removing the hood spring.
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Old 01-23-2015, 04:25 PM   #15
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I thought it was for pushing water down away from the engine (when you go through water).
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Old 01-23-2015, 04:38 PM   #16
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I thought it was for pushing water down away from the engine (when you go through water).
It's for aerodynamics to go along with the "rake". Without it you might get hood flutter, you might not. A front metal skid plate is a better alternative. If it's removed and there's hood flutter the hood spring can be removed or aftermarket hold downs can be used.
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Old 01-23-2015, 09:05 PM   #17
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I removed mine as well. I have not had any hood flutter but that may be due to its new. Either way going with different hold downs anyways.
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Old 02-11-2015, 07:00 PM   #18
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Have had plenty of hood flutter--severe--in highway areas when there is high wind, but that is b/c of OEM hood latches.

Replace hood latches and you remove the problem, regardless of air dam.

The air dam actually does divert water.
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Old 02-11-2015, 07:09 PM   #19
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there's a reason it's called an air dam....
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Old 02-11-2015, 07:23 PM   #20
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519 posts and now you are asking???? 4 years + as a member and now you are asking????
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Old 02-11-2015, 07:28 PM   #21
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Originally Posted by kjeeper10 View Post
8/10 people remove it when lifting the jeep.
Lol! And the other two actuallygo offroading and tear it off on the first obstacle!
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Old 02-11-2015, 07:42 PM   #22
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Bought my rig back in Nov and hadn't experienced any hood flutter at all and averaged 18 mpg in city driving. Decided to take mine off a few weeks ago when I seen your post.

Went a few miles down the street to pick my kid up from work and jumped on the highway and thought my hood was going to fly off. Checked my mpg and it had dropped to 16.1. Kept it off for about a week and decided to put it back on.

Hood fluttering is gone and mileage has went back up to 17.5 to 18.1. YMMV, but that was my experience.
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Old 02-11-2015, 07:43 PM   #23
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and that would be the reason it's called an air dam.....
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Old 02-11-2015, 07:46 PM   #24
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it's an air dam, not a skid plate. it reduces drag under the jeep while driving, supposed to help mpg and all that crap.

if you remove it you'll get a little hood flutter at high speeds but nothing else is gonna happen. you pretty much take them off for any lift or tire upgrade anyway....
What he says! It is held on by plastic pop rivets take it off. If you don't like it off put it back on.
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Old 02-11-2015, 08:10 PM   #25
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Tore mine off while plowing through a crowd of vegan, PETA, moms demand action against men rallyers. Solved the hood flutter by mounting a M2 .50BMG to the hood.

I've never bothered to calculate MPG. Needle is on "F" I drive. Needle is on "E" I get gas.
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Old 02-11-2015, 09:36 PM   #26
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Originally Posted by OkieJK View Post
Bought my rig back in Nov and hadn't experienced any hood flutter at all and averaged 18 mpg in city driving. Decided to take mine off a few weeks ago when I seen your post.

Went a few miles down the street to pick my kid up from work and jumped on the highway and thought my hood was going to fly off. Checked my mpg and it had dropped to 16.1. Kept it off for about a week and decided to put it back on.

Hood fluttering is gone and mileage has went back up to 17.5 to 18.1. YMMV, but that was my experience.
Imagine that, the factory actually put it on there for a reason. As KJeeper said 80% of lifted jeep owners remove it and then about half of them are complaining about gas mileage. In reality they should be adding a larger air dam ... ground effects maybe ...

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