The two schools of thought here are as follows; 1) There are a lot of gear driven oil pumps out there from engines that have done high mileages and have not failed and the only people who post on this section are from disgruntled owners who have had issues. As such I am not going to do anything and just run my car. I think this is a good attitude to take and if my own engine (BLB) had been say a BRE unit I think I would have gone down this route. 2) The second school says there are a lot ( whatever a lot is ?) of gear driven oil pumps where the hex shaft has rounded and serious engine/ turbo damage has been done and I AM GOING TO PREVENT THIS.I believe these owners have replaced or just reversed the hex drive connection from the balance shatft assy to the oil pump.This is a pro active measure that can be done at relative minimum cost. In summary " you pays your money and you takes your pick ", there are no hard and fast rules here and its up to the individual to determine what's best for him and his pocket.