So today I decided to do a clean and flush of my ultimate cross country top mount intercooler that is on my factory td42t blacktop motor.
intercooler has been on for 110000 klms
on removal found very small amount of oil in inlet hose from turbo, so as I thought no blow by on engine which has 335000 klms on it.
Filled intercooler with 4 litres of kerosene , let soak for half hour and agitated, drained fluid from cooler into large container and blue kero had a slight tinge of black to it. Perfect no blow by.
Rinsed with four litres of methylated spirits and drained, perfectly clear.
Let dry and hair dryer to ensure dryness.
Installed back to vehicle and she seems to be running even better.
This after my usual 5000klm oil , filters and fuel filter service.
Seem to come on boost slightly quicker , tuned to 16 psi, and think egts come down slightly faster than before when you get off the throttle.