So I have decided to rebuild the vac pump on both my 240's and have come across a choice of kits.
There is the main kit of which there is only 1 to choose but the remaining diaphragm fix kits are slightly different.
1 kit has 1 diaphragm and replacement bolts
The other kit has 2 diaphragms and no bolts.
The parts house says some pumps take 2 diaphragms but could not say how to know from external inspection.
I checked my engine #'s but that is no help.
Anyone know how to determine short of a teardown?
From what I can figure out both cars use the same pump.

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1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily