D24 vaccum pump rattle 940 disiel td

[leonard douglas]

after many months of fearing for the life of the turbo disiel 2.3 (vW/auidi) in my 940 estate i finally have got advice that it is the vaccum pump that is making the rattle in my engine.
this rattle goes away when i pump the break or disconnect the tube to the engine recirculating valve.

i understand there is a spring inside here that can break and cause such a rattle.

any one had this problem , is the solution replacement or repair , , would this cause puffs of black smoke only when i accelerate ( more than before)because the recirculation valve isnt functioning properly?

finally does anyone have or know where i could find a diagram or the vaccum pump system ,

thanks