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2008 V10 Acceleration Buzz

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Old Sep 17, 2015 | 03:00 PM
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From: Tri-Cities, WA
2008 V10 Acceleration Buzz

Over the past couple of weeks my truck has developed a pretty consistent metallic buzz on light/moderate acceleration. At first I thought it was a heat shield rattling, but I've been under it a dozen times and can't find anything loose to make the metallic buzz that I'm hearing... I can pound on several places in the exhaust system with my palm and it seems solid/connected everywhere Anyone else have a similar issue with a V10 truck??
 
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Old Sep 17, 2015 | 03:33 PM
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Have same truck, just started hearing the same thing on mine. Very faint, radio has to be off to hear it. I had the 10M05 Catalytic service warranty work done and it developed shortly after that service. Just turned 72K miles ???????????????
 
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Old Sep 17, 2015 | 04:30 PM
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Originally Posted by KrisF250
I had the 10M05 Catalytic service warranty work done
What is that all about? I'll Google it, but can you give me some cliff notes???
 
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Old Sep 17, 2015 | 04:40 PM
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Service bulletin 10M05, recall on the catalyst Y pipe. Basically premature catlytic converter failure. Have copy of original letter dated 10-2010 if you need it.
 
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Old Sep 17, 2015 | 11:21 PM
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Check the heat shield that passes under the oil pan. The spot welds are kind of poor and can break.
 
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Old Sep 18, 2015 | 08:09 AM
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Originally Posted by KrisF250
Service bulletin 10M05, recall on the catalyst Y pipe. Basically premature catlytic converter failure. Have copy of original letter dated 10-2010 if you need it.
can I trouble you for a copy
 
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Old Oct 9, 2015 | 09:39 AM
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FOUND IT!!

It was the heat shield around the muffler. It finally got to the point where it would consistently buzz right at 1500rpm, so I had my wife hold it there while I crawled around under it and sure enough, the heat shield was vibrating like mad! A couple of large hose clamps later, it's quiet as a mouse
 
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