JonnyD Posted October 22, 2023 Share Posted October 22, 2023 Hi there. Very new to the club and having just taken ownership of a 1987 Manta b GTE, I was disappointed to find that the alternator is not working. I cannot find anywhere that has one in stock. Has anyone had any success in this task? Thank you. Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted October 22, 2023 Share Posted October 22, 2023 I think @MrCarlos can probably help you with a good used one. 1 Quote Link to comment Share on other sites More sharing options...
1200bandit Posted October 22, 2023 Share Posted October 22, 2023 Get it reckoned will be cheaper than a new one Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted October 23, 2023 Share Posted October 23, 2023 (edited) there should be no problem finding one of these i would have thought. there are also a 55 amp version as fitted to some models (carlton 2.2 for example).which would be a slightly better option over the 45amp version . as mentioned there are places that can recon these too. usually its the regulator and / or noisy bearings that fail rather than the coils. if you buy one online make sure that the mounting points are offset to each other rather than diametrically opposite as this will be the wrong one (for later fwd stuff !) you will see what i mean if you google some pics. also just be sure yours is actually faulty beforehand. if thats an actual picture of your the connections look a little iffy ? the main positive lead looks a bit rusty and suspect on the lug. and check the small earth lead at the bottom to the bracket. Edited October 23, 2023 by cam.in.head 1 1 Quote Link to comment Share on other sites More sharing options...
JonnyD Posted October 30, 2023 Author Share Posted October 30, 2023 (edited) Thanks everyone. I got the existing one refurbished and recrimped that dodgy looking connection. now the car starts and doesn’t stall but voltage at alternator is 11.6-11.8V when running, 12.4 when off. can anyone confirm if it is possible that the alternator is 12 Volt and not 14 volt? Just keen to know if all is fixed to go out on the road with lights and wipers a need this time of year. thanks Edited October 30, 2023 by JonnyD Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted October 30, 2023 Share Posted October 30, 2023 Check volts at battery terminals when running. Quote Link to comment Share on other sites More sharing options...
JonnyD Posted October 31, 2023 Author Share Posted October 31, 2023 7 hours ago, Jessopia74 said: Check volts at battery terminals when running. Volts readings are same at alternator points and battery terminals. 1 Quote Link to comment Share on other sites More sharing options...
H-400 Posted October 31, 2023 Share Posted October 31, 2023 Should be around 14V, my opinion is that a Delco-Remy and Bosch (type) are the same build quality but the advantage of a Bosch type is you can change the voltage regulator with the brushes easy. they are fitted on the back of the alternator. To do this on a Delco Remy you'v got to open the body, and before closing the alternator you need to push the brushes in with a steel wire that you pull out after closing the alternator. If you don't do this the brushes will break. Maybe this happened when your alternator was refurbished... 2 Quote Link to comment Share on other sites More sharing options...
Jessopia74 Posted October 31, 2023 Share Posted October 31, 2023 9 hours ago, JonnyD said: Volts readings are same at alternator points and battery terminals. As H stated about readings, when running you should see min ~13.5v at battery terminals. it should not be under 12v as that means you’re draining the battery. I would go into halfords/local garage/ service center etc and get them to put a proper battery tester on to check mate. or buy your own. Something like this is quick & dirty test; (obviously it’s not professional spec, so a trip to a friendly garage that will test for free is best) https://www.eurocarparts.com/p/streetwize-battery-and-alternator-tester-549778961?type=shopping&gclid=Cj0KCQjwy4KqBhD0ARIsAEbCt6hUaEHRBqTLxzNPJZzd90nCnHkx2QQkjpRo91QzQA_n9FVlJBgD7MkaAq3qEALw_wcB 3 Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted October 31, 2023 Share Posted October 31, 2023 yes it sounds like you still have issues and possibly the alternator wasnt faulty to begin with ?( or they havnt fixed it !) check that the earth leads are good. small one on alternator,big one on engine to chassis. wiring wise theres not much else that could be at fault.main positive lead and blue/white to warning light. check that the dashboard warning light is present and working correct. should be glowing bright with ign on and go out completely with engine running. sorry if im stating the obvious here ! at idle voltage may well be under 12v but this must increase to around 14v when you raise the revs. if this isnt the case and you are sure its all wired up soundly then the alternator must still be faulty. 1 Quote Link to comment Share on other sites More sharing options...
JonnyD Posted October 31, 2023 Author Share Posted October 31, 2023 Thank you for this info. Better to state the obvious at all times as I am definitely always learning Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted October 31, 2023 Share Posted October 31, 2023 and looking at the pics the connection still looks poor but probably the canera angle/reflection. is it a new lug ? Quote Link to comment Share on other sites More sharing options...
JonnyD Posted November 13, 2023 Author Share Posted November 13, 2023 Recrimped the earth as there was a little tear in the sheathing. Put it back together and alternator now working perfect. Output about 14.7 volts. Thanks all 2 Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted November 13, 2023 Share Posted November 13, 2023 hi. wouldnt want to question your work and as you say you are still learning but any damage on the sheathing wouldnt affect the connection as such so if it were me i would replace the short earth lead completely and also relug the main one just to be sure. it may be that there WAS a bad earth connection and moving it or crimping it has temporarily solved it. like i say im not critsising your work just trying to help with a more permanent fix. all the best . Quote Link to comment Share on other sites More sharing options...
JonnyD Posted November 13, 2023 Author Share Posted November 13, 2023 Relugged all connections from battery connection through all. thanks for the info. As I did all this before testing, I made more than one change before testing, so could have been either. 1 Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted November 14, 2023 Share Posted November 14, 2023 great ,glad its solved now anyway. Quote Link to comment Share on other sites More sharing options...
®evo03 Posted January 8 Share Posted January 8 On 31/10/2023 at 13:15, H-400 said: To do this on a Delco Remy you've got to open the body, and before closing the alternator you need to push the brushes in with a steel wire that you pull out after closing the alternator. If you don't do this the brushes will break. Maybe this happened when your alternator was refurbished... Any parts listing for brushes and Regulator for these, Delco Remy Alt. Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted January 8 Share Posted January 8 last time i got one ( couple of years ago) they were plenty available on ebay. its a pretty common and long serving design . 1 Quote Link to comment Share on other sites More sharing options...
®evo03 Posted January 8 Share Posted January 8 Is there a part NR. For alternator or repair service kit. ? Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted January 8 Share Posted January 8 just had a look. still in abundance on ebay. delco 10si model type. 1 Quote Link to comment Share on other sites More sharing options...
®evo03 Posted January 9 Share Posted January 9 Thanks, allows me to search parts also. Not that hard to repair, just need to remember the paper clip. Plenty of vids on YouTube to show how to test each component. 👍 But will price on new on Autodoc Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted January 10 Share Posted January 10 all part of the fun . and all easy to test . usually its the regulator or less common a faulty rectifier block . some models have a resistor bolted to the regulator ( not quite sure the advantage of this ) but i do know that they can be quite srnsitive to the ign lamp wattage and some dont work at all if the lamp is blown or disconnected ! Quote Link to comment Share on other sites More sharing options...
®evo03 Posted January 10 Share Posted January 10 Tested when car is running, just holding 12v with no drain, and gauge is 12v won't rise. If you put a drain on, headlights, gauge drop half way. Will swap out to a spare alt, and rebuild the original, found a eBay shop that supplies parts for rebuild, just need to supply them with part number. They supply Reg. Rect. Resistors, As I think it's a Chevy shares the same, and they rebuild the originals as the remanufactured casing are different. Apparently. I will post links when sorted. Might give it to a company to rebuild, as I have a specialist in town alternator, parts and beer tokens.👍 Quote Link to comment Share on other sites More sharing options...
cam.in.head Posted January 10 Share Posted January 10 yeah its a simple enough design. and a simple enough charging/ wiring setup. check terminal lugs etc whilst you have it off and ensure that batt light does work if you hold the blue/ white wire to earth. should read around 14 on guage and definately hold it at 12 or above with loading so does sound like an issue somewhere. 1 Quote Link to comment Share on other sites More sharing options...
®evo03 Posted January 11 Share Posted January 11 (edited) Ok, spare alternator fitted, had to make a mini loom to connect the double plug, battery and light terminal, as I didn't want to mess with the original double plug on car loom. Good news the spare alternator sitting under a bench for approx 20yrs works. Will strip original alternator and clean and try again, as it is pretty grubby, and terminals are loose inside, further investigation needed, but dinner, TV and drinks later on, damn cold here tonight, so indoors it is. Is there a rubber missing from middle slot? Or maybe credit card slot 😂 Edited January 21 by ®evo03 Quote Link to comment Share on other sites More sharing options...
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