The thing that concerns me is the bubbles seem to be coming from a compression leak. You can see a few bubbles in the picture right by the tip of the arrow (the car was running when the picture was taken). If I fix the fuel leak I still think that there will be a compression leak, you just wont be able to see it any more. Could a leaking return line cause bubbles in the area around the pre-chamber?

If it is a pre-chamber leak would it be less expensive to buy the specialized tools to remove the pre-chamber or take it to a mechanic to re-seat it?

Thanks again. -Bryan

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine