I don't know if 1.5 and 1.6 diesel flywheels are interchangeable? I do know that on my 1.6N/A, I upgraded my flywheel from the 190mm to a 210mm lightened gasser flywheel, this was on my 4A transmission. You have to also use the appropriate pressure plate for that flywheel, meaning 190mm for the 190mm and the 210mm for the 210mm. Also, keep in mind the timing marks on the flywheel will be different. I had to remark my gasser flywheel timing mark for TDC for the diesel motor.
Good information all around. I'm going to contact Black Forest Industries to ask about the timing marks on their steel flywheels.I bought a clutch, pressure plate, and flywheel setup from a forum member a while back. I "think" it might be a 210 mm, but I'll need to check it when I get home tonight.Steve.