A local tuner has an ultrasonic flow bench thing to do injectors. When I bought some second hand higher flow injectors for my supercharge build on another car I had them cleaned and flow tested for about 45 quid. Which was worth it given they were second hand (although the before and afters did change they wernt a great deal away from max flow.

Anyway. I have read about people having a few issues with TD4 injectors. Is it worth getting them cleaned and seals replaced if they don't currently have any faults? As a bit of a preventative measure?

Car has 119k on and is a 2001 Td4 .