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Batting material under engine cover

spireland

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Anyone know what the purpose is of the batting underneath the Ecoboost's engine cover? I took it off today and was surprised to find it.
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dragonacc

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Noise reduction. Direct injectors are noisy.
 

neodark

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click, click, click...
 

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ultimate warrior

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click, click, click...
just to be clear, if you're 25mph cruising, and you start to get into boost , it starts ticking loud and sounds like an exhaust leak while its spooling right?

just making sure my shitbox sounds like everyone elses.
 

EcoSwag1990

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I don't hear any ticking when I accelerate. Only when car is idling and I'm standing outside of it. Though I don't remember what it sounded like when exhaust was silent. That sounds like you might be describing low rpm lugging
 

ronv95

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just to be clear, if you're 25mph cruising, and you start to get into boost , it starts ticking loud and sounds like an exhaust leak while its spooling right?

just making sure my shitbox sounds like everyone elses.
that's correct
 

AR306

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Yeah at slow acceleration/low speed the ticking in mine gets noticeably louder until you get into boost then it's replaced by pfffffffffffssssssst psshss
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