Hate to say it, but I am feeling a lot better about my 220D after watching your 0 to 60 video. As they say, misery loves company.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

A quart between oil changes is quite good for a 616 engine in my opinion. In fact any consumption less than a quart every 1200 miles is at least fair to me. These engines will also tend to process or burn more oil at highway speeds than in around town usages.

Very slow acceleration is usually the linkage not getting to the injection pumps end stop on these cars. Easy to check with someone pressing the fuel pedal and you observing up front. To keep the existing block in good condition make sure the base fuel pressure in the injection pump is where it should be in my opinion.

It also cannot be oil that you are seeing expelled from your tailpipe. You just do not have a consumption rate that could enable it.

It also in my opinion is not fuel. Too many things in your description. I was also wondering if it perhaps might be coolant but totally unsure of that. Unless your coolant level is dropping off.

Here is a running temp video I just took after running to walgreens for more nyquil... im off to bed.

240D warm idle smoke - YouTube


No smoke or soot... usually there is a little even after driving but for some reason none this time.

The car does mark its spot so I have a drip pan under the car to keep the garage floor clean. If there aint no oil under em there aint no oil in em

Something is not right with the engine sound.

I suggest three distinct video clips.

Hood open, oil fill (cap removed) engine running, please rev the engine once.

Hood open, roughly five seconds of half throttle video, driver side of the engine may help.

Hood open, engine idle, slow steady walk around may be helpful.

.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Here is one of the videos I already have.

240D at idle - YouTube

Does it need to be hot or cold or does it matter?

It sounds like there is injector nailing.

This is closer to what it should sound like.
Phills mercedes diesel - YouTube


Here is a great example of loud nailing, but you need to listen to the full video.
Mercedes om617a engine nailing after startup - YouTube


.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

the phils link sounds more like a bad valve or something puffing into the valve cover.
(after that video ends... anybody look at the 4 alternators on the suburban? WTF?)

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Mine does not sound anywhere as bad as that one does. I'm pretty confident that I do have some injector nailing as well as bad spray from the nozzles. I have some known good injectors on the way to install once I get the pre glow system sorted. I only want to tackle one issue at a time so if I cant get the car started I know where the fault is (in the mirror )

As requested by Roy.

240D idle & blow by - YouTube

Yes, you have some nailing.

You have serious piston ring blow by, that will be worst on cold start.

At higher RPM, the blow by is putting light pressure on the back of your shutoff valve, this pressure is pulling the rack slightly = reducing your power.
It may be worth monitoring your crankcase pressure with a permanent mount gauge.
Call me with any questions.

.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Isn't this is a family owned vehicle with a know mileage of 135K according to the OP's signature - that is some impressive blow by for that (assumed to be correct) distance travelled. Did someone run the oil low? Was there a maintenance accident?

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Yep its a known 135k miles. I have all records from 1992 on since everything prior to that was destroyed by Hurricane Andrew. Sigh.

I received a box of goodies in the mail including some new pencil plugs and a reamer. I will work on that later if I feel up to it. That should help with the cold starts anyway and the new injectors should help as well with the power issues hopefully.

And jobs done



Why didn't I do this earlier? The car is bone cold in this new video.

Fast glow on 240D - YouTube

Wow, that seems like an awful lot of blow by even for a cold engine. My quick test is if I can't let the oil filler cap sit on the valve cover without getting blown off, then the engine is worn. This would contribute to the valve seal theory but it would take a lot of oil to make it through the exhaust. You don't have a turbo, so rule that out.

Can you get a piece of plastic like a garbage can lid and hold it under the exhaust pipe when it starts smoking? Let the stuff on the can lid dry for a while. If it is sooty and dry, it is condensation. If it is oily, it is oil. If it is sticky or sweet tasting, it is antifreeze. At least this is what I would do. Maybe rev the engine a little to help blow onto the can lid?

__________________
1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

Left the car outside last night and it started right up this morning with a 5 second glow time on the new pencil plugs. If this car was my daily driver I would be much more concerned about the blow by than I am (read not much at all) I think I just need to start looking for a 617a to drop in in a few years when this engine finally gives up.