The Red Mog - Fixing the Ignition Timing - OM615 Engine
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- Опубликовано: 29 авг 2024
- Hey everyone!
So! i suddenly realized why the engine in the old red Unimog 421, was running so terrible.
So i went in and fixed it!
If you want to see thind from the start, heres a link to the first video on this old "Barn Find" Mog:
• The Red Mog - Fixing t...
Thanks for watching!
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I nearly bought one of these in 1988. It was a 68 with a red cab too. I was living in Iceland at the time and hadn’t owned a diesel before. Icelanders would add 25% paraffin to the fuel to stop it going solid with the cold. In the end I stuck with my Subaru MV.
Yeah, the old diesels are usually not very fond of the cold.
Thanks for watching!
👍👌👏 Very well done again (video and work). Congrats! After inspecting the piston rings and the prechambers and adjusting the injectors this engine might run well. I guess so because it sounds pretty healthy. No unhealthy knocking to hear so far.
Thanks a lot for making teaching explaining recording editing uploading and sharing.
Best regards luck and health.
have a feeling that you are becoming fond of this Lil Red Truck ..and i hope that you continue a semi "restore" on her...your channel is one of my favorites..
I grow fond of most things, with big wheels. Haha :)
Man, The fuel pump timing is on the money now. I worked on a dodge with a 5.9. I changed the high pressure fuel pump, The entire time I was super worried about knocking the fuel pump timing out. I know that it's every thing in how that engine runs. Great work! perfect solution and diagnosis!
Thanks again, for all your comments, and for watching along!
The unimog sounds so much better now. Have an excellent weekend
Great video, engine sounds great now! Keep up the unimog series!
Thanks for all your comments and interest!
I really like that little mog
that's very possible that someone made a mistake and left it to sit.
*_IT'S ALIVE!!!!!_*
Excellent!
1:22 a cold diesel puffing blacksmoke and coughing like a smoker while in the background a windmill is generating green energy as elegant as possible. cinematic masterpiece
After you install the pump youre supposed to take the delivery valve out of #1 on the pump and drip time them to dial them in.
OK, I am fascinated with Unimog's. ✌
Well then, No turning back for you now!
Haha :)
Good memory!!!
Nice delayed reaction diagnosis! Even missing glass and the cab not being bolted down that Uni is an awesome offroader! Keep up the great work.
Excellent video, keep it up! Thanks.
I'm learning similar lessons on my 2 Dodge M37CDN restorations. I think the previous owner bolted many things back together in "Storage Configuration 😉" to keep track of what goes where, but without properly installing things, as THEY knew it had to come off and be rebuilt, painted, or something, so there is a fair bit of things I'm finding that appear installed that are really just located. Good catch on this one!👍🇨🇦
Hah, i can imagine. It can become quite the job, to try and figure out what's been messed with, on these old trucks. :)
Thanks for watching!
great video good work it is lovely to know that the is more like minded folk that love their 4x4s and working on them thanks and looking forward to the next
Sounds happy and eager.
Nice! I always thought you had to have a magician hat on when messing with a diesel pump!
Haha, somtimes it really feels like you do :)
But most of them, especially these really old ones, are actually not too complicated, once you get into it :)
Hi, thank you for the update. Keen thinking on the engine issue.
What a great easy to understand explanation video, just excellent.
Thanks a lot!
hi, sounds sweet now. what gearbox is fitted, i had a 6 cyl with a 24 speed splitter box. there was an overdrive on 6th gear, which acted as a splitter box giving you 12 gears. with the overdrive "out" you could then engage a low box which gave you a further 6 low gears, pushing the low lever to the right and fwd again engaged the Crawler gears. 1st crawler was incredibly low , you could engage it, walk away and ten minutes later the Mog would be about 10 yards away. with a 6 speed box, are first and second low enough to be considered "agricultural" gears or is this why the low box and crawler box was introduced. Keep up the great work, brilliant to see these wonderful vehicles being used as they should. Please please please show them doing something only a Mog can do !
Well, on these smaller 421 (4 cylinder) models, there were mainly 2 types of transmissions, "F" and "G". This one has the "G" and that basically means that is has an extra low range gear. (Beyond the standard low range) it's somting that could be useful for running different types of tools, that need a high PTO speed (And therefor higher engine RPM) but where you would still want to be driving at really low speeds.
My other 421 has the "F" transmission. the main differance is, that it dosen't have that extra low range.
But even so, the standard low range gear, is plenty good, for most common agricultural work.
And yes, later on, some of the bigger "6-Cylinder truck, got the options for some really extreme low range gears. and it's actually really rare to find those :)
Thanks for you comment and interest :)
Nice easy fix!
you remind me of karate kid, disassemble engine bay assemble engine bay dissasemble bay assemble engine bay again XD
"Disassemble with right hand. Reassemble with left hand"
All I can say is your Vids are awesome, just wish you had more time to do them more often. Keep up the good work. 😁 FYI you should check out the Diesel Creek channel.
I think this guy has Watch Wes Work qualities. His day job is as city bus mechanic.
Thanks a lot!
And yeah, i do watch Diesel Creek :)
@Erik_DK
Det tager jeg som et kompliment :)
Nice!
Congrats, a good find, it realy sounds much better!
Interesting how the mind processes information to solve an issue. 💡Wait, what? Well what do you know!!!
Haha, yeah. these things can come to mind, at the strangest of times.
Thanks for watching!
Sweet, makes me want to buy one of these old beasts =)
I love these kind of videos
Great video again, thankfully you found and solved the problem👌 for a moment I thought you lived in the Netherlands, I saw a Dutch licence plate on the wall 😉
Thanks! :)
And yeah, that was the "Export Plate" that was on my Humvee, when i picked it up, in the Netherlands :)
Thanks for watching!
@@KJOff-Road aha like that! Just for your info, the number has been reused for a new Iveco truck😉
Great video carnt wait for to start fixing it up
Good problem solving! Injectors are junk.
Thanks!
And yeah, i'm also pretty sure they are junk
Super fix 🤠 I have a OM615 that takes a while to start and uses a lot of oil, do you have any idea what that could be?
Thomas
I enjoyed this video. I have a 1958 Army Willys Jeep with the same engine. I have to preheat for 2 minutes and it still starts difficult (not even on the first try, and with some starter fluid) even in 20C termperature.. I am trying to figure out what it is. Once it starts, it runs good. The other thing I have is that I don't have an airfilter on it, and the bypass from the crank cover goes to a T joint and then a hose just in open air and white smoke is coming out. I don't know if that bypass hose is supposed to be connected to the air filter housing? I am planning to check the valve clearance and adjust them, and now you got me thinking about the injection timing.... I. bought it like this, so who knows maybe that timing is off also. I didn't understand to well about putting the 4th cylinder in a position with both valves closed? and then move to TD on the crank? I would appreciate any pointers, thank you.
Well first of all, i find the idea of an old mercedes diesel, in a jeep, pretty funny :)
Now, a bunch of things come to mind. First off, your glow plugs. and if they are the old or the new type.
Because the old type are parallel connected. so if even one burn out, non of them will work.
I explain more about that midway through the video "Unimog Barn find - part 13"
ruclips.net/video/GDTejCFE1Jo/видео.html
Next is your "Lift pump" or "Feed pump"
If you still have the original on the engine, there is a little check valve inside that. and if that dosen't seal up right, it will have a very hard time building fuel pressure, at the low cranking rpm.
And lastly, yes. the timing can be off, if somone has messed with it before.
What i'm talking about in the video, with cyl. 4. is simply that im checking that the valves are "overlapping" on that. meaning right where the exhaust is closing, and the intake is opening.
At that point, i know cyl. 1 is in the right place.
Otherwise, you might be a full turn off, despite being on TDC.
oh, and yes. that line from that crank-case, would normally be hooked up to the air-filter/intake.
@@KJOff-Road Thank you for your response. All the glowplugs are working. I will check what you mentioned about the inside of the fuel pump. Not sure how to check or test, maybe to by a rebuilt kit? It makes me think to see if I manually pump fuel before I start, if it starts right away would be a test.
Unrelated quick question here that I can't seem to find the answer to... on a number of flatbeds like this red one, I see a cutout in the rear of the deck. What is that for? I would love to get an old Mog of my own, ever since I drove a U1300(?) military ambulance once in the middle east shortly after Desert Storm
That is for when you have a 3-point lift on the back, for agricultural attachments.
You take out the part of the bed, to allow full lift height. :)
Ah, that makes sense! Cool!
@@KJOff-Road
I honestly thought it may be timing when you fiered it up the first time because of all the white smoke which means raw fuel
26 degrees for TDC is the pump timing or in German 26 grad für OT
27.5 degrees?