See attached photos, they pretty much all look like this.

Cars runs ok. Idle is just a little rough, no smoke, decent power (14 sec to 60 mph). Cylinder compressions are all within 10% of each other. Injectors all seem to be 'nailing' quite a bit as the engine is loud at idle compared to another sdl. Stethoscope sounds as though its the injectors - it sounds like pennies hitting a steel plate hard.

Also am cleaning the pre-filter every 10 miles because of junk in the tank. Using Star-Tron to get rid of the fungus.

I cranked the car with the injectors out and attached to the lines and I didn't see any streams or 'peeing'. I think they were spraying ok but it was a little hard to tell because they were pointed down toward the cylinder - there was an instant cloud of diesel as the spray hit.

I know this isn't great data, but I'm just trying to see if it's worth the money to either (a) have them properly tested or (b) just cut to the chase and buy/install new nozzles or entire injectors. I plan to keep this car a long time.

Attached Thumbnails

   

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1986 300 SDL, gray on black, #14 head, 180K miles
1982 300 CD, silver on palomino, 290K+ miles [sold]
1980 300 SD, white on palomino, 500K+ miles when retired [uncle's car - inspiration for the above]