Hi pitch squeal at 2500 rpm

[BigTrev]

Quick question while towing my camp trailer home yesterday my nav has developed a hi pitch squeal at around 2500 rpm while going up a hill any ideas as I'm stumped thinking its a belt or a bearing just wondering if anyone has had the same issue or similar?

 

[tyron]

Could it be a whistle from a loose turbo pipe?

 

[BigTrev]

Not to sure I'm getting service done Tuesday so I'm gonna put it on them

 

[Old.Tony]

At 2500rpm up a hill your turbo will be at full song. I'd say boost leak - probably a split hose, the D40 intercoolers aren't too bad (unless you've got a V9X with its ballooning intercooler).

 

[BigTrev]

Yeh mate my hot pipe expands nearly an inch but its not leaking there let Nissan figure it out that's what I pay them for.

 

[nathand22]

Yeah i would think its turbo related also, BUT i have heard of EGR pipes getting tiny splits in them which let a squeal out at certain revs, however they have been more on the D22 and the ZD30.
Still may be worth having a look and it can still happen if you have only blocked the exit end of the pipe.