70 battery vent tube

[Jeff S.]

I have two battery vent tubes and both are ribbed, should one hose not be ribbed. thanks Jeff

[Alan S.]

Re: 70 battery vent tube

Hi Jeff,
The AIM shows 2 part numbers for the hoses.
I would expect to see one ribbed and one smooth hose.
On my 71 the ribbed hose is longer than the smooth by about 3".
Since 2 different lengths of hose were used I guess the ribs helped the worker grab one long and short hose?.
Regards,
Alan

[Jeff S.]

Re: 70 battery vent tube

Alan

I have looked all over for a thin wall tube even called Restoration battery but cannot find a smooth tube,do you know anyone selling them. Thanks Jeff

[Edward J.]

Re: 70 battery vent tube

Jeff, how about Doc Rebuild he sometimes seel some great repro hoses.

[Alan S.]

Re: 70 battery vent tube

Hi Jeff,
Dr. R does show the hoses BUT implies that both hoses were ribbed... it's certainly worth a call though.
Otherwise, try Gee Auto Sales, in Middlebury Center, Pa.. Gale Gee is a very helpful fellow and may well have some originals.
Good Luck!
Regards,
Alan

[Jeff S.]

Re: 70 battery vent tube

Thanks guys.

I called dr. rebuild oniy has ribbed. And Gale is getting ready for that hurricane. Strike two. I will try other places for originals. Thanks Jeff

[Don L.]

Re: 70 battery vent tube

Unless my memory is failing me (too), I recall that I used to have both tubes looking the same on my '72 - can't recall whether it was ribbed or smooth, without looking at the car (I'm @ work and the car isn't). I got dinged at a chapter judging for having one NTFP tube a few years back and then made the change so that I had one ribbed and one smooth. I thought I got what I needed from Paragon. I just looked at Paragon's catalog and it only says '...ribs". I can look at the car tonight and search my documents to see where I got my tubing from if it helps.

Doesn't the TM & JG say what is expected?

[Alan S.]

Re: 70 battery vent tube

Hi Don,
The Fourth Edition Judging Guide indicates the longer hose has ribs and the shorter hose is plain.
Regards,
Alan

[Jeff S.]

Re: 70 battery vent tube

Don

Thankyou for taking the time to look. If you can come up with a supplier for the tubes it would help alot. Thanks Jeff

[Ron G.]

Re: 70 battery vent tube

Also those hoses face the rear of the car.

[Don L.]

Re: 70 battery vent tube

Jeff, I got home from work and pulled the car down to take a look at what I have. I also pulled my receipts and offer the following thoughts:

When I bought my Restoration Battery in 2008, I bought the caps and vent tubes with it. Both tubes were smooth. I got dinged at the MI Chapter judging in 2009 for not having the one ribbed tube. I went to Paragon, bought the tube kit, which probably has 2 ribbed tubes - you might want to call them and confirm that both tubes in the kit are ribbed. To be TFP, I used one tube from the Paragon kit and retained one smooth tube from Restoration Battery. This gave me a full and "correct" set. At the 2011 National, I lost 1 point (originality) for the reproduction battery (parting lines showing in battery top), but got full points awarded for the caps and tubes. Was I lucky? Dunno.

Ron, are you sure about the direction you cite? My vent tubes are FORWARD of the battery (facing front, not rear). The JG says "The hoses should face the front of the battery." Also, UPC 12, Sheet A10 shows the vent tubes forward of the battery.

[Paul O.]

Re: 70 battery vent tube

The reason the angle cut of the hose and is pointing to the rear of the car and the answer is?


As the car is in forward motion the air going past the hose causes a drop in pressure ( Bernoulli's principle) which in-turn causes a flow of battery gases to exit the battery.

[Bill C.]

Re: 70 battery vent tube

I thought the air flow had to cut across the angle cut to cause a pressure drop?
Kind of like a air foil section of a wing. Faster air over the curved section, slower air on the bottom (flat), lower pressure up top.

This would mean the angled cut section would be to either side, not in the rear.


May be wrong but just not sure ....

my 2 cents...

[Ron G.]

Re: 70 battery vent tube

Bill,

I meant that the open part of the angle faces the rear portion of the vehicle.

[Don L.]

Re: 70 battery vent tube

Paul, until he rings back in, are you saying you think Ron G. was referring to the angle of the cut off ends when he said "Also those hoses face the rear of the car." and not the vent tube install orientation itself? That does make good sense.

Whether or not they were intended to face rearward, the AIM fails to show any detail regarding orientation of the cut that I could see. Right or wrong, mine face reward. I've attached a photo that I took tonight, standing under the center of the car, looking outboard. You can see that the ribbed vent tube is in the aft position. Smooth in forward position.

Frankly, I struggle to see how the line operator(s) would spend the time it takes to ensure specific orientation of the beveled cut, regardless of work instruction or spec, no? Does anyone know the elevation of the body during this part of the assy. process?

BTW, Jeff - if it helps, I also measured my vent tubes tonight. ID = 1/4". OD = 3/8" (both tubes).

Hope this helps...