Member Since: 05 Oct 2008
Location: North East
Posts: 149
Chalky White Powder around battery tie down bracket??
Guys - either someone has left some Colmbian marching powder in there!..... or there's some sort of corrosion/reaction going on in my battery compartment!
I opened up the battery compartment the other day for the first time on the 05 (disconnecting the battery to try and clear the fault memory in an attempt to get the Fuel Burning heater going - and Epic Fail...again).
Anyway - under the bracket/strap that holds down the battery there was a significant deposit of white chalky powdery stuff - I havent poked around too much as yet.
Is this just a normal deposit created by oxidation/reaction/corrosion of different metals meeting - or might I have a battery leak of some sort?? (Have'nt had any battery electric problems? (Yet!)
thanks!
15th Jan 2009 9:41 pm
mick
Member Since: 21 Jan 2007
Location: Yorkshire
Posts: 2049
Used to clean that stuff off with boiling water but dont suppose you can do that on the D3 clean it as best you can and then grease it.
i had that went to the dealer and they put me a new battery onHome of RLD Hidden winch mounts Spare wheel Locks Trailer Body Fabrication [email protected] D3/4 sump plates MY 14 sump plates and the Discovery Sport wheel protectors Discovery 5 wheel locks
more Helsport tents and other things for camping Law of Mechanical Repair:
"After your hands are coated with grease, your nose will begin to itch and you'll have to pee!"
15th Jan 2009 9:53 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
Hi dealmaker, this is a common occurrence with standard flooded wet cell type batteries. Gassing from the battery while it is charging causes a chemical reaction on certain surfaces and you get an oxide residue build up, your chalky white powered.
Even though your battery is sealed and it’s not all that common, it can still gas ( if it didn’t, it would explode ) and as yours has been untouched for so long, I don't think there is a problem.
Some hot water and a stiff brush will clean it up but you need to check your battery terminal clamps and the battery bracket bolts to make sure there is no corrosion on the terminals themselves or on the bolts.
After cleaning everything up, as you don’t go near your battery much, let it all dry and get yourself a can of lanolin spray and give the terminals and battery bracket and the bracket’s bolts a light coat.
You need to let everything dry for a few days before you take the D3 off road, so no dust sticks to the wet lanolin.2008 TDV8 RR Lux + 2009 D4 2.7
16th Jan 2009 2:08 am
stevo
Member Since: 25 Apr 2006
Location: north queensland
Posts: 107
one issue that the disco has in hot climates is that the sealed battery evaporates the water component out the breather tube which has its outlet directly above the computer housing. So while you are playing in there you might re-route this breather hose to a different area.Disco 4 Sept 09
16th Jan 2009 11:49 am
xtc
Member Since: 27 Mar 2007
Location: Hampshire
Posts: 1072
Is it PC to use the term 'Chalky White' ? Sounds a bit racist to me... Don't want to be gettting Martin into trouble Maybe 'Northern european with a dash of non-black white' would be OK?Off Roading is OK.... But I'd rather be Boating!
16th Jan 2009 5:34 pm
phurley
Member Since: 19 Aug 2007
Location: So. NH
Posts: 175
drivesafe wrote:
... this is a common occurrence with standard flooded wet cell type batteries. Gassing from the battery while it is charging causes a chemical reaction on certain surfaces and you get an oxide residue build up, your chalky white powered.
stevo wrote:
one issue that the disco has in hot climates is that the sealed battery evaporates the water component out the breather tube which has its outlet directly above the computer housing. So while you are playing in there you might re-route this breather hose to a different area.
2 more good reasons to get an AGM battery when replacing the original - no free gassing.
Seriously, corrosive gas where the ECM & TCM are housed?
16th Jan 2009 6:00 pm
drivesafe
Member Since: 23 Feb 2006
Location: Gold Coast, Australia
Posts: 867
phurley wrote:
2 more good reasons to get an AGM battery when replacing the original - no free gassing.
Hi phurley, not quite right, AGM batteries can also gas in the same type of situation and is the reason you must not mount an AGM battery up side down, you block the vents and instead of gas escaping, the battery’s electrolyte is forced out, stuffing the battery.
Cheers2008 TDV8 RR Lux + 2009 D4 2.7
16th Jan 2009 9:53 pm
phurley
Member Since: 19 Aug 2007
Location: So. NH
Posts: 175
Well, you're right, drivesafe - but, since the battery is pressurized, nearly of the gas produced in-battery is recombined back into water. Very little gas is vented (which is why Optimas don't have vent tube hookups). That's why I said free gassing.
16th Jan 2009 10:08 pm
caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
There have been some cases of the battery cracking at the terminal take the clamp off (after checking the 'P' light has gone out) and look for small crack.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
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Law of Mechanical Repair:
Sounds a bit racist to me... Don't want to be gettting Martin into trouble 
Maybe 'Northern european with a dash of non-black white' would be OK?
