For some reason, I cannot open my attachment (too large a file?).


Yes, the new version is on the left, and it is a sealed unit, according to the MB parts guy. Note that the new part does not have the cap that holds the spring and ball bearing in place. When you read the manual, many pumps have a relief valve, so that when you prime them, they will let any air (fuel?) out. If it is not sealed mechanically, you have a large bearing at the end, with the spring pushing both bearings apart. It could be the four times greater mass of this outer bearing keeps it from leaking. Remember, the small inner bearing will only give way when there is enough pressure, and when that happens, the fuel will flow through the hole on the side of the valve into the clear line. I will let you know the results when I hopefully get the engine started


I am still suspicious of the copper washers interacting with the IP (which looks like steel) and the filter housing, which could be aluminum. I know that connecting a heavy copper fitting to steel pipe will not be a problem for a long time, but connecting steel to thin copper pipe can be a problem, and these copper washers are thin, about 1 mm. I have seen this when I re-plumbed my boiler and many of the pipes which were copper, steel and cast iron.


With regard to geazzers spring, I think it was for a 300D turbo, and never found out if he had one for a 240D.


I am getting a quote on some aluminum washers, and will relay the results. All of my washers are original and they are all silver on all three of the clear lines. When I bought the clear line that goes to the fuel pump body (where the primer pump is), there was a note on a tag to use silver washers.


BTW, THE PART NUMBER THAT I GAVE FOR THE VALVE IS A BOSCH NUMBER. THE NUMBER FOR MERCEDES SHOULD BE A 000 074 72 84. I am assuming that this part will work on any pump with a clear fuel line to the BACKSIDE of the IP. And, as I said, I will put up the results.

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1983 240D low miles 156000, and yes, MB still gives out badges