You know what you should do.
You are a Professional Pilot - Do the right thing.
Record the defect in the tech log - and then see if the engineers are happy to sign it off as not a problem. It's one thing to tell you it's ok - but make them put their money where their mouth is and write it down.
If you allow that situation to continue without intervening or, if necessary, reporting it to the authorities then you may well end up in the horrible position of sitting reading the accident report and having to acknowledge that you could - and should - have prevented it.
Yes - you might suffer as a result of doing the right thing, but others may suffer if you do not.