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Unread 08-17-2013, 09:22 AM   #1
UTKJK
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2007 JK Wrangler 
 
Join Date: Aug 2012
Location: Seymour, TN
Posts: 11
Startup Grinding Noise - What is it? Video Included

Anyone know what this grinding noise is? More noticeable during morning start-up.

YouTube (Short URL)
?start=" frameborder="0" allowfullscreen>

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Unread 08-18-2013, 12:40 AM   #2
tanstaafl
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2010 JK Wrangler 
 
Join Date: Mar 2010
Location: El Dorado Hills, CA, CA
Posts: 9
video is busted but i bet its a horrible whirring grinding noise right as she cranks...mine was doing it, turned out to be the one way bearing in the starter..quick and easy fix by replacing the starter..
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Unread 08-18-2013, 08:16 PM   #3
suicideking
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2006 LJ Wrangler 
 
Join Date: Apr 2012
Location: Riverside, CA
Posts: 694
Yup, video link is bad.
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Unread 08-19-2013, 10:54 AM   #4
Cooneys08JK
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2008 JK Wrangler 
 
Join Date: May 2007
Location: Martha's Vineyard, MA
Posts: 737
Quote:
Originally Posted by UTKJK View Post
Anyone know what this grinding noise is? More noticeable during morning start-up.

http://youtu.be/eWWQH8sFbTU

Jump to:
@:19
@ :55
@ 1:15
try this
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Unread 08-19-2013, 11:14 AM   #5
nwAdamR
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2008 JK Wrangler 
 
Join Date: Nov 2010
Location: SW Portland, OR
Posts: 37
A weld busted on my oil pan skid that rattled during certain RPMs and temperatures (especially during morning start-ups). Double-check those welds perhaps.
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Unread 08-19-2013, 08:39 PM   #6
suicideking
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2006 LJ Wrangler 
 
Join Date: Apr 2012
Location: Riverside, CA
Posts: 694
Ya, not sure either. Do you wheel it?

One thing to check if you do: I had a rattling sound only when in reverse, usually only when cold. It ended up being a skid plate that got bent and was contacting the exhaust. I made a video also. I won't post it here because then people might mistake my noise for yours...
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