variety of OM617 tachs - Printable Version +- STD (https://www.superturbodiesel.com/std) +-- Forum: Tuning (https://www.superturbodiesel.com/std/forumdisplay.php?fid=6) +--- Forum: Engine (https://www.superturbodiesel.com/std/forumdisplay.php?fid=7) +--- Thread: variety of OM617 tachs (/showthread.php?tid=7203)

variety of OM617 tachs - bricktron - 05-09-2016 hi folks, i was butchering a five-cyl tach to convert it when i noticed that the other one i had on hand was different. the VDO part numbers differ as do the signal jacks and circuitboards. the numbers visible on the two tachs are: 230/154/1 14000Hz, on the one i was cutting up; and 230/107/15  6000Imp., on the one from a cluster which is elsewhere stamped 1982. unfortunately i don't know where the butchered one came from. do these two units work the same? the numbers 6000 and 14000 sure make me wonder. cheers! RE: variety of OM617 tachs - NZScott - 05-10-2016 The one with 14000 is meant for '84-'85 cars with EGR computer. They had a VR sensor on the flywheel with ran off the starter ring teeth. You can bypass the EGR computer however. I imported one of those, and bought a VR sensor (for a 6BT) myself but haven't quite got to the stage of seeing if it actually works yet... RE: variety of OM617 tachs - bricktron - 05-17-2016 thanks Scott! since i don't have the flywheel sensor, i guess i need an older tach.... cut up the wrong one. onwards and upwards! RE: variety of OM617 tachs - EvoPeter - 05-20-2016 If i remember correct i took a w124 or w201 diesel tacho and installed it in the w123 cluster 1 year ago. Had an om606 in that car from a w124. Only drove some km with it before i sold it.