Om651 is pretty solid engine, but working on things like engine mounts, oil cooler seals and even a simple valve gasket job is a nightmare

i like know about 722.100 valve body rebuild

Hi. I first sprayed mine with a blast of air, and i was glad i did, all sorts of muck and dirt came out while old ones in. I soaked mine over night with engine oil.. (i was worried about fire!!!) Anyway, tomorrow’s my first time taking glow plugs out after about 300videos!!!! The engine will be hot, so wish me luck..

i have a 2013 C220cdi with the 651 and the crank just started tapping a week after having the oil changed, replacement engines are so expensive for these

Sure, you can replace one injector and it will work, but proper way is to change all of them when one fail.

Hi, thank you for an informative video. My ML350 CDi starts and then dies. Have you ever come across this problem? It runs for 1-3 seconds and then dies. It has new low and high pressure pumps, new fuel rail pressure sensor, new fuel rail pressure regulating valve, new fuel filter, 6 new injectors, new fuel pump relay, new cam shaft sensor, turbo refurbished. Because of the struggling I now have to replace the battery. Day 1 after coming from workshop it starts easily, day two it starts and runs but shudders a bit and then runs perfectly. The next day it starts for 1 second and dies. So basically every morning on first start. Then its dead.

Hi, I hope you can help me. I have a om613 making a ticking noise coming in the cabin. U can’t hear it outside. Change injectors, change hp pump, lifters all of them. I’m going crazy. Car runs great but still have the ticking noise.

Thank you for making this video! It really helped a lot. I don't think I would have tried this without your step by step guide. For those of you giving this a shot themselves; - I ordered brand new axle shaft nuts at €5 a piece. Mine had it's keeper pried and tightened once too many IMO. - The nuts and bolts on the control arms are really tight and needed a lot of persuasion to come loose. - I tightened these nuts back on to 50NM torque + 90° turn. But it worked out great: the error is gone and I'm in control of the gas pedal again. Why would the car lunge and throttle on it's own without this sensor functioning? I get the ABS & ESP, but what about the automatic transmission? I often had to stomp the brakes to prevent the car from accelerating on it's own ,without even touching the gas pedal. The car even kept on revving up under brakes? Weird. But all fixed now 🙂

I’m surprised the US doesn’t get diesels after 17. The engine i really want is the OM656 in the form of E400d E-Class All Terrain - there’s only a small batch of them in Australia that were a cancelled police vehicle order. I’ll be waiting for a lot more depreciation to take effect yet… There’s a W212 6 cyl 2012 BlueTec I want - but I’ll definitely be considering four cylinder options thanks to your informative video. I think Australia is only getting diesel in SUVs now, and no longer in the E-Class. Thanks for the run through of options! Good vid!

I own 2 w204s & one is at 200K Miles & the other at 96K miles so far so issues.

Extremely well presented much appreciated. May the rest of your day be blessed thank you.

the 651 has problems with the oil pump. its a 2 stage pump so the oil pressure doenst go over 2bar under 2krpm. i suggest deleting the solenoid and locking the pump to high pressure mode. it makes everything last longer. timing chain lasts 300k kms on the 651. if the engine is ran low on oil the bearings will bite into the crank and spin bearings. these engines dont last with a lot of coldstarts and long oilchange intervals. change the oil every 10k kms/6k mi. ultra common engine in finland. over 60% of benzes currently for sale here are with 651 engine. very good engine IF maintained correctly. 180cdi models are extremely underpowered, same for 200cdi (single turbo models) 220/250cdis are awesome, the power curve is amazing

the 648 is the best 6cyl commonrail ever for passenger cars. the 4/5cyl versions are also best in class. same goes for om611/612/613

MB trading off their inline 6 diesel reputation. The new ones are shithouse.

What you think can be done if ISA test failed when testing the injectors on the machine? Tnx

My 2014 sprinter with the OM651 has 320,000 miles and runs so smooth and like new, it was a fridge van delivery vehicle so constant stop and go in city traffic. Mine is non dpf fluid.

you don't remove internal parts of nozzle not to let contaminants go inside,but you sandpaper it?? something weird about it man

Absolutely tthe worst bag of shit I ever had. The water leaks piezo injectors. Simplex timing chain At the rear god knows why they did this. Then the twin lanchester balance shafts. why put dual mass flywheels and balance shafts on a diesel.

Oil cooling is not making sense on this engine. First trying to cool the oil to 100 Deg Celsius, using coolant at temperature 108 C. Second - the water pump stops turning at speed to save fuel. Oil pump decreases debit as well. Oil pressure drops and oil temperature goes up. Engine seizes not even being under load. Had one and seized and repaired too many times. Mercedes said the have to replace the whole engine block. Replaced with a petrol engine.

I have a 2005 OM648 W211 with only 58k miles on it, it will outlive me and possibly my teenage son! Just de catted it and give it a nice balanced map for economy and a bit of extra oomph when needed. Service it every 5k miles using only OEM parts or Bosch at the very least. The only downside is that stupid SBC pump issue so have money aside for when that goes (if you're not in the USA) I'm in the UK and Mercedes screwed us hard with that! No 25 year warranty for us. Word to the wise be very careful about blanking the egr as these engines will run hotter with it and risk frying your head gasket. Just pull the inlet/egr every summer clean it out and do the swirl flap mod while you're at it and it will sail to a million no problem.

It was mind blowing watching this video until I realised that this is about the us market, in europe om646, om642 and om648 are EVERYWHERE lol

As most injectors these days are coded to the ECU, wont your re-surfacing mess up the calibration? Most other videos I have seen all say the spacers and washers are adjusted to get the injector to a certain operating spec.

Take them off in the summer and plonk them back on for the winter, Don't even bother screwing them down, they don't move an inch once the bonnet is down. Cheapest mod ever.

Hi.Where to find any repair brochures for this turbocharger ?

love the look of my W164 350 cdi,need to adress oil cooler seals,new front cv axles,diff rebuild and looks like this car has to be driven pretty often otherwise it would crank and not start because probably computer wouldnt get enough electrical power,i didnt use it for a 1.5 month and had to reecharge the battery,im also putting new borg warner transfer case chain aand meyle guibo,its gonna run like new :)

whats the name of this ? pcv?

Can’t you just vent your PCV to atmosphere like any other large diesel engine , that’s what I did with mine

You didnt show the shock dissasembly like you said on other video 😣

Espanis

Hoping you can assist me as I have been chasing gremlins in my OM648 2006 e320) for a few months now and not sure what to do next. I have the low rail pressure code and progressively replaced pretty much the whole fuel path from the cheapest item to the most expensive. I have replaced: - Fuel Filter. - Fuel pressure sensor (Bosch) - Fuel pressure regulator (Bosch) - In tank fuel pump assembly - the whole thing with the hoses (Bosch) - New hoses (from filter to High Pressure Pump and return hose from pump). (OE MB) - and finally just today installed new rebuilt high pressure pump (Bosch) Car seems to drive better than it did before the HP pump replacement but still throws the low rail pressure code albeit not as soon as it used to. I still have my old fuel rail sensors but not the HP pump as I sent that core back. I plan to put my old sensors back and see if that makes a difference but thought I'd write to you first. Car has 340,000km and I have not removed the injectors yet. I'm really at a loss what to do next and could use your guidance. I had high hopes for the HP pump to finally solve the issue but was quite shocked when it didn't.

great video sir !!! wow stress levels waaay down after this information 🙏👍👍👍

In Europe there are OM651 EVERYWHERE. My conclusion to the reliability is that there are so many of them, but more than a few have timing chain issues. I’m not sure as to why it’s a weakness, but seems like most say it’s a stress/old oil/single chain weakness thing. But still some taxis etc make it to like 500k km. I’ve had 1 in a E250 CDI 4 matic. With over 200k km ran like new.

Hey, what do you think of e320 cdi downpipe without DOC? I sent my ECU to Austria and fot it fixed for 250euro + shipping.

I have an S211 wagon with 4matic and standard front coil struts, rear standard shock absorbers but with hydraulic/air springs… do I need any special tools to replace the shocks in both the front and rear?

You sure you put enough torque on that lower strut bolt?

Help!!! So W212 E63s . Rims are fine. Balancing n wheel alignment done but car still vibrates at 150km/h

I drive a 2016 E class with om651 250 CDI version with 80k KM on clock and its the same, also i work in a merc garage and i done this test on multiple om651 and everyone is the same... Same on almost new engines and same on engines with 600k Km on clock. Also my old E class 2009 with same engine with 310k km had this same thing.

I bought 2017 C class with this engine in january and so far its been alright (especially compared to my other 3 audis I had before), there has been quite alot done to the car but most of them were paid by the dealer and I plan to keep the car for a while. Stuff done: New battery A-service Transmission fluids coolant replaced all filters replaced broken right indicator nox sensor adblue pipe water pump center console trim which was broken fixed steering knocking ( not sure what they did but it was fixed)

I HAVE NEVER SEEN MORE STUPIDER SHIT THAN IN THIS VIDEO I WORK ON THIS UNIT FOR JUST 25 YEARS

la meilleur video sur ce sujet , clair precis PARFAIT ca parait tellement facile quand c'est bien expliqué que ca donne envie de le faire soi meme ,tanks you

Interesting Video and glad to see you are having fun away from diesel engines. Is there a way to contact you?

I have a valve cover leak. It will get fixed next month along with silent blocks and front lower control arm. The shop is half staffed with courses for new generation EVs going on.

I hate it so bad. Its unplayable most of the time...

Please no killing games. Please do not destroy spaceships or flying saucers.

Damn, wish I would have watched this a year ago, would have fixed two problems. Great video and descriptions .

This engine water pump has a shroud that is pulled round the impeller by vacuum, the impeller still turns but not in the water, as shroud covers it, when block temperature goes up the shroud/cover starts to drop down letting water pump impeller circulate the water, it helps warm heater up quickly of course, but I’m told the main reason is hot engine more efficient burn of fuel, less pollution better MPG quicker.

As long as you do regular oil and filter changes with good oil, the chain should last a long time, I know a Mercedes mechanic, neglecting it is what causes the problem, so many thousands of these engines used, and as always a few problems on line and it gets blown out of proportion, hydraulic power steering much better feel, AMG keeps it for this reason !!! good video, thanks.

soak with penetrating oil every day for 7 days . After application drive till at operating temp . When removing do when engine hot Loosening ,,,start by tighten with tension wrench till reach click point 5x Then undo 30x till click point of tension wrench set at relevant tension . If this does not work use low tension hammer action asper video

Is the channel hacked or something else?

I own a OM651 and do agree that when stuff breaks it’s piece by piece. 1 lamdasonde 2 abs sensor it’s always sensors that are stop functioning. It drives just wonderful…one of the best running engines I’ve had