Questions and Answers
Mini Cooper Charging Problem
Q. Dear Sir: I'm an owner of a 1969 Mini Cooper with a 0.998cc engine. I recently installed a Nippondenso alternator in the place of the worn out stock alternator. This Japanese alternator came from a Daihatsu Minivan (in fact, it is the smallest alternator I've ever seen.)
I also installed an ampere gauge to be able to monitor the current flow. Having done all that, I tested the electrical system by opening all the lights; the pointer of the ampere gauge will move to the discharge section of the gauge and if I revved the engine it will move to the charge section of the gauge.
The problem is that after I have driven the car for quite a long time, the battery losses its power and it won't be able to crank the engine the next time I start the car. Please help me identify the problem of my car.
Thank you,
Mc ClementA. It sounds like the replacement alternator is no powerful enough to replace what the car is using. Alternators are rated as to their output. If you car needs a 60 amp alternator and you put in a 40 amp alternator, after time the battery will die because the alternator can't keep up with consumption.
I would check what the old alternator is rated at and make sure the replacement is rated at least that, if not more. If it is less, you'll need to replace it with one of the proper rating.
Additional Information provided courtesy of ALLDATA
