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Buddsy

Alternator

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I got an alternator for my Turbo Esprit, it looks a bit dirty and I was going to swap it for a recon, but as cash is a bit tight I was wonering if I could check it out and what, if any the common faults ware with alternators? I want to fit this all up before I refit my engine into the car. Im guessing the bearings could be one thing but mine feel ok. Maybe the coils could break down? Can I check these with a volt meter or should I rig it up to a motor to see if it gives a charge? Are they prone to breaking or is this one of those things that just keeps working?

Thanks ina advance of any comments

Buddsy


 

"Belief is the enemy of knowing" - Crrow777

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Alternator problems are usually brushes wearing out, bearings or failed diodes. Coil windings can fail, but the normal problems are diodes and brushes. Testing alternators really needs specialist kit...automotive electrical specialists will usually have test rigs which enable them to see whether the alternator works and produces it's specified output. Easiest thing would be to get a shop to test it...or else, fit it to an engine and check the voltage it gives across the battery...13.8 to 14.4 volts from memory..shouldn't go higher or else you'll boil the battery, volts should reduce as the charge level in the battery rises. Alternators are pretty reliable things, and changing them in situ isn't too horrible, so not that much of a problem even if they do fail. Used to be able to get kits to repair them, new sets of brushes etc. but it's a fiddly job to do and the brushes break very easily during the process. All alternators tend to get dirty externally, quite quickly,so a bit of grot on the outside isn't really a guide to the internal workings..they're a zero maintenance item in normal use.


Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein

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If it was me, I'd fit it to the car and see what it did....I'd say it would probably be OK, and


Scientists investigate that which already is; Engineers create that which has never been." - Albert Einstein

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I agree - just fit it. Its not difficult to change in situ, but you do need to remove the plenum to remove the long pivot stud. NB I only ever use grease as gasket 'cement' on the plenum gasket, fully gas tight, but allows gasket to be re-used.

cheers Steve

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Ok will probably do that, give it a clean up and wack it back on. When I helped Andy Clements fit the alternator into Simonfs car last weekend there was a small hole drilled in the rear bulkhead to allow the screw to come out and I think there is a similar hole in my car too.


 

"Belief is the enemy of knowing" - Crrow777

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