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#61
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Here is a little tinkering. I didn't get the valves yet as no money, but I had a non return valve that need some pressure to open and I just plug it in at the return. The car seems more responsive and defenitly the boost stay highter for longer, a nicer sturdy curve, instead of dropping rapidly when the revs goes high.
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E300TD year 2000. RUSTY SOLD cost a fortune to maintain on the road but run well on WVO Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long? Third lasted a month then went away... Fourth now... Corroded too... |
#62
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w123
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well...it turns out that mine is un-serviceable one...so I found one from w123 when opened the spring measured 21.5 mm so I made 5mm shimm. when car cools down I will give it a test ride,..only thing that I have to be patient is NOT to cut open mine old un-servicable to actually see dimension of the spring once again,TX whunter .
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w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded next wish/project: w114 coupe OM603 powered |
#63
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This is brilliant. And it fitted perfectly instead of the un servicable one?
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E300TD year 2000. RUSTY SOLD cost a fortune to maintain on the road but run well on WVO Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long? Third lasted a month then went away... Fourth now... Corroded too... |
#64
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yeap p.s dont do it like me....on hot engine ...
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w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded next wish/project: w114 coupe OM603 powered |
#65
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lol, on a hot engine, ouach... That must have been, well, hot...
I did the pump advance many time on a hot engine to test it, and the heat can be un bearable... Thank you for the hint. I am looking to get one like yours but my yard broker had none so far I think if its slightly highter in pressure it might be better? More fuel coming in? I certainly get a bit more with the non return valve as it need some pressure to open therefore putting/ leaving more fuel back/ holding it in the system instead of directly going back to the tank. This is good news and again thank you Olivier
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E300TD year 2000. RUSTY SOLD cost a fortune to maintain on the road but run well on WVO Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long? Third lasted a month then went away... Fourth now... Corroded too... |
#66
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can this cause high rpm power loss in an otherwise good starting and running OM606.910 engine
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2012 BMW X5 (Beef + Granite suspension model) 1995 E300D - The original humming machine (consumed by Flood 2017) 2000 E320 - The evolution (consumed by flood 2017) |
#67
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Answer
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. |
#68
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Curious minds want to know, its been s little over a year since the last post......has anyone had any luck on locating a replacement spring?
I see you can order them still but in bulk.....wonder what the cost would be? Overflow-AC Valves and Non Return Valves - Overflowing Valves, Overflow Valve, Over Flow Valves and AC Valves Manufacturer & Exporter from Ludhiana, India
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#69
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Could this spring issue cause a no start condition?
I have fuel going from the filter to the IP, but the IP doesn't seem to want to suck any fuel, even with a small jug placed under the hood to bypass the filters. Jon |
#70
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If the pressure is higher than whatever the relief valve is set for and supply of fuel at decent pressure is available from the lift pump. The relief valve will release the excess pressure. Returning it to the fuel tank. |
#71
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Answer
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The injection pump delivery valves do suck, for correct operation they must have a pressurized reserve to draw from. If the bypass spring has totally failed, no pressure will build. Usually this will not effect starting, however the engine may not go above idle RPM or be weak at higher RPM. .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#72
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Could the relief valve be so worn that it will not allow any fuel to enter the IP? Thanks for the help |
#73
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Does your primer pump leak? Is it the old white plastic twist and pump? What model and year car are we talking about?
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#74
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I'm not familiar with a primer pump, nor do I see any obvious leaks. I just replaced the o-ring on the pre filter.
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95 E300 D 235k |
#75
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How do you know it is a fuel issue? No glow plugs or on some older diesel cars only one or two bad ones can make starting difficult.
Can you say what happened to the car? For example it was running fine and you went to start it after it cooled off and it would not go. Or the car lost power or whatever description of the events that occurred. Judging by your history you may be new to Mercedes diesels. The symptoms of what happened can sometimes provide important information on what may have gone wrong. A quick test is to pump the little pump down by the clear primary fuel filter and the effort to do so should increase. You may hear a noise like a squeal when the relief valve opens. If this occurs have somebody give the car a glow cycle and try to start it with you still pumping the small primer pump. If it becomes stiffer to push or remains harder to push than at first you probably have fuel in the injection pump. First of all though mention what happened to get perhaps sounder suggestions from members. |
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