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Old 01-18-2014, 03:50 AM   #1
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rattling noise when accelaerating

I have a 2010 jeep wrangler unlimited and i noticed when first start accelerating it makes a rattling noise please help
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Old 01-18-2014, 06:43 AM   #2
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Check the welds on the exhaust crossover in front of the transmission #1

It can also be engine ping. Does it only do it before engine gets up to operating temp-or all the time ?
Try running a bottle of Techron in with a tank of gas every few months.

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Old 01-19-2014, 10:41 AM   #3
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I had the same problem that just started with my 2013.

It was actually a loose exhaust clamp between the cats and the mid muffler under the drivers door. I tightened it up and rattle is now gone.
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Old 01-20-2014, 05:39 AM   #4
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Quote:
Originally Posted by kjeeper10 View Post
Check the welds on the exhaust crossover in front of the transmission #1 It can also be engine ping. Does it only do it before engine gets up to operating temp-or all the time ? Try running a bottle of Techron in with a tank of gas every few months.
I also have a rattling noise on 2013 that only appears when the jeep is cold and disappears when gets to an oper. temp. It usually lasts 1-2min. I didn't have this in summer days. Any idea what to look for? Thanks
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Old 02-07-2014, 05:10 PM   #5
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ESA31 was in the right neighborhood. I just had the same problem with my 2014 JKU and it was a cross member that was interacting with the exhaust. The temperature dynamic appears to be a factor.....in cold weather, it does it more to me. It doesn't do it at all unless the engine has warmed up. And it usually only does it on acceleration from a dead stop or a slow speed....and does it more when i barely accelerate. Dealer mechanic listened to me start and stop it in the parking lot so he could narrow down the location and then it took him just 15 min to specifically locate and address the cross member. All fixed......
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Old 01-12-2015, 07:07 AM   #6
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This thread makes me wonder if this is the problem I'm having. I've assumed it's engine pinging, preignition, etc. I have a 2013 JK 2Dr Sport, Auto transmission.

My issues sounds more like rattling a chain under accelerating conditions. It happens more under a heavy acceleration (as in merging into traffic) but also have heard it under minor acceleration. The problem seems to occur in hot weather and when the engine is warmed up. I think it improves with 89 octane but does not eliminate it. I cannot make it occur on demand and the dealer cannot duplicate it to try and fix it.

I have tried Techron a few times, no difference.

If it is possible that a cross member is having some interference, is this something I can see and feel if I get under and move things or is the issue a very minor torque on a clamp, etc?

Thoughts/help?
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Old 01-13-2015, 07:59 PM   #7
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Pics of the area or the clamp would be helpful, can anyone do that?
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Old 01-13-2015, 09:17 PM   #8
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Quote:
Originally Posted by Max42 View Post
This thread makes me wonder if this is the problem I'm having. I've assumed it's engine pinging, preignition, etc. I have a 2013 JK 2Dr Sport, Auto transmission.

My issues sounds more like rattling a chain under accelerating conditions. It happens more under a heavy acceleration (as in merging into traffic) but also have heard it under minor acceleration. The problem seems to occur in hot weather and when the engine is warmed up. I think it improves with 89 octane but does not eliminate it. I cannot make it occur on demand and the dealer cannot duplicate it to try and fix it.

I have tried Techron a few times, no difference.

If it is possible that a cross member is having some interference, is this something I can see and feel if I get under and move things or is the issue a very minor torque on a clamp, etc?

Thoughts/help?
My 13' kinda sounds this way under hard acceleration. Almost like a hollow metallic sound. Could be the stock muffler idk.
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Old 01-13-2015, 09:42 PM   #9
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Check the metal heat shield under the Jeep right under the driver side. All the way to the front of the shield towards the engine. Mine was loose making a noise when accelerating.

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