2002 W203 C220 CDI I have a substance resembling diesel, emitting an odour, boiling at the base of injector number two. No leaks detected in the fuel lines or return; all other injectors are functioning properly, and the injector is dry.There is neither the Black Death nor mist, only bubbling.
Any suggestions regarding what this indicates? I believed copper sealing would prevent the escape of burned gases.
Injector issue
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PaulTaylor90
- Newbie
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- Joined: Tue Nov 04, 2025 11:50 pm
I would recommend a copper seal. If it has only recently commenced, there will be no black death until the bubbling derv is heated to the head.
I have never observed bubbling without spitting; it typically produces a spitting sound reminiscent of Thomas the Tank Engine. Observe, "Oh, it is entirely black."It is scheduled for Saturday to address the seal, new bolt, and thread cleaning. I was apprehensive that the injector was malfunctioning, but I could not discern any issues. I attempted to download the video during its technical assessment.
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RogerSalesCar
- Moderator
- Posts: 103
- Joined: Sat Aug 24, 2019 10:25 pm
The nozzle holder/retaining nut is fractured.