From a quick study of the parts catalog, it appears that all cars that use an aux water pump use the same part. Can anyone verify if this is true, or true only for certain years?
I may be doing so junk yard prospecting,and want to know what cars I can look at for the aux water pump. Is there a quick way to test them in the junk yard to see if they are good?

Thanks

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags