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  #1  
Old 09-03-2019, 07:36 AM
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Noise...

I am now getting a noise like a small pebble dropping down an aluminum tube (kinda like asphalt shingle grit down a ladder) about 15 minutes after the car has been turned off.(maybe 30% of the time)

WTH? Anyone heard that before? It's from somewhere near the transmission and drivers side running board...

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Old 09-03-2019, 10:22 AM
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It sounds like metal contracting as it cools down slipping past a shear joint. I don’t know what it might be but my first thought was the skid plate. If you have ever removed it and the bolts reused. (Not going to approach that argument ). Just a thought.
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Old 09-03-2019, 10:27 AM
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I honestly hadn't thought about the plate.

I agree, I'm not touching that bolt issue with a 2' torque wrench...

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Old 09-03-2019, 04:43 PM
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Quote:
Originally Posted by EODguy View Post
... It's from somewhere near the transmission and drivers side running board...
Right where the transfer case actuator motor is...

Just sayin'
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Old 09-03-2019, 10:31 PM
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I don't think it's the bolts in the plate and if it's the transfer case motor then would it be some sort of stray voltage from the car going to sleep?

When it happens it's about 15 minutes after shutdown and that clink sound happens about 4-6 times (very small pebble in aluminum pipe sound)

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Old 09-03-2019, 11:52 PM
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I've heard many cars make the "tink tink tink" sound at cool down. Usually a heat shield plate sliding through it's bolt holes.

Your best bet to find it is to drive the car to hot then park it and lay down under the car and wait.

Use a car stethoscope to help


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Old 09-04-2019, 10:54 PM
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It's not the plate or the bolts cooling it's...

1. Thin walled aluminum sound.(plate on mine is like a manhole cover in weight)

2. Sounds nothing like metal contracting.

3. Seems to be about midline of the drivers door.

4. Sounds like a small sharp edged pebble rolling down an aluminum ladder tube.

Is there anything that may depressurize or release when the car goes to sleep? Transfer case motor? Valve body? Something under the body plate (fuel line, secret ninja brake part?

I also run over the under body scanner daily and there's nothing with fresh marks, scratches, bomb on the car...

I've even tried listening after raising car to highest position and shutting it off... will try and catch it on video or audio file.

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Old 09-05-2019, 08:38 AM
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Are you LHD? Pull open the plastic panel under the left side and check on the brake lines that go through there. There are some long sections they could be squeaking through the holders as they cool.


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