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Model specific boards => Golf mk3 => Topic started by: Dan_GTi8v on 01 September 2011, 13:53

Title: How important is battery ventilation?
Post by: Dan_GTi8v on 01 September 2011, 13:53
I'm expecting to get a lot of 'duh' type responces, but basically I'm wanting to move my battery to the boot and have read a lot of guides where ther battery has no kind of ventilation, just a battery tray or box bolted to the boot floor and wires rerouted

How important is it to vent the battery with holes in the floor or whatever? Is it dangerous to not have any?
Title: Re: How important is battery ventilation?
Post by: nikkiy9 on 01 September 2011, 14:16
Rally cars have them in the boot with no problems,
Title: Re: How important is battery ventilation?
Post by: Wayne on 01 September 2011, 16:12

How important is it to vent the battery with holes in the floor or whatever? Is it dangerous to not have any?


Very important, you need a sealed battery with a vent pipe to the outside.
Title: Re: How important is battery ventilation?
Post by: Leon27 on 01 September 2011, 16:27
As above. BMW's and some Mini's have them in the boot and they always have a vent pipe. The ones which haven't got them fitted leak out some sort of sulphuric powder which is acidic, one car had a rotten boot floor because it was ignored.

Generally a battery in an enclosed space will have one, a standard Mk3 wont because there's enough air circulation around it.
Title: Re: How important is battery ventilation?
Post by: GolfGTI8v on 01 September 2011, 17:37
hi dan,

Did you relocate ur header tank?

Title: Re: How important is battery ventilation?
Post by: Dan_GTi8v on 01 September 2011, 19:03
no didnt bother in the end engine bay is pretty much as it was when I first got it running, but after some recent electrical problems I've decided to move the battery at the same time when I sort all the other bits and pieces

when you say a vent pipe, is it literraly just a hole in the floor with a pipe running to the battery? where does the pipe need to go to, just into the battery box?
Title: Re: How important is battery ventilation?
Post by: F17BAD on 01 September 2011, 21:09
no need to relocate the battery matey

here is my set up

(http://img88.imageshack.us/img88/4169/imageyymn.jpg)
Title: Re: How important is battery ventilation?
Post by: trog_nfs on 01 September 2011, 21:14
no didnt bother in the end engine bay is pretty much as it was when I first got it running, but after some recent electrical problems I've decided to move the battery at the same time when I sort all the other bits and pieces

when you say a vent pipe, is it literraly just a hole in the floor with a pipe running to the battery? where does the pipe need to go to, just into the battery box?

On most maintenance-free batteries there is a small breather hole on the side near a top. Usually have a little plastic elbow to stick in it, then just run a tube to outside so it can vent to atmosphere.
Title: Re: How important is battery ventilation?
Post by: GolfGTI8v on 02 September 2011, 09:08
F17BAD,  thats a very clean conversion

Heres mine,  not as clean :undecided: but works well

(http://i805.photobucket.com/albums/yy339/AndyGolfGTI8v/andyoutgolf.jpg)
Title: Re: How important is battery ventilation?
Post by: Dan_GTi8v on 02 September 2011, 10:16
Mines looks sililar to yours but as my boost piping is routed a little differently it looks a lot messier on the battery side, I need to move something but just cant decide what, battery seems easiest but I dont fancy drilling holes in my boot floor :P

Kells' your engine bay makes me jelous whenever I see it lol, what did you use to mount the water and coolant bottles too did you make something up?
Title: Re: How important is battery ventilation?
Post by: GolfGTI8v on 02 September 2011, 10:35
Could you not cut the original header tank bracket and washer bottle bracket and move the the other side & weld/bolt on?

surely easyer than running cables all through the car moving the battery?
Title: Re: How important is battery ventilation?
Post by: F17BAD on 02 September 2011, 13:06

Kells' your engine bay makes me jelous whenever I see it lol, what did you use to mount the water and coolant bottles too did you make something up?

yeah we made some brakets up.. i only moved the washer bottle because i needed the space where the MK3 one is to route my induction kit

if i was you i would just move the coolant bottle, moving the battery crossed my mind for about 1 second im not really down for it

have you a recent pic of your bay for me to see ??
Title: Re: How important is battery ventilation?
Post by: Dan_GTi8v on 02 September 2011, 13:50
this was taken just after I got it running but its pretty much the same as it is now

(http://i147.photobucket.com/albums/r309/Danuk100/18t%20conversion/DSCF6176.jpg)

I know its very messy :P It's had a clean since then but all the pipes and crap are still as it is in the pic

I was wanting to move the battery so I can have the induction cone there, as it is now the rubber piping is a bit bent. Its either move the battery or somehow remove the metal oe tip and make something up to route it so it goes the other way and the cone could be in the big space on the drivers side

looking at this pic makes me sad lol I need to tidy this up but i'm just too lazy
Title: Re: How important is battery ventilation?
Post by: leigh_harty on 03 September 2011, 08:35
Get youself to a scrappy and rip the wiring out of a beemer that has one in the boot. E36 have a longer floor pan than a golf so should have ample cable to play with.. presuming you havent already