Worn Balance Shaft Bearings: Over time, the bearings supporting the balance shaft can wear out, leading to excessive play and rattling noises. In this case, the balance shaft assembly may need to be replaced or deleted.
I just had a workshop remove the worn coupler. They charged me for 6 hours, is that about right? Also now there is an engine vibration that shakes the dash about 1500rpm but ok everywhere else. I've never heard anyone complain after fixing their balance shaft, maybe it's something else 😒
