Hello, I’m not sure if the topic fits in here or not; if not, the moderators will be happy to postpone it. Now to the problem: a colleague of mine is a workshop master in a VW/Audi workshop and has recently seen some TDI engines with cracked pistons; what should be known is a capital engine damage. The problem so far occurred with 1.9 TDI models and the 2.5l V6 models (180 hp) (always Audi models; therefore the question here and not in the VW compartment) How it makes itself noticeable: no performance; foaming of the oil (since gas pressure escapes into the crankcase etc. etc.) Also bad: many workshops find the error only after expensive exchange of other parts what the repair for the owners still considerably more expensive!! Now my question since it is not so knowledgeable with the PC: is it a coincidence that especially at the workshop of my colleague the piston cracks in driving performances pile up by 150,000 km or is there often?? No discussion whether the TDIs are stable or not; I just want to know if something like this is more common and if other people/drivers/workshop employees are also known!