Pcv sludge?

[Gecko]

Thanks dude! Did you drill the hole yourself or did it come like that? And you said yours is metal? I'm assuming you have one of the first ones as mine is composite.

Does anybody know the size of the hole I need to drill? I'm gonna see if I can do this soon.

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[Redtruck-VA]

I would take your IAT into a local parts store and find a rubber grommet the fits it nicely and then measure the groove in the grommet and that will be the size you need to drill.