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Misidentified part

Posted: Sun Jul 26, 2009 5:48 pm
by John Harley
Hi all

I recently bought an Echlin VR57 voltage regulator for my 1950 Eight-(Delco System) I was told by the friendly man that this was a substitute for the VR56. IT IS NOT. It is negative ground, not the required positive ground. This was a contribution to the charging problems I had on the way to Warren.


John Harley

Re: Misidentified part

Posted: Sat Aug 01, 2009 2:38 pm
by pacbrakeman
John, According to my 1957 NAPA parts guide and my 1967 NAPA Echlin Ignition catalog, VR57 is the correct voltage regulator. The VR56 was never used for Packard.

Re: Misidentified part

Posted: Sat Aug 01, 2009 2:56 pm
by Dave Czirr
Pacbrakeman, thanks for the follow-up on this. I've just checked my NAPA catalog and it agrees with yours, VR57 is the correct unit for John's 1950 Delco equipped car. I saw the unit he had, and it was marked in ink on the base stamping with a series of #s followed by "NEG" which leads me to believe he got the correct box from NAPA but the wrong unit inside.