om617 Vacuum Drive Plate-Necessary? - 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: om617 Vacuum Drive Plate-Necessary? (/showthread.php?tid=3283)

om617 Vacuum Drive Plate-Necessary? - Simpler=Better - 01-17-2012 How necessary is it to have the vacuum drive plate installed on the timing device? I'm completely removing & blocking off my vacuum pump, do I have to keep that plate (with the "rollercoaster" driver) installed? Can I completely ditch the plate and bolts? RE: om617 Vacuum Drive Plate-Necessary? - Greazzer - 01-17-2012 I am in that process now, and to remove the pump, a "cap" will have to be made that permits the cam and bolt to stick out but be covered. RE: om617 Vacuum Drive Plate-Necessary? - Simpler=Better - 01-17-2012 I'm making a cover from the old vacuum pump housing-I'm cutting it off and welding a cup on it. I'll get some photos up one of these days! RE: om617 Vacuum Drive Plate-Necessary? - Greazzer - 01-17-2012 Cool. I got a fellow forum member making me the cat's pajamas version. The Audi electric vacuum pump is a nice option. RE: om617 Vacuum Drive Plate-Necessary? - kmaser - 01-18-2012 I believe that the plate with the vacuum pump "roller Coaster" is also the retaining plate for the timing device and you can't remove it. Has anyobdy ran a 617 without the vacuum pump, there is a brass bushing with a thrust surface behind that drive that the IP drive shaft goes through. If the pump isn't on there it might possible for the sprocket to move axially without the vacuum pump to keep tension on it. If so that could causse premature chain wear? RE: om617 Vacuum Drive Plate-Necessary? - Greazzer - 01-18-2012 So, do you think that something will need to push against that cam from the vacuum pump side of things ? RE: om617 Vacuum Drive Plate-Necessary? - kmaser - 01-18-2012 TO be honest i'm not really sure, I just rebuilt my OM617 and was thinking about removing my vacuum pump. That's when I noticed that the pump keeps that shaft pushed back, maybe somebody else has done this and knows 100% the answer. RE: om617 Vacuum Drive Plate-Necessary? - Simpler=Better - 01-18-2012 There are photos of a motor somewhere with a factory blockoff plate, it should be okay without the vacuum pump. gauging by the wear marks on the plate, it looks like it helps retain the IP timing device. I'll leave it in place for the time being. RE: om617 Vacuum Drive Plate-Necessary? - Greazzer - 01-18-2012 PLATE ??? The cam (whatever you call it) sticks out almost 1 1/2" (I used a Craftsman 19mm socket as my measuring device at the junkyard when I started this R&D). I plan on keeping that cam and bolt, just getting rid of the vacuum pump altogether. Can you remove the entire bolt and cam? RE: om617 Vacuum Drive Plate-Necessary? - Simpler=Better - 01-18-2012 As I understand it, the cam is part of the "Timing Device" for the injection pump. I chose to cut off the lobes for a weight savings/ improved balance and reinstalled it: RE: om617 Vacuum Drive Plate-Necessary? - led-panzer - 01-20-2012 This is that plate I made for Greazzer. Hopefully it works lol         RE: om617 Vacuum Drive Plate-Necessary? - Greazzer - 01-20-2012 THAT IS AWSOME !!!!! I need to get back home ASAP and get wrenching !!!!! That is too pretty to put on an engine !!!! RE: om617 Vacuum Drive Plate-Necessary? - Simpler=Better - 01-20-2012 Yeah that's wayyyyy prettier than mine will be