New member, need help, go figure ;-) - 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: New member, need help, go figure ;-) (/showthread.php?tid=3378) |
New member, need help, go figure ;-) - bryant.cw - 02-21-2012 Sorry to be that newb that just shows up to pick brains, but I really need some help. Vehicle/engine W460 g wagen '83 om617.952 non-California engine, unknown mileage, I think around 200k, donor car odo was broke at 183k miles Symptoms Missing on cylinder 1 Hard nailing cylinder 3 Shaking at idle, only after 20 seconds of running, smooth at first Low power Gray smoke at idle Hard to start when cold Clear fuel filter gets almost empty within a few seconds of startup, splashing and frothy looking fuel in there, very clean though. Leaky primer pump Leaking Delivery valve cylinder 1 Little output at cylinder 1 injector line Bubbly fuel comes out of drip tube when pumping primer during IP timing check Will not start on first attempt after running, even if just for a couple minutes Fires up on first crank after it has sat awhile Foul smelling exhaust See video of 'cold' startup http://www.youtube.com/watch?v=-HswsITEJVs&feature=youtube_gdata_player Already done: Both Fuel filters, not the strainer yet Rebuilt/balanced injectors with monark nozzles IP timing set to 24* BTDC New fuel line from tank to lift pump Cleaned Alda banjo bolt Valves adjusted Compression check 290-340 all cylinders (3 was lowest) Great oil pressure Some blow by, not excessive Thermostat/water pump New beru glow plugs, reamed out carbon Egr deleted Checked with gas cap off, no change. Loosen injector 1 line, no change, very little fuel present Loosen injector 3 line, nailing goes away All others cause more missing/shaking diesel purge Seems like it is starving for fuel, maybe lift pump What now? RE: New member, need help, go figure ;-) - fte - 02-22-2012 Sounds to me like you have a fuel starving issue or air in the system. To eliminate this I would bypass the tank and run it off a jug, both supply and return in the jug to see what is happening. Do you have the tank vented? Return line all the way to the bottom of the tank? RE: New member, need help, go figure ;-) - huseyin55amg - 02-22-2012 hi there, i am sure you will get a decent reply by the experts here... rgds hus55 RE: New member, need help, go figure ;-) - Volker407 - 02-22-2012 (02-21-2012, 03:05 PM)bryant.cw Clear fuel filter gets almost empty within a few seconds of startup, splashing and frothy looking fuel in there, very clean though. You have answered yourself first step overhaul the pre supply lift pump and hand primer pump replace rubber and copper sealings on all delivery valves check overflow valve do diagnosis again and report Gruß Volker RE: New member, need help, go figure ;-) - bryant.cw - 02-23-2012 Thanks, thats what I thought. Yes, I did try a jug sitting right next to the pump, didn't make any difference. I will get the new style primer pump and a new lift pump, replace all the washers and whatnot then report back. RE: New member, need help, go figure ;-) - bryant.cw - 02-27-2012 My parts supplier can't find the fuel pump overflow bypass and spring part numbers. Does anyone have these numbers? MW pump, 1983 300d, 617.952 RE: New member, need help, go figure ;-) - bryant.cw - 03-01-2012 Tried new lift pump and primer pump, no fix to nailing and missing but it did solve the air in the lines. I have an om617a with 130k miles lined up for it next, should be in much better shape. Oh well, thanks for the advice. RE: New member, need help, go figure ;-) - Volker407 - 03-01-2012 Did you fix the delivery valves? That is much easier than an engine change I would say. (torque wrench necessary) Overflow valve only needs to be checked, no need to buy a new one. take it out, clean it, check length of spring (26mm I believe, if too short stretch it) If it doesn´t get better after delivery valves and overflow valve fixed change injectors with your spare engine, then report back Gruß Volker |