The metallic pings may have been the beginning of the noise.

Stuff does get loud under the hood, due to hollowed engine cavities and the acoustics of the engine bay. Something really minor can sound like a major player.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

Ooo, thank you. That makes me very happy, although I will try not to get my hopes to high or low.

EDIT:

I feel sorta stupid for not adding this earlier, but last night I did drive the car a short distance after the appearance of this noise. I did not notice the sound in operation, only at idle or very close to idle. I mean to say that the car sounds fine going down the road. I recognize driving it that short distance was an error in judgment.

And also, like I said earlier, I am hesitant to even start it but I recognize that I very well may have to.

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1984 300D Turbo.