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Post Info TOPIC: Alternators


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Alternators


Irritating alternator failure this week, duff diode pack draining the battery.

Shame, it's a really neat little unit, leaves loads of space for the exhaust tubes.

However, this leads to an interesting discovery.

On the left, Nippondenso unit, Cambridge Motorsport 40A £££, on the right, Car Builder Solutions, same 40A, made in China for Bosch £98.

16189343661292024245434.jpg

 

1618934691273-1858794067.jpg

But of a no-brainer that one.

F



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16189380598671630753653.jpgFits a real treat..



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Well spotted, Frank.
I use CBS a lot. Excellent service.

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Rust Never Sleeps - Cavity Wax and Valium Should Do It


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funny I was only thinking about this yesterday!

I have (I think) no4 alternator fitted to mine, its the smallest "standard type" alternator I could find and has lasted well(that's torn it!) 

its very short in the length but about standard in dia. I'll get a pic of it...but not in situ as I've blown the whole engine bay/trans apart doh

does this one fit the "usual brackets" you can get of Alternator up grade?

 



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It's a 2 bolt fix, so upper fix on the standard sliding tensioner bracket, lower 9/16 bolt fix to the standard engine plate with a spacer.

3 connections, 10mms bolt to battery, field activation from ign and warning light terminals on a T format plug.  No ammeter.

Basically it's tiny, about the size of a pint mug, loads of air space to exhaust, and 40A is plenty, better than a 22A dynamo.

As it's a nippondenso copy, spare diode packs and voltage regulators on ebay.

F



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Most of the times the voltage regulators give up due to heat.
The alternator is still ok then.

Almost common practice on the Lotus Elise to.
A good fix for the Elise is to take the voltage regulator off the alternator and mount it remote at a cooler place.

Off course with appropriate wiring.

 



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I'll have a look at remote mounting the regulator Eric.  I just need to find a cool place!

If you have killed the voltage regulator, either with heat, (or by dropping a spanner when you took the exhaust off......)

 

Replacement regulators are £22.75, free delivery on ebay.  You need a Nippondenso D2 126000-1160.

The Chinese alternator seems to be a direct copy of the nippondenso unit so spares should be interchangeable.

Careful though, there are a lot of similar looking but not identical alternators on lawnmowers, forklifts and tractors.

F



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Frank, just had a quick look at these after our chat at the silverstone gig the other weekend. Is this one ?

https://www.carbuilder.com/us/compact-lightweight-40-amp-alternator

 

if so would this be the correct spare regulator to carry or fit "in a cooler place confuse)

https://www.ebay.co.uk/itm/273745919184?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338703917&toolid=20006&customid=s%3AGS%3Bpt%3A0%3Bd%3AD%3Bsi%3A2045%3Bct%3A%3Bad%3A%3Bii%3A273745919184%3Bpr%3A%3Bcd%3A%3Bgc%3ACjwKCAjwhdWkBhBZEiwA1ibLmEl5PEIWpVNLq-VTCRl_hq8CiKoXnLeRkVd9p9iRCLQvOxY10u6SlxoCJ90QAvD_BwE&_trkparms=ispr%3D1&amdata=enc%3A1hzCD5pNeR7iUS3Upmp-fTQ41

 

 



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The car builder one is OK, it's a Chinese unit, badged Bosch.

The regulator connector looks wrong, my terminals are in a T shape.

Make sure you put an insulated cap on the power terminal, it's a bit sensitive to dropped spanners.

F



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