Isuzu Trooper Owners Club UK™

[Breach]

Hi all,
Can anyone tell me what the unit is that sits left of the turbo as you look into the bonnet?
There's a pipe from the radiator feeding into it and two big hoses joined from the turbo to it.
I'm not very familier with diesels, it's my first.
Anyway I have a coolant leak coming from somewhere underneath this unit. It sprays out under pressure into the engine bay when I stop running the engine.
I was on my way back from Hammersmith on Monday stuck on the A40 watching my engine over heat. Luckily I did not cook it.
Martin

[Google]