GU111 2001 sounds like siren

[Rayman]

GU111 2001 sounds like siren until you diconnect vacuum hose to turbo actuator
any clues please

[Sir Roofy]

leaking intercooler

[Rayman]

leaking intercooler
roofy thanks for reply as you can guess i am new at forums
I would have thought more maybe the actuator any other clues

[Sir Roofy]

roofy thanks for reply as you can guess i am new at forums
I would have thought more maybe the actuator any other clues

split lines

[bushytas]

If it’s on spool up its most probably bearings in the turbo.
If it sounds like an old WW2 air raid siren a squalling ringing metal sound I would say bearings
If it sounds like a hissing nose then leaking intercooler you should also note a large drop in power or lack of when taking off etc.
I would be checking for a number of things like blue smoke from the exhaust, check air and vacuum lines, check for oil in the intercooler, how many kms has the 4wd done ?
Patrols are known for oil in the intake just make sure it’s not shit loads

[Dingo55]

Rayman, does it sound like a siren or a sweet whistle? It's not just the turbo winding up under load when you accelerate? Does it make the same sound all the time, ie at idle, under load, cruising?

cheers

[Rayman]

Dingo 55
yes it makes the same sound under all three mentioned just varies a little with revs

[Dingo55]

Ok, well in that case I can't offer anything beyond what roofy & bushytas have offered above, sorry.

cheers,