hello group,this is my first post,so please bear with me.About a year ago, i rebuilt my 1992 1.6 TD.i replaced all the usual parts during the rebuild process,including 1mm oversize pistons and rings (the parts were from prothe).about a week ago,it started blowing blue smoke when it got to normal operating temp.it seems to be getting worse daily.I suspect it is the oil rings are wore out ,or not seated(or low quality parts).any suggestions about other possable reasons this is happening would be considered. thanks in advance