Page 1 of 1
Alternator or dynamo???
Posted: Thu Dec 18, 2014 11:16 am
by minidean
My mk3 cooper s came with an alternator when I bought it but I was unsure if this would have been the case?? I checked the John Parnell bible but can't find the answer. The car came off the production line in March 1971. Can anyone help?
Thanks
Re: Alternator or dynamo???
Posted: Thu Dec 18, 2014 11:22 am
by mk1
Dynamo would still be most likely, but Alternator is a possibility by 1971.
Re: Alternator or dynamo???
Posted: Thu Dec 18, 2014 1:30 pm
by surfblue63
Dean
Your engine number will tell you what your car originally had.
12H397 Cooper S Mk3 with dynamo, negative earth and EN16T Tuiftrided crankshaft
12H398 Cooper S Mk3 with alternator, negative earth and EN16T Tuftrided crankshaft
Info from here
http://www.retrominisltd.co.uk/index.ph ... page&id=12
Stuart
Re: Alternator or dynamo???
Posted: Thu Dec 18, 2014 2:03 pm
by mk1
That is a great little resource!
Re: Alternator or dynamo???
Posted: Thu Dec 18, 2014 2:27 pm
by LarryLebel
The first Lucas alternators had external rectifiers and voltage regulators. The next generation for a short period had internal regulation with a 5-pin connector and the last, and current kind, had 3-pin connectors. I'm going to guess a MkIII S had the 5-pin connector version.
Re: Alternator or dynamo???
Posted: Thu Dec 18, 2014 5:11 pm
by hanlminiman
surfblue63 wrote:Dean
Your engine number will tell you what your car originally had.
12H397 Cooper S Mk3 with dynamo, negative earth and EN16T Tuiftrided crankshaft
12H398 Cooper S Mk3 with alternator, negative earth and EN16T Tuftrided crankshaft
Stuart
My car was built in March 1971 with a 397 engine but when restored in 2004 we added an Alternator and upgraded loom.