Look for the engine code at top right side of block just below water outlet and post the code. 1.6L Diesel engines sold in USA and German imports start with MF,JX,JR,CY,IV,RA,SB. all have oil squirters.
Well, the big difference is that the hydraulic ones have hydraulic lifters and the solid lifter ones have solid lifters (I bet you already guessed that much). The difference is significant in that the hydraulic lifter heads have an additional oil drain hole that runs through the head between the #1 and #2 injectors. Externally there is a vertical hump in the casting instead of a depression there in the solid lifter ones. Unfortunately the additional oil return channel lines up with a coolant passage in the block making mixing and matching heads somewhat problematic. Here in the US the engines became hydraulic in '86. It is remarkable to me that VW actually kept the same engine codes for solid and hydraulic motors despite the fact that the engine parts do not interchange.Andrew