I can hear the old pros groaning "oooooooaaaaawwwwwrrggh, another newbie with a post about injector's nailing".....

Well, I've read all the posts I can about nailing and if a picture is worth a thousand words, then a sound file must be worth at least 500. It is one thing to read about what an injector nailing sounds like, and it's another to hear it, and someone says, yes that's your injectors nailing, service them. Or no, that's your timing. Or something else.

So, there is a mp3 of the sound of my car making a clacking sound, here

There's a fair amount of ambient noise because I am driving the car at the time - it only makes the noise while driving at about 1/4 throttle, less at other throttles, hardly any at full throttle or idling.

The funny thing is the sound is hardly there at all when I run it (83 240D) on WVO. I read there is some difference in the timing when using WVO - it burns slightly later or something. The sound is really loud with diesel, which I used today. I get good mileage - about 30mpg.

I would really appreciate it if someone with experience of what nailing or bad timing sounds like could give it a listen and tell me if they can hear what it is. Really appreciate it. I don't want to take out the injectors and and balance them with a pop-tester if they are not the problem. Or start messing with the black arts of injector hoedunkery if I don't have to.

BTW, I checked the timing chain stretch with the alignment on the camshaft and it seemed spot on - almost no stretch at all. If that's relevant, I don't know, this is kinda out of my experience range. I have half the parts, and probably half the knowledge so far on how to do the injector balancing, so I can do that if that is what is required. I did do a millivolt test, and there was quite a range of voltages from the glowplugs. But after thinking about it for a while, I thought what you should really compare is the ratio of glowplug resistance to voltage, not just the voltage.

Thanks chaps, and chapettes.

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1983 240D Silver/Blue "Sadie", unknown miles. 100k miles on WVO single tank, converted to 2 tank about 10k miles ago, FPHE, Injector Heaters, Aux Fuel pump. Alcohol/Water injection. Frantz oil bypass filter
1992 300D 2.5 Turbo Green/Tan "Jade" 267K miles Stock.
1992 300D 2.5 tan/tan "Rocky" on 2 tank WVO. Pressure actuated Turbo "rat's nest" surgery completed. 197k miles