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Should this hole in air cleaner housing be blocked?


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I've never heard of an open hole in the intake system down stream of the air filter...

 

I say plug it.  you are just asking for dust and dirt to enter...path of least resistance...

 

it was probably for a fastener or clip of some type...maybe a plastic retainer clip to hold a vacuum line neatly in place underneath the air cleaner housing to keep the engine bay tidy?

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