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  #1  
Old 10-09-2017, 12:32 PM
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Question Name that rattle? (VIDEO)

On today’s episode of “name that rattle!” We have a 2003 Mercury Marauder. The owner is experiencing a rattling sound at idle, coming from directly under the car. The owner believes it sounds like the drivers side primary cat on its way out, but he wants to hear from the experts!!! Feel free to chime in!

https://youtu.be/KaGhEAcBaQA

Note that in the video, when the sound goes away is when I give it baby gas. Let off and it rattles.
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Last edited by Chayton; 10-09-2017 at 02:00 PM.
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Old 10-09-2017, 01:36 PM
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bump? come on this is supposed be fun!!
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Old 10-09-2017, 01:53 PM
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tap on the cat and see if it rattles, sort of sounds like cat..what does it sound like under hood? doe the sound come from cat area?
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Old 10-09-2017, 01:59 PM
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Quote:
Originally Posted by RubberCtyRauder View Post
tap on the cat and see if it rattles, sort of sounds like cat..what does it sound like under hood? doe the sound come from cat area?
Hard to hear from under the hood, its definitely coming from the bottom. I was thinking CAT or maybe the $300 torque converter I have in there? Will do more investigating once I get home.
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Old 10-09-2017, 03:00 PM
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Quote:
Originally Posted by Chayton View Post
Hard to hear from under the hood, its definitely coming from the bottom. I was thinking CAT or maybe the $300 torque converter I have in there? Will do more investigating once I get home.
Hear shield of cat I think.

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2002 Grand Marquis LS
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Old 10-09-2017, 03:07 PM
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Hear shield of cat I think.

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Heat shield of cat I meant to say.

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2003 Model 300A
VIN: 2MEHM75V93X611525
Assembled on 06/05/2002
#699 of a build of 7838 and
#699 of 7093 in black
50,000 miles on it


2002 Grand Marquis LS
149,000 miles on it
Arizona Beige Clearcoat Metallic

2009 Grand Marquis LS Limited Edition
53,000 miles on it
Silver Birch Clearcoat Metallic
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Old 10-09-2017, 04:10 PM
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Didn't someone have a cracked flex plate making a similar noise?

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Old 10-09-2017, 05:16 PM
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Check the Torque converter bolts to the flywheel.
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Old 10-09-2017, 05:32 PM
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Yes, sounds like two pieces hitting each other... heat shield or mount pieces clanking agaist each other.

When I've heard inside cat baffles come loose I've heard more like BB's a looser higher sound... although I guess it could be one bigger piece comming loose and clanging against inside.
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Old 10-09-2017, 07:12 PM
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UPDATE: I gave the cat one good smack with a BFH. Noise gone for now
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Old 10-09-2017, 09:27 PM
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I lied. Noise seems worse now. ****. praying this isnt rod knock... if it was, wouldnt it get louder with revs? even the tiniest bit of throttle and it goes away. Didnt have a chance to tighten the torque converter bolts since I need a helper. Praying its not the dreaded rod knock... ugh
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Old 10-10-2017, 08:04 AM
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Flexplate .....
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  #13  
Old 10-11-2017, 07:01 PM
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Sounds similar to the cat converter problem that was present on a lot of 04 Crown Vics. I had one replaced on the 8 year, 80,000 mile warranty, way back when.
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Old 10-12-2017, 09:10 AM
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Chayton... What ways it? You can't leave us hanging!
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2003 300A Black, #4918 of 7838, 17,400 Miles
Tune, KYB's, JLT, FlowMaster 42441, Res Delete, New BFG's, 8 coats of zymoil Titanium

2003 300B Silver Birch, #21 of 419, 29,800 miles
Tune, JLT, FlowMaster 42441 Res Delete, New Nitto 235/255 Bigcarsforever dead peddle & custom SRP peddles, 5 coats Zymoil Titanium, Addco front and rear sway bars, KYBs, 1/2 inch coil cut, Sparts Watts link and Control Arms, Car fixer alignment.
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Old 10-16-2017, 08:46 AM
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Quote:
Originally Posted by 1Marauder View Post
Chayton... What ways it? You can't leave us hanging!
I think its flexplate... Been dealing with some crap so havent had the motivation to get under there. Hopefully this week..... :/
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