Blanking grommets in battery box?

[greenbeam]

Hi all,
The battery box in my Series 3 has five (!) 1" holes, of which I need one for the positive 12v cable.

There are two in the base of the box, two on the front face near the top, and one on the side facing the prop shaft where the main power feed cable passes through. That last one has a standard grommet to prevent the cable from chafing.

Can (or should) I put blanking grommets in the unused ones? There is space around the power cable for venting any fumes and a 1/4" hole in the base to drain any moisture. What was in all the extra 1" holes originally? Are they original? inquiring minds etc...

Cheers,
Paul.

 

[mikephillips]

Never seen anything that said, but it wouldn't surprise me if they were for the Hillman since that's where the basic floor pan came from. I've put grommets in, most of us have them garaged when not in use and aren't every type of weather users anymore and I haven't had a problem as long as there is some bit of venting of the box, just in case.

 

[greenbeam]

Thanks Mike, it was 50% curious as to why they'd put so many large holes for road spray to enter, 50% is this original, and 10% is it ok to block them off. (it seems expected that everyone gives 110% nowadays, right? )

Cheers,
Paul.

 

[bobcat@4250]

Hi all,
The battery box in my Series 3 has five (!) 1" holes, of which I need one for the positive 12v cable.

There are two in the base of the box, two on the front face near the top, and one on the side facing the prop shaft where the main power feed cable passes through. That last one has a standard grommet to prevent the cable from chafing.

Can (or should) I put blanking grommets in the unused ones? There is space around the power cable for venting any fumes and a 1/4" hole in the base to drain any moisture. What was in all the extra 1" holes originally? Are they original? inquiring minds etc...

Cheers,
Paul.

Those extra holes are for venting the hydrogen gas from the battery. Don’t plug them !!!

 

[mikephillips]

Maybe leave one of the upper ones open for that. Since hydrogen is lighter and rises the lower holes won't matter for that. Those may have been Hillman related or to allow drainage. I've personally never had an issue with them being covered or plugged over the years.