diesel fuel pump
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Injector pump maybe?
The injector pump is the high pressure pump that runs the injectors, that has to do with timing........
What kind of diesel???
The injector pump is the high pressure pump that runs the injectors, that has to do with timing........
What kind of diesel???
I had a Bosch high pressure diesel fuel pump rebuilt for a Volvo MB2D Marine engine some time ago. I believe the "timing" is initially bench set when assembling the pump, but there were also shims between the pump and block mounting surfaces to create factory specification clearance. Not sure if fuel pump timing can go out if pump hasn't been tampered with. I'm not a mechenic, just a personal observation from my experience with this motor.
And which engine are you using?
It all makes a difference. My INJECTION pump needed work when it started leaking around the throttle shaft. Not supposed to have pressure there so I sent it in. When it came back, the timing was definitely off and the engine produced white smoke unless it was fully loaded. The way you adjust the timing on a Westerbeke W50 is to loosen the mounting bolts and twist the injection pump slightly. Tighten the bolts without letting the pump rotate back and then start the engine to see if you've gotten rid of the smoke. If you leave your mechanic down below, you can make 5 or 6 adjustments in an hour.
But once you have it adjusted, you don't have to mess with the timing. If you're injection pump is driven by the crankshaft like mine then it's "probably" not out of time.
Something cheaper and easier to do on my engine is to pull the injectors and have them tested at a diesel shop. If your problem just started, you "may" have a fouled injector.
What we (the designated engine ex-spurts) really need are your symptoms. How is your engine running? Did this just start happening? Is your problem a loss of performance at higher rpms? What color smoke do you have when you're experiencing your problem? All these answers and any other information about when and how your engine is not working right is necessary to diagnose your problem. Right now, we just throwing darts in the dark.
It all makes a difference. My INJECTION pump needed work when it started leaking around the throttle shaft. Not supposed to have pressure there so I sent it in. When it came back, the timing was definitely off and the engine produced white smoke unless it was fully loaded. The way you adjust the timing on a Westerbeke W50 is to loosen the mounting bolts and twist the injection pump slightly. Tighten the bolts without letting the pump rotate back and then start the engine to see if you've gotten rid of the smoke. If you leave your mechanic down below, you can make 5 or 6 adjustments in an hour.
But once you have it adjusted, you don't have to mess with the timing. If you're injection pump is driven by the crankshaft like mine then it's "probably" not out of time.
Something cheaper and easier to do on my engine is to pull the injectors and have them tested at a diesel shop. If your problem just started, you "may" have a fouled injector.
What we (the designated engine ex-spurts) really need are your symptoms. How is your engine running? Did this just start happening? Is your problem a loss of performance at higher rpms? What color smoke do you have when you're experiencing your problem? All these answers and any other information about when and how your engine is not working right is necessary to diagnose your problem. Right now, we just throwing darts in the dark.
I am not much help on symptoms.. knocking if too advanced, white smoke if too retarded.. Since you just took the gear case and inj pump off, might be a good idea to check the timing.. on your Yanmar, probably have to remove the starter to check..
System bled completely through the injectors?
System bled completely through the injectors?
i found that when my injector pump failed, it built up for a bout 3000 miles---from key on in san diego in 2011 april, to runaway diesel syndrome just this year.
black smoke increasingly as we continued onward until midway between zihuatenejo and barra de navidad---is 200 miles--- at hour 40 of the 80 hour passage, we had black fuel and a lot of gook in the water behind the boat lots of black smoke---rpms were still within normal limits and didnt change without our assist.
over time i also noted our boat speed reducing without reduction in rpm.....
in barra we changed oil and hung out for a while--mechanic did his job--- then when we went to pull anchor with electric windlass, engine running, runaway.
this runaway was able to be stopped with cracking all 4 injectors.
took pump into rebuild--yes it needed it badly--prolly a worse case scenario than yours if yours is having black smoke.
those were my symptoms--fuel pump had standing sea water in it-- in places my engine has never seen sea water--verrry interesting....yes i got it used with my used engine..
black smoke increasingly as we continued onward until midway between zihuatenejo and barra de navidad---is 200 miles--- at hour 40 of the 80 hour passage, we had black fuel and a lot of gook in the water behind the boat lots of black smoke---rpms were still within normal limits and didnt change without our assist.
over time i also noted our boat speed reducing without reduction in rpm.....
in barra we changed oil and hung out for a while--mechanic did his job--- then when we went to pull anchor with electric windlass, engine running, runaway.
this runaway was able to be stopped with cracking all 4 injectors.
took pump into rebuild--yes it needed it badly--prolly a worse case scenario than yours if yours is having black smoke.
those were my symptoms--fuel pump had standing sea water in it-- in places my engine has never seen sea water--verrry interesting....yes i got it used with my used engine..
Well I don't actually have any problem with my Yanmar 2GM20F high pressure pump. I've recently removed the Timing Gear cover for replacement of leaking gasket. I've taken effort to measure the exact thickness of the old timing shims (sandwich between pump and timing gear cover) and replaced with new ones. I'm wondering, what if the timing had shifted? How would I know it? Would I recognise there's timing problem and not somethingelse? In fact I don't really know if there's any problem. Engine seems to run fine except it wasn't stable at high rpm without engaging gear. I assume its due to air in fuel line or banjo nut not tight.
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