tech question to those that might know.

[richardJr]

I have a alternator issue and was wondering if I could
"make work" a 68 mgb alternator in a 71mgb gt. The problem being simply is they are two different breed of cats...one with and one without an internal voltage regulator. I was thinking maybe...(praying to the lucas lord) ..could I just swap the brush box and get the connections correct (5 terminal type connector) plus add the internal voltage regulator along with changing the plastic case so I can actually plug it in? My real question is about the rectifier...are they the same being they are both a 34 amp system? I did check part numbers for each rectifier and they are indeed different. Not that I am a cheap person...just that this alternator is starring me in the face and I look at it and see all the new windings and internals...like to use it if I could. For those that want to give me a hand...
In 1968 alternator Part 23548 (34amp) became a standard fitment with an external voltage regulator. In 1969 Part 23716 (34amp) was introduced incorporating an internal voltage regulator with a 5 terminal type connector. In 1972-73 saw the introduction of a newer style alternator Part 23804 & 23748 (both 34 amp) with a simplified 3 terminal connector plug Part 54960402, this continued thru mid- 1974. At this time yet another style of alternator was introduced Part 23756 (A1816 43 amp) with a different connector plug assembly. This alternator fitment continued into 1978 thru ID number 471000. From ID number 471001, yet another alternator was introduced Part 23737 (A1812 43 amp) using Part 54960402 style connector plug.

And of course I need the 23716 but have the 23548. If it can't be done...I have one for sale! It would fit a 68 mgb very well.
Thank you all who reads...and I wish upon you all a very happy day.

 

[Dave Russell]

And a very happy day to you also. I have no idea about your alternator question, but surely someone here knows. If no one jumps in, I will try to help.
D

 

[Steve]

Outside of my realm of experience too, just bumping to the top again, make it more visible. Good luck.

 

[BCruzn]

Richard, Hi, where did you get your present new alt.? I've just replaced mine, and come to find out there where two different alts. put on 70 B's that year, all I did was to take my old alt. to O'Rielys, said I need one of these and he brought out a rebuilt Lucas, an exact match. I also spoke with Bob Ford at Brit-Tek. He stated that altho' a number of alts. where put on B's in 70', if they have the five connections, go for it. You can also refit your B with a Delco three connection alt. Go to MG enthusiast for details (in the archives). LOL /ubbthreads/images/graemlins/hammer.gif