Is this a common thing?

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I'll remove the air cleaner container & the detatched face of the inlet venturi, clean both surfaces up & probaby rejoin both with some epoxy & fibreglass etc, refit & seal around the fitting with some sika, & take your adice on adding the extra bolts etc. Thanks for that.

Just be carefull with using epoxy & fibreglass, only use if both sides of what you are joining are fixed and dont vibrate, those repairs tend to be brittle, and have very little flex/give, so with the constant vibration and engine movement plus driving, you may end up with fractures and so leaks, as the name suggests, Sikaflex will flex and so resist cracking better, so may be worth looking into for fixing everything, and not just the sealing bit?

Was just wondering though if this is a common breakage with GUs?

Id say its more of a snorkel/install issue rather than a Nissan problem , you are adding something onto the factory air intake mouth, having said that, they should realise snorkels will be added , i guess look at how a factory Nissan snorkel is attached ?

How's your panel collection exercise going?

cheers

I got the s#*ts and bought all genuine stuff, but thanks for asking ,(BTW, ive left my wanted add up as i would still be interested in spares for the future )