When i was having a under the bonnet 'tidy up' and clean I had noticed the turbo feed pipe, the rubber just before was all oily, took the pipe off and it wasnt to bad inside.
I know, and have read about cleaning with seafoam, but its lke rocking horse poop here, so hadn't bothered.
But a local garage has been using a product called Revive to clean sooted diesel engines and sooty turbo's.
So after having some suspension work done yesterday, I convinced them to let me have some.
It has to be done from a stone cold engine, which is a struggle as we use the truck loads, but will attempt to review it with a gopro and let you all know what I think.
Links here for any one interested :
https://reviveturbocleaner.com/index.php/how-to-use