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+--- Thread: Nozzles (/showthread.php?tid=6260)
Nozzles - Sleek~silver602 - 02-19-2015
So i have been reading all night on which nozzles to order for my OM606 98 E300. I have read that the SD315s flow more fuel but cant find them any where. the SD314's are suppose be a great nozzles but the stock nozzles are SD310's im so confused on what to order help please.
RE: Nozzles - raysorenson - 02-19-2015
What's wrong with the stock stuff? I never hear of anyone trying alternate nozzles on a 4v motor with better results than the 310's.
RE: Nozzles - F.R.A.S - 02-20-2015
The injectors flow what ever you give them in quantity so don't worry.
RE: Nozzles - Sleek~silver602 - 02-20-2015
Thanks so the sd 314 bosio are good. I'll get those ordered soon. The car has 190k im sure the nozzles are factory so they need to be changed but the reason i am changing them is because the car has a weird stumble(misfire) at idle once its warmed up. car runs awesome once its past 1500 rpms its a rocketship (to me i just bought it and i own a hopped up cummins) for what it is. hopefully the nozzles will resolve this issue. I am thought thinking its odd because it was -24F 2 nights ago and in the morning the car fired right up no issues at all. CEL on comes up as P300: multiple missfires.
RE: Nozzles - Mr_Robs - 02-20-2015
Keep us updated if the nozzles fix your missfire issue!
RE: Nozzles - F.R.A.S - 02-21-2015
Or just clean the original injectors and change the little heat shield under the injectors. No need to replace them.
RE: Nozzles - Sleek~silver602 - 02-21-2015
So idi nozzles aren't like DI where the pine wears down over time and atomization starts getting worse?
RE: Nozzles - F.R.A.S - 02-21-2015
(02-21-2015, 01:15 PM)Sleek~silver602 So idi nozzles aren't like DI where the pine wears down over time and atomization starts getting worse?
I'm no nozzle guru really but we have never replaced any. We just clean them up and change the pressure (and actually we don't do that either, Dieselmeken does that for us)
The nozzles in an IDI-engine are protected in a whole other way then in a DI engine where it's in the middle of combustion.
RE: Nozzles - Sleek~silver602 - 02-21-2015
True point... maybe I'll just take them out and have them cleaned repopped and heat shields. Is the special socket needed for removal?
RE: Nozzles - F.R.A.S - 02-21-2015
(02-21-2015, 01:42 PM)Sleek~silver602 True point... maybe I'll just take them out and have them cleaned repopped and heat shields. Is the special socket needed for removal?
Special socket, but available on eBay.
RE: Nozzles - Duncansport - 02-21-2015
i just use a long oxygens sensor socket 7/8th's .. Been using one for 15 years on 606's. Work fine, easy to find locally.
RE: Nozzles - Sleek~silver602 - 02-21-2015
Thanks man ^^
RE: Nozzles - barrote - 02-21-2015
or a 20 22 mm plumber socket
RE: Nozzles - Volker407 - 02-22-2015
(02-21-2015, 01:15 PM)Sleek~silver602 So idi nozzles aren't like DI where the pine wears down over time and atomization starts getting worse?
IDI nozzles also show wear but not as fast as DI nozzles.
DI nozzles can be completely done after 60.000miles
IDI nozzles mostly last 100.000miles without problems, but should be checked/replaced after 60.000 - 100.000miles.
After your mileage on the car and the misfire issues it really makes sense to put new nozzles in as even original IDI nozzles don ´ t last forever.
On the picture you see a used IDI needle from a car with 100.000miles (needle was extensively cleaned before taking pictures).
The cone section shows already noticeable cavitation pitting.
On the smaller cylindric section there is also wear in combination with deep scratch marks in the moving direction from heavy soot deposits. Those soot deposits can become hard enough to scratch the needle in the long term.
If you put such cleaned nozzles back in the car the engine will of course work due to the prechamber working principle.
But the spray quality is worse and you may still have issues like e.g. misfiring.
So no matter if you have 190.000miles or 190.000kilometers - buy new nozzles.
If you put such cleaned nozzles back in the car the engine will of course work due to the prechamber working principle.
But the spray quality is worse and you may still have issues like e.g. misfiring.
So no matter if you have 190.000miles or 190.000kilometers - buy new nozzles.
Gruß
Volker
RE: Nozzles - Sleek~silver602 - 02-22-2015
^^ that seems way more legit to me. Im looking at the bosio ones every where i have read they say the spray is second to none. perfect atomization.
RE: Nozzles - erx - 02-22-2015
Before changing the nozzles just take off the injectors and let diesel shop to test them. Usually they really just need to be cleaned and no need to change the nozzles. My local diesel shop tests the injectors on manual bench with manual handle, just pressing extreme amount of fuel through the injector and that cleans the nozzle, simple. My 606 donor had over 460000km and diesel shop said there were genuine nozzles in the injectors, so with quality fuel half million km is no problem for merc nozzles.
RE: Nozzles - Sleek~silver602 - 02-22-2015
I have access to a pop tester so ill check them but if the needles look like the ones volker posted cleaning them wont make them atomize right again the needle is shot.