After a few instances where my windows lost their memory recently, I've decided to replace my battery with a new one. I pulled the old one today so I can do a hard reset when I pick up the new one tomorrow and install it. The old one is not vented and I see no obvious place in the trunk to vent the new one outside. What am I not seeing?

 

Black plastic tube normally fitted to a right angled adaptor on the left side of the battery.



The tube goes through a grommeted hole in the luggage compartment floor to vent externally.

Graham

 

Can you see that hole in my pictures?

 

Here you go

 

Chris,

That's it! Perfect picture. I found it.

Thanks

 

One caution for which I can thank my specialist's technician. Many of the long case batteries have two vent ports on each end (You only have to use one.) In many cases they are both open when the battery is purchased and there is a little plastic bag attached to the case with the tube adapters and blanking plug for the unused port. If you have the unused port open, the gas will not vent through the overboard discharge defeating its purpose.

 

Just as a follow up. When I picked up the Advance Auto brand battery, there were no plugs or "kit" to vent it. They did give me one vent plug off another battery to use on one side, but I'll have to create my own fitting for the vent hose since it was missing on my old battery.

 

You might try an aquarium supply shop. Air pump hose and fittings are very similar.

 

Correct me if I am off base here, but I remember from another thread that if you install an AGM battery it is not necessary to connect a vent. In fact I am not sure if they even are vented.

 

You're right. Out of an abundance of caution, a maker might put a vent on an AGM (maybe the lawyers or marketing guys demanded it; the engineers didn't) but it's really not necessary. AGMs are widely used unvented in confined spaces.

 

if i might add, the AGM vent where present is not an open atmospheric vent such as with lead-acid cells. it is a high pressure blow-off valve. adding this however ruins the neat aspect of AGM cells where they can be mounted in any position. when this vent is present, it must be on the high side. and no, it does not need an overboard discharge.

 

I had a failing battery putting out 12.V, as a result I was having numerous electrical issues and car went in failsafe mode (that is the worst position you can find yourself in short of dead on the side of the road). Just installed AutoCraft Platinum AGM Battery, Group Size H8, 850 CCA from Advanced Auto (actually 900 CCA) with a 20% online discount. Car runs perfectly and I removed the codes via my OBD II scanner. I have only had the car for a few weeks but I am learning that there is a wealth of info on this forum and youtube. In addition it is not difficult to do it yourself - tool accessibility is key but that is what Harbor Freight is for. The third key takeaway is find where Jag goes for their OEM - you will save quite a bit. Also the car was built in 2002, engineered/designed in the late 90s, we can improve on this, an AGM battery is just one example.

 

The holes in the VARTA type battery vent system can be plugged with a .22 Rim Fire empty shell casing.

Just shoot a .22 and pick up the empty. Plug it into the battery vent hole.
Fits perfect but might deteriorate in the acid fumes?? Works 'in a pinch'.

bob

 

actually it was designed and engineered in the 1980's. quite an accomplishment given what was achieved and how well most of it works along with being competitive with cars developed later, and even recently, under the much more streamlined and shorter schedules. additionally the designers and engineers have access to more resources than they did when creating our car.

true to its heritage in many regards a hand designed and extensively hand built car with fit, finish and mechanical tolerances such as ours will never be seen again.