Would oil residue in boost pipes cause turbo to fail? Been told a full Intercooler flush and clean is needed after swapping a turbo? Didnt on mine and any other pd engine ive had, when i swapped the turbo the car was jacked up on a tilt and both intercooler pipes was undone and abit of oil came out i then left for 2 days on the jack, completed it around 12:30 lunch time and around half 10 at night i got a call saying the turbo had gone? No issues with my car after a turbo swap and i had a good 2 litres or more go into my intercooler.