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Unread 11-05-2012, 12:33 AM   #1
Arsenalman007
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2013 JK Rubicon burning smell??

Hey guys, I'm no mechanic or engineer or even remotely good with automobiles, though it's something I'd like to get into, especially with a brand new Rubicon.

But anyways, I've taken it into mud/muddy water several times now (to where there is mud residue underneath the hood [everything looks like it's well sealed]), and when I was driving on the highway, I noticed a burning smell that persisted until I turned on the AC. The smell cleared immediately afterwards, and although I turned the AC off, the smell did not return. I was also driving down a (relatively) steep grade and following a semi - perhaps the smell came from it.

And, to top it all off, I had taken it into 4WD at speeds of 45 mph the day before until I started to smell something ELSE burning (I was told that it was from the heating of the oil or the heating of gears). Yes, this is my first 4WD capable vehicle, and yes, I was told by the dealer to use 4WD in speeds no higher than 45. So please, feel free to flame or laugh. As long as you can explain what was wrong!

So: Why was I smelling something while driving on the highway? I was in Cruise at 77 mph, (obviously) not in 4WD, all the gauges were reading correct, gas mileage did not suffer, driving down a 7% grade slope, and in a brand-new rig.

Thanks for schooling me in the ways of jeeps

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Unread 11-05-2012, 12:52 AM   #2
Coolcatracing
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Check for leaks, if you don't find any don't worry about it. If you do then take it to the dealer, they should be your first stop, you paid for the warranty so you might as well use it.
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Unread 11-05-2012, 02:12 AM   #3
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Following a semi on a steep downgrade you most likely smelled his brakes. Itís very common for semis to do that.

Also common is that new Jeeps will tend to smell like something is burning from the oils on the exhaust system. Some Jeeps take longer than others to burn it off. Just how new is your Jeep?
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Unread 11-05-2012, 08:04 AM   #4
paul84043
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New Catalytic converters STINK when they get hot for the first month or so, plus you have all kind of oils and what not on the engine surfaces.
It's good that you're aware of it, but it's most likely completely normal...
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Unread 11-05-2012, 08:44 AM   #5
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Arsenalman007 - first of all, thanks for your purchase. All the above explanations are plausible.
If in doubt, contact your dealer.
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Unread 11-05-2012, 09:28 AM   #6
brianjw
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Sounds pretty normal for a new vehicle. Breaking in gears, catalytic converters, burning off new paint, etc etc. If a visual inspection turns up with no leaks I wouldn't worry about it personally.
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Unread 11-05-2012, 05:22 PM   #7
farmer-dave1
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I occasionally get a burning smell on mine, and I've recognized it's a good time to either wash or blow out the underside of my jeep. Real easy to catch some weeds, grass and dirt that collect around the exhaust/ catalytic area. Might not hurt to take a hose to it.
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Unread 11-06-2012, 11:49 AM   #8
PhatJK
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Quote:
Originally Posted by Arsenalman007 View Post
...

But anyways, I've taken it into mud/muddy water several times now (to where there is mud residue underneath the hood [everything looks like it's well sealed]), ...
This is why I hate getting into mud. It sticks inside the JK underbelly and takes forever to wash clean. When dried, the caked mud behaves like sandpaper and plays havoc on the running gear and drive-train.
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Unread 11-06-2012, 12:52 PM   #9
robplumm
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As said...normal. It'll go away after the "new" wears off.
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Unread 11-06-2012, 01:56 PM   #10
Arsenalman007
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Quote:
Originally Posted by PhatJK View Post
This is why I hate getting into mud. It sticks inside the JK underbelly and takes forever to wash clean. When dried, the caked mud behaves like sandpaper and plays havoc on the running gear and drive-train.
oh. ohhh. this I did not know! hmmmm. what's the most effective way to clean its underbelly? just a hose?
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Unread 11-06-2012, 02:13 PM   #11
paul84043
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Quote:
Originally Posted by Arsenalman007 View Post
oh. ohhh. this I did not know! hmmmm. what's the most effective way to clean its underbelly? just a hose?
Well here in Utah with our evil mud I have to clean mine in several sessions as its nearly impossible to get it all off the first time...
Just take a hose or car wash sprayer to it.....
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Unread 11-06-2012, 08:02 PM   #12
Doctor7474
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Quote:
Originally Posted by Arsenalman007 View Post
oh. ohhh. this I did not know! hmmmm. what's the most effective way to clean its underbelly? just a hose?
Park Jeep in front yard and stick a sled style water sprinkler under it.
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Unread 11-06-2012, 08:14 PM   #13
brianjw
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Pressure washers are nice, but I've used a sprinkler underneath several times too.
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Unread 11-06-2012, 08:38 PM   #14
Arsenalman007
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Quote:
Originally Posted by Doctor7474 View Post
Park Jeep in front yard and stick a sled style water sprinkler under it.
lol, I like it. Nice and simple, yet elegant.
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Unread 11-07-2012, 09:44 AM   #15
PhatJK
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Quote:
Originally Posted by Arsenalman007 View Post
oh. ohhh. this I did not know! hmmmm. what's the most effective way to clean its underbelly? just a hose?
I usually go to the car booth washing place and use its high pressure washer to get most the mud off. Bring a lot of quaters. In some place you get into trouble with the owners because the mud clog up their drainage. Concentrate on the engine, transmission, and driveline area.

Then just slowly spray off the remaining mud that got stuck is various crevices when you do your normal car washing at home.
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