Your a life saver dude! Thanks for sharing this. I've got an 91 609D here in LA and we just replaced the filter and are having the hardest time starting this thing.
this is exactly the video that i have been looking for. thank you so much! the other videos did not show the function of the fuel system as you have. and they did not describe the three different primer pumps. mine is black and does not seem to lock. now i know why. i hope to replace it though, with a newer one. anyway, thank you for this fantastic video. have a great day. cheers.
@@elmessaoudi1638 If you for some reason got yourself air in the hardlines between the pump and the injector you will most likely drain the battery before your engine fires up :)
Pressurize the inlet to the fuel filter with a small 12 volt diesel pump , crack all the fuel nozzle lines at one time . Restrict the return fuel line flow a little , close the nozzle lines , start engine , remove fuel restriction clamp . Remove 12 volt pump .
Great vid, I just changed the plastic inline fuel filter and now it won’t start, I pumped at least 100 times every time to try and start but it wouldn’t start, I’ll try doing this tomorrow I had to cancel the mot because I couldn’t get it started
@@garyjolleys2480 do you hear a squishy kind of sound when you pump on the primer ? If so, the primer is likely leaking and not moving fuel forward as much as you like. You can replace the primer, but for the short term there is another fix. Which is to get a sealed condom, place it over the primer pump to make it air tight and Zip tie it into place.
@@garyjolleys2480 The primer fix is in car trek video here. about 2/3 of the way through. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-M1SpwlsaiwM.html&ab_channel=Tavarish
My primer pump isnt working i get no resistance on pump.im ordering new primer. This car has been sitting for 10 years .Drained fuel vacuum pump through line. Blew air into tank fuel came out of line at primary filter. No fuel at cracked injector.
A good thing to watch is the fuel flow in the first fuel filter, most of them are transparent, or translucent. is the air bubble in the fuel filter getting smaller when you pump with the primer ? it can take 100 pumps with the little primer to get fuel comfortably flowing around.
@@qwertyui90qwertyui90 gotcha, and what do you recommend to loosen the hardlines with out breaking them if they're really really tight? thanks for your response
@@note_finger I would still use the 17mm. Along with a small sledge hammer to tap the end of the spanner, to give it that "shock" to loosen it up. I have a 5pound / 2kg sledge hammer with a short handle just for that type of task.
@@note_finger haha i was asked about that just a day or so ago. They are just clear tubing that i used as i had nothing else on hand at the time and since it showed the fuel flow really nicely i decided to make the video. It isn't " fuel line" it was a temporary clear tubing from a hardware store. So i do not recommend anyone use it. Any fuel additives may just eat through it half way down the highway ect: It just showed fuel flow nicely during the video :)
It is just simple standard vynil clear tubing. It was in the car temporarily as I had nothing else on hand and it had the benefit of working well for the video to show how everything worked.
a few drops of diesel isn't going to hurt the engine. I cleaned up after i was done any way. It's to simulate being on the side of the road and figuring out what to do :)
@@qwertyui90qwertyui90 of course ! diesel will make your engine shining,but it's the ennemi number one of the rubber parts,especially the engine mounts! i see a lot of videos of young mercedes lovers doing differentiel oil change or valve adjustment or master cylinder without making attention to the debries! it's realy harmful and it's necessary to hold the red flag from time to time! Be sure of my respect and ...i'm not angry lol! i'm so happy to find good videos on w123 .i have a 300 td 1982!