Ummm .... and how does one validate that the pump elements on a used pump haven't been disturbed since last setup, exactly?

And I get that a drip test will probably not out-perform four figures worth of service, by a professional on a six figure test stand.

However, that is not the question. I'll try to re-state it more clearly:

On my 616, can I expect to restore its present performance by carefully aligning the elements using the drip method?

Here's an observation: The Factory, in volume 1, suggests that one should check the drip on port #4, validating whether the pump needs service.



So, if I check all four, and they are closely matched to an accurately projected set of timing marks:
can I make the reverse inference --- plausibly infer that the pump can be restored to previous service levels?

__________________
--frankb

1982 300TD 617.912 <NLA> . 1975 2002 E10-EFI . 1976 914c6 . 1983 MG LMIII <NLA>. 1988 Montero / 616<NLA> . 2001 TLS . 2005 Saab 9-5 Wagon