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RichiRich
Suzuka


Joined: 23 Sep 2009
Posts: 1011
Location: Luxembourg


PostPosted: Sun Jan 20, 2019 4:21 pm    Post subject: Help please - battery problems Reply with quote

Ok, so I didn't get to drive my 996 Turbo as much as I wanted or should have last year Surprised. I parked it up over the winter in my garage, because I don't have any winter tyres for it - which are compulsory here in Luxembourg.

I remembered to charge it a couple of times, and roll it on the tyres a bit, but forgot for a while and now the battery is dead. Fortunately, I left the bonnet open (with the lamp disconnected, before any of you point it out).

I tried to charge it, but the charger reads 14.6V for a few seconds and then goes down to ~3.0V and refuses to charge it. Is the battery dead, or do I need a special charger?

I tried a few times to turn the charger on and off and eventually got the battery to nearly 4.0V, at which point the alarm started to sound and drained the battery dead again.

I have no clue when the battery was last replaced. Is there a way I can tell how old it is? Do I just need a new battery? If so, which one (brand
/ type / part#) should I get?
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2000 996 Turbo
Speed Yellow / Black

Ex - 2003 996 Carrera 4S
Ex - 1992 964 Turbo X33 (#777)
 
  
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Magic919
Österreich


Joined: 05 Jun 2013
Posts: 971
Location: Berkshire


PostPosted: Sun Jan 20, 2019 4:47 pm    Post subject: Reply with quote

They often carry the date of manufacture.

Bosch S5 or equivalent would be my suggestion for a replacement.
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asterix_the_gaul
Suzuka


Joined: 20 Dec 2008
Posts: 1193
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Sun Jan 20, 2019 5:36 pm    Post subject: Reply with quote

You have probably killed the battery, 6 years is not bad though, I would just pick up a new one and remember to keep it on trickle charge next time you lay up for winter
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1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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Kingb4
Spa-Francorchamps


Joined: 20 Jan 2018
Posts: 303
Location: Beds/Bucks


PostPosted: Sun Jan 20, 2019 7:24 pm    Post subject: Reply with quote

Am afraid it sounds dead to me.

As a general rule, if the voltage on a car battery is less than 12v its probably knackered (some people say below 12.1v).

Lead-acid batteries aren't engineered to handle being left discharged.
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RichiRich
Suzuka


Joined: 23 Sep 2009
Posts: 1011
Location: Luxembourg


PostPosted: Sun Jan 20, 2019 7:37 pm    Post subject: Reply with quote

Thanks all. I had a feeling I would have to buy a new one.

I also heard that Bosch are the way to go - S4 010 or S5 010?

Being that it's dead and I can't take it to a garage to change, how much risk is there to doing myself? I've read a load of caution messages, so how risky is it?
_________________
2000 996 Turbo
Speed Yellow / Black

Ex - 2003 996 Carrera 4S
Ex - 1992 964 Turbo X33 (#777)
 
  
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asterix_the_gaul
Suzuka


Joined: 20 Dec 2008
Posts: 1193
Location: Cheshire

1999 Porsche 996 Carrera 2

PostPosted: Sun Jan 20, 2019 7:44 pm    Post subject: Reply with quote

Very easy to change, you need a 10mm socket for the terminals and 13mm for the battery clamp. Make sure you reconnect the terminals the right way round and the little vent tube on the side
Watch you tube video's, seeing it done makes all the difference..
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1992 944 S2 Cabriolet, Cobalt Blue/Classic grey -gone!
1995 993 C2 Cabriolet, Midnight Blue/Marble grey -gone!
1999 996 C2 Coupe, Ocean Blue/Graphite grey
2002 E46 M3 Cabriolet, Laguna seca blue/LSB
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5945
Location: Brighton


PostPosted: Sun Jan 20, 2019 8:08 pm    Post subject: Reply with quote

As with any battery disconnect .. you undo the negative terminal first , so on a RHD car the o/s lead , then the positive , remove the battery clamp , 13 mm bolt.

996 and you need to have the key in the ignition and in the ignition on position .. alarm wil sound when fitting or removeing if not .

Pull out the vent tube if fitted .

I then put a towel in the boot , i climb in and i lift the battery up and onto the panel .. i then lift it out ot the car .

Be aware .. our backs are not designed to lean over and try and lift these out so the above is the best way .

10mm spanner for the lead nuts .

As mentioned above .. your battery is probably dead hence it wont charge .

After replacement , reset the windows .. close and hold the window switch in the up position for 5 seconds , input radio code if needed .

Also .. turn on the ignition but dont start the car for 30 seconds and dont touch the throttle pedal .. it resets .

EDIT ..

I will also add and just to be safe .. wear glasses or safety goggles .. not really needed but i prefer to say the safe way of doing things .
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RichiRich
Suzuka


Joined: 23 Sep 2009
Posts: 1011
Location: Luxembourg


PostPosted: Mon Jan 21, 2019 9:01 am    Post subject: Reply with quote

Thanks all, I'll give it a go.
_________________
2000 996 Turbo
Speed Yellow / Black

Ex - 2003 996 Carrera 4S
Ex - 1992 964 Turbo X33 (#777)
 
  
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