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Alternators and Starters


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CaptainK

Club Member

Mon 13 Nov 17 09:39

Alternators and Starters


Hi, me again. I seem to be posting a lot recently. Recommendations for both please - 1968 327 - and where to buy them from?

Alternator:
I don't think my alternator is charging 100% as the battery goes flat eventually (6 month old battery). No errors or warning dashboard lights etc. The battery gauge is halfway after engine start and slowly decreases to just above 0 after about 5 minutes. The belt is NOT slipping.
My alternator seems to have a separate regulator strapped to the body of the car next to the alternator (aka on the inside of the driver's side wing). At least I presume that is the separate regulator on earlier models? I'm guessing it is getting a bit hot and just gives up on life a bit.

Can I replace all this with a "modern" alternator that combines an internal regulator? How do I actually go about checking my alternator is ok? I checked the output on the alternator pins and it says 14volts with engine running. Less with engine off, obviously. Didn't check output from regulator though, should have thought of that before.

What amperage should I be looking for should I replace it?


Starter:
It occasionally has a sticky solenoid. Beat the solenoid case and it starts fine. The actual motor seems strong and does a good enough job. Though I am tempted to replace it all as it would be nice to have a more efficient starter as I'm guessing that as its old it must be drawing a lot of juice on start.


I had a quick look on the internet for both, and found varying prices from all over, with RockAuto coming in at about £30 ish per item (alt and starter), up to £120 ish per item. All from America though, so add on another arm and a leg to get it over here. I don't really know what brand or amperage to be going for, hence I'm posting here.


Thanks in advance, and apologies for my sudden spamming on here Very Happy

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kentvette

Club Member

Mon 13 Nov 17 10:13

Re: Alternators and Starters


CaptainK wrote (View Post):

Thanks in advance, and apologies for my sudden spamming on here Very Happy


That's just what the forum is for! Keep 'em coming!

Alas, I'm no expert on alternators or starters, so can't help you really. I did have the starter on our '78 rebuilt a long time ago, when it was suffering for the usual "heat-sink" issues. The rebuild included a new solenoid. The "reduction type" starters are popular with some people. Maybe have a word with Scott at Corvette Kingdom?


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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Redlevel

Club Member

Mon 13 Nov 17 10:42

Re: Alternators and Starters


Don't know if they are still around, but they did me an alternator years ago and its still good.. They do starters etc too.

alternatormart.co.uk

Hillmart UK Ltd
994 Astley Street
Dukinfield
Cheshire

enquiries @ alternatormart.co.uk

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Mick Howes

Club Member

Mon 13 Nov 17 10:58

Re: Alternators and Starters


Try Adi at ABM Automotive, he's a Corvette expert and deal with starters and alternators, really good, his tel no is 07831 812120, based in Weymouth.


--------------------
C4- ok now officially a convert!
www.mickhowes.freewebspace.com

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Daytona Vette

Club Member

Mon 13 Nov 17 14:30

Re: Alternators and Starters


Starter Motor good to go for a High Torque unit (smaller and more powerful) get a heat shield and if not a Heat Shield Blanket to stop it getting toasted by the heat from the exhaust manifold - the main reason for Starter Motor Failure on a C3

Try Scott at Corvette Kingdom or Tom at Claremont for advice / supply on both


--------------------
Barry - Daytona Vette

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CaptainK

Club Member

Mon 13 Nov 17 15:17


Thanks team. I'd not thought about refurbishing the existing units. But I do like the idea of high torque ones though..... as long as I can get a better output alternator to support it.

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Redlevel

Club Member

Mon 13 Nov 17 15:52

Re: Alternators and Starters


Its the battery that powers the starter, ..the alternator just keeps it charged.

A high torque starter shouldn't drain any more off your battery than a regular one would. Its the ratio of the windings that creates the higher torque, although I would imagine that being physicall smaller, those windings are of a lighter gauge and tightly packed.

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roscobbc

Committee Member

Mon 13 Nov 17 21:19

Re: Alternators and Starters


As good as the hi-torque mini-starters may be, they are not always a straightforward bolt-on. Without the 'nose' bearing that supports the end of the commutator shaft on a conventional starter, protruding through the starter aperture in to the bellhousing it's very important to shim the new starter for the correct tooth clearance. Failure to do this correctly can mean even bigger issues than you started with..........


--------------------
CCCUK Chairman
'68 coupe - 4 speed - 3.08 - 489 cu in - 570 bhp @ 5850 rpm - 606 ft/lbs torque (821 Newton Metres) @ 3850 rpm
Image

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CaptainK

Club Member

Tue 14 Nov 17 10:27

Re: Alternators and Starters


stevel98 wrote (View Post):Its the battery that powers the starter, ..the alternator just keeps it charged.
Yeah, I was just "typing short" to mean that "an efficient starter would be better as then I'd lose less battery power when I stop and start it and thus wouldn't need to get a better rated alternator that could charge it quicker (whilst running the engine and other stuff) when I'm driving."

I don't do a lot of journeys in it, and I'm guessing my alternator is a bit weedy. I've taken to charging the battery manually now when I've not used the car in a while.

roscobbc - thanks for the details on the starters etc. I'm actually quite tempted to have my starter and alternator rebuilt now as I've found a place not too far from me that says they rebuild BOTH. Gotta be worth a punt?

Does anyone have any ideas on a heat shield for the starter when I get it fixed? It'd be really nice if there was something purchasable and easy to fit that even a reasonably novice DIY person like me could fit. Smile

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kentvette

Club Member

Tue 14 Nov 17 11:29

Re: Alternators and Starters


There are a few options for heat shields. One is a "blanket" that fits around the starter, the other is a metal screen type. Some photos attached.

Following on from advice from Chris Sale, I recently made a rather nice (even if I do say so myself!) heat shield for the steering box on our '78, using aluminium and heat reflecting covering. Even for me it was almost easy, so I wouldn't mind betting that you could "knock-up" a shield type thing like the one shown.

However, I have not put a shield on the starter since we had it rebuilt. There was some discussion as to whether a shield actually held heat in (particularly the blanket type). Note that the heats-sink issues occur after the engine is stopped for a while, typically about the time it takes to re-fuel at a petrol station! After about 10 -15 minutes it will have cooled enough to allow a re-start. Without wishing to tempt fate, we have been OK without one for the last 17 years!


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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