I traded a kayak for a 82 300sd 140k that had not been running for at least 2 years. After rebuilding the injectors changing plugs other routine maintenance I am able to start it after multiple tries. here is the link to a video of it running. 82 300sd hard to start then knocking.. any ideas? - YouTube

Sounds like a spun rod bearing. Time for another engine.

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'83 300D, 126K miles.

First things first: adjust the valves! If that doesn't cure the problem, well, it's something serious.

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[GONE] - 1995 Mercedes E300 Diesel - 130k miles - Smoke Silver (702) over Mushroom leather (265) - Bladder blasting, coast-to-coast work machine.

Questions:

How long had it been running when you did the video?

Did you use any starting *aid* to get it going (such as ether)?

Does the knock/rattle match changes in RPMs, both in frequency and volume?

Can you please do another video, which includes:

1. Steady camera shots, don't move around the whole time
2. At least one closer shot of where you can hear the noise the loudest
3. No background talking
4. LIGHT (I know you are concerned with the sound, but it helps to be able to SEE what is going on too)....

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Thanks for the response. I am going to go further look at it today. When I had first got the car running it didnt make a knock. That was a month or so ago.It ran for awhile when i first got her going. But due to some other things that still needed sorting it wasnt driven.. The car hasnt been out of park. Just a couple engine revs. I got it going again it last night and the knock started. The knock is at a higher frequency when I give it some juice. I used wd40 in the intake.. I am going to try and check the injectors when I get to it later today and I will try and make another vid..

Are you sure it is a "knock" that you are hearing and not "nailing" (precumbustion)??

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"

What's the oil pressure like? What's the oil level like? Use a stethoscope to try to narrow it down. It does sound like a rod but I wouldn't jump to that conclusion yet.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Listen to the video again. The knock has two elements to it. If it were a bad injector, it would only have one. The second sound could be the piston hitting the head at the end of the exhaust stroke.

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'83 300D, 126K miles.

When did you use the WD-40? Please read this post by Ozarkdude before using starting fluids...

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Wow is there oil in the engine? All that smoke out the rear probably goes with the knock.....to loud for an injector nail....Could be the vacuum pump came apart....

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That nearly rings like a bell.

You should be able to work out from where that racket is coming from - it is pretty difficult for us here to do that via the interweb...

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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!

The flex on the downpipe was rusted I had another flex welded on and will be getting around to welding it together soon.

I had a mechanic looking at it a while back and he had used harsher chemicals on it and when he started it awhile ago many it is possible that the engine now is running backwards? The intake seems to push out a bit of smoke... If thats the case would you think it possible to fix with out pulling the engine. Its sounding grimm. I have someone that primarily works on old diesel 300s coming by in the next day or so. So I should know soon what is going on. I also noticed that the oil pan is not the original pan. Maybe something was seriously wrong before I got it, who knows. I felt a $400 kayak was a great trade. I still think it to be, the body minus the not so appealing look of whats going on with the clear coat has great barely worn interior, flawless wood trim, windows/electric all working engine read 140k adjusted valves everything in there looked really clean.