SW20 Battery

Re: SW20 Battery (TwoDogs)

Fri, 22 Dec 2017 11:52:25 GMT

Just been told that J bolts of different lengths should be available at places lie Repco.
Presumably solved.

Re: SW20 Battery (TwoDogs)

Fri, 22 Dec 2017 09:32:15 GMT

Good point - had not considered the voltage drop.
New question: (if I can insert a photo)....hmm asks for a URL, but my photo is on the C:drive...??

The braces that hold the battery in place use a longish j-bolt with a nut on top.
Unfortunately that bolt does not reach either of the 2 holes in the bodywork, behind the battery.
I suspect that something attaches to those holes and extends 20 or 30mm vertically, which the j-bolt then
hooks onto. I can't find a picture or part number to order it.
I should ask Josh if he has one.. or maybe just make something to fit....

Re: SW20 Battery (5SGTE)

Fri, 22 Dec 2017 09:15:36 GMT

Might be 15.1 alt output but lower once in makes it way through 4m of cable...

Re: SW20 Battery (TwoDogs)

Thu, 21 Dec 2017 10:20:15 GMT

I'm sure you are right. Talking about it with a more experienced car lover, he suggested the high readings that I am seeing (14.8v, 14.9v) is because my battery is flagging, and that with a new battery, the numbers could well come down to low 14s.
About the BGB saying 15.1v he was a little surprised, but suggested it is likely to be a very short-term condition.
I will still talk to an auto-electrician about this, for better understanding. I'll post here any salient points.

Re: SW20 Battery (Mrskylighter)

Thu, 21 Dec 2017 10:12:12 GMT

Will be interesting to see what the voltage is once you change to a new battery. I'm thinking it will come down a little to around 14.5v

Let us know how you go with your investigation into the 15.1v maximum mentioned in the BGB. Maybe you could check a few other Toyota model manuals from the same era or international SW20 BGBs?

Re: SW20 Battery (TwoDogs)

Thu, 21 Dec 2017 09:29:48 GMT

Yep, I will get a new battery, but you miss the point about the BGB saying 15.1v. It has nothing to do with me, or my car or my meter. It is your car. Unwanted heat going into every component in the car, including the battery and that shortens the life of those components. I will also raise this with an auto-electrician to see what he says.
It MAY be a BGB error (wouldn't be the first).

Re: SW20 Battery (Mrskylighter)

Wed, 20 Dec 2017 23:48:07 GMT

TwoDogs
Hi Skylighter,
all my readings may be out because the battery needs replacing, or my multimeter is cheap, but how can Toyota suggest 15.1v is normal when (it seems) everyone else is saying 14.5 should be the max into whatever battery (and components around the car)?

I don't know man. Toyota would have a good idea as they designed the car. I've never seen 15.1v in any of my cars though.

Sounds like you need a new battery anyway so maybe go ahead and replace it with the correct one and see what the Alt is putting out afterwards? If it's still too high investigate further.

Maybe test your voltmeter on something with a known DC voltage like a newish 9v battery or friends car battery?

Re: SW20 Battery (5SGTE)

Wed, 20 Dec 2017 23:37:02 GMT

Does the bgb suggest 15.1 at the alt or batt?

Re: SW20 Battery (TwoDogs)

Wed, 20 Dec 2017 23:11:56 GMT

Hi Skylighter,
all my readings may be out because the battery needs replacing, or my multimeter is cheap, but how can Toyota suggest 15.1v is normal when (it seems) everyone else is saying 14.5 should be the max into whatever battery (and components around the car)?

Re: SW20 Battery (Mrskylighter)

Wed, 20 Dec 2017 21:20:27 GMT

The failing battery may be the reason for the higher voltage you are seeing at the terminals? Do you have a spare battery you can temporarily hook up to test this?

Re: SW20 Battery (TwoDogs)

Wed, 20 Dec 2017 20:11:12 GMT

Scandal !!! I decided that before I buy a battery, maybe I should check it, and the charging system, and my knowledge of alternators and regulators. Following instructions found on the interweb, we measured the voltage
at the battery, disconnected, connected, lights on, then with starter motor load, then idling, then at 2500rpm, then
added lights, indicators,radio. The results ? Well when the engine is not running, the voltage drops such that I need a new battery. (No scandal there), when the engine is running my multimeter says with load or not ...around 14.8v.
All the interweb hits say your suppy needs to be regulated between 13.5 - 14.5v and outside that range means NEW regulator (if too high) or possible heat/damage to electrical components, or NEW alternator (if too low). Fine, I'll get a new regulator. I open up the BGB to find out where the regulator is (on the alternator) but SCANDAL !! ...it says Normal is u[p to 15.1v !!!! every generic doc I had read was saying that over 14.7,say, would shorten the battery's life.
So I searched and there are some hits for SW20, 15.1v and BGB.... but none when I add "mistake".
Has anyone noticed this before ? My multimeter may be out, but the documentation is generic for all cars!
and more importantly, batteries.

Re: SW20 Battery (Carmikey)

Fri, 15 Dec 2017 08:45:01 GMT

Reddtarga
Whatever you fit make sure you keep it charged up if you want it to last.

Yeah a trickle charger is a must!

Sent from my SM-J320ZN using Tapatalk

Re: SW20 Battery (Reddtarga)

Fri, 15 Dec 2017 00:02:19 GMT

I also run the Century NS 60, and it works fine.
Whatever you fit make sure you keep it charged up if you want it to last.

Re: SW20 Battery (sx_corolla)

Thu, 14 Dec 2017 23:47:16 GMT

I just changed mine to an Exide Extreme X55D23CMF which is really good. No maintenance, good capacity and CCA. Its bigger than what's recommended (NS60 which i believe should be for the AW11) but fits nicely into the SW20 battery tray with stock battery clamp.

Last Battery was Century Yuasa which i would avoid like the plague. Failed on me within a year and warranty wasn't honored as they stated it was normal wear and tear. Really poor

Re: SW20 Battery (5SGTE)

Wed, 13 Dec 2017 21:33:19 GMT

It's fine, I run that batt. It's actually pretty good cca for the size. 7.5yrs out of my last one (century).