| Brick in My Gas Tank [message #76208] |
Wed, 10 March 2010 01:34  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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Today we were surprised. We were handling the main tank for the third time in three days. (We finally found a tiny cut in the hose... less than one year old...) Of course we drained the tank. Of course we had it drip gas out of the fill tube. Of course we said, "Of course."
None of that was surprising. We decided to pour the last of the gas into a bucket... being tired of it dripping on us. We heard a sliding clunk.
"Someone left a wrench in my tank!" I was hoping for a nice crescent or perhaps a pair of vice grips.
No such luck. It was a baffle that had broken loose. It was on the filler side, about 1/3 of the way... running front to back of the tank, I suppose eliminating sideways slosh.
I now understood why we had to have a small hole patched the year before... a spot weld pulled a weak spot.
Since when were there baffles in our tanks?
And, yeah... it is still there. It has been there for a while and I guess it will be for a while longer. As Louie Depello used to say, "Drive it."
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: Brick in My Gas Tank [message #76233 is a reply to message #76208] |
Wed, 10 March 2010 09:24  |
Larry C
Messages: 1168
Registered: July 2004
Location: NE Illinois by the Illino...
Karma: 0
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Senior Member |
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Since when were there baffles in our tanks?
__________________________________________________
Hey I can respond two ways, what I know and what I read.
What i know
When my tanks were dropped for inspection I saw inside. From what little I was able to see, I only saw a tank, no baffles.
We all know there is the partition for the reserve gallons but it surely is attached more securely than that.
Without using a mirror to look inside again, I had not seen a baffle, but it does not surprise me.
What I read
25 gallons of fuel weighs in at about 150 lbs. There is no problem with a full tank as the fuel cannot slosh.
When you are down to 20 gallons at about 14o lbs, the slosh can be quite forcefull and we have two of those tanks.
I read the industry added baffles to slow down the slosh factor which would keep the control in the hands of the operator.
There is no reason to beleive they would not have thought of this addition to the tank at this late stage of vehicle production.
LarC ( have a good day )
Gatsbys' CRUISER  08-18-04
74 GLACIER X, 260/455-APC-4 Bagg'r
Remflex Manifold gaskets
CampGrounds needed, Add yours to "PLACES" />
http://www.gmceast.com/travel
_
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| Re: Brick in My Gas Tank [message #76266 is a reply to message #76233] |
Wed, 10 March 2010 14:09 |
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| Larry C wrote on Wed, 10 March 2010 09:24 |
Since when were there baffles in our tanks?
__________________________________________________
Hey I can respond two ways, what I know and what I read.
What i know
When my tanks were dropped for inspection I saw inside. From what little I was able to see, I only saw a tank, no baffles.
We all know there is the partition for the reserve gallons but it surely is attached more securely than that.
Without using a mirror to look inside again, I had not seen a baffle, but it does not surprise me.
What I read
25 gallons of fuel weighs in at about 150 lbs. There is no problem with a full tank as the fuel cannot slosh.
When you are down to 20 gallons at about 14o lbs, the slosh can be quite forcefull and we have two of those tanks.
I read the industry added baffles to slow down the slosh factor which would keep the control in the hands of the operator.
There is no reason to beleive they would not have thought of this addition to the tank at this late stage of vehicle production.
LarC ( have a good day )
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since I have many 5 gallon (18.9l) gas tanks I can tell you that 5 gallons of fuel weigs considerably more then 10 pounds, or even 10 kilos for that matter... take into account that automotive fuel has a nominal weight of 6.2 lbs per gallon and times that by 5 to find out how much 5 gallons is ... 31# 
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
[Updated on: Wed, 10 March 2010 14:15] Report message to a moderator |
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| Re: [GMCnet] Brick in My Gas Tank [message #76269 is a reply to message #76266] |
Wed, 10 March 2010 14:22 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Larry C had it correctly. Approx weight of gasoline is
6# / gallon. 25 gallons weigh pretty close to 150#.
Mac Macdonald
Oklahoma City
> To: gmclist@temp.gmcnet.org
> From: defconfx@gmail.com
> Date: Wed, 10 Mar 2010 14:09:46 -0600
> Subject: Re: [GMCnet] Brick in My Gas Tank
>
>
>
> Larry C wrote on Wed, 10 March 2010 09:24
>> Since when were there baffles in our tanks?
>> __________________________________________________
>>
>> Hey I can respond two ways, what I know and what I read.
>>
>> What i know
>> When my tanks were dropped for inspection I saw inside. From what little I was able to see, I only saw a tank, no baffles.
>>
>> We all know there is the partition for the reserve gallons but it surely is attached more securely than that.
>>
>> Without using a mirror to look inside again, I had not seen a baffle, but it does not surprise me.
>>
>>
>> What I read
>> 25 gallons of fuel weighs in at about 150 lbs. There is no problem with a full tank as the fuel cannot slosh.
>>
>> When you are down to 20 gallons at about 14o lbs, the slosh can be quite forcefull and we have two of those tanks.
>>
>> I read the industry added baffles to slow down the slosh factor which would keep the control in the hands of the operator.
>>
>> There is no reason to beleive they would not have thought of this addition to the tank at this late stage of vehicle production.
>>
>>
>> LarC ( have a good day )
>
>
> since I have many 5 gallon (18.9l) gas tanks I can tell you that 5 gallons of fuel weigs considerably more then 10 pounds, or even 10 kilos for that matter...
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| Re: Brick in My Gas Tank [message #76314 is a reply to message #76208] |
Wed, 10 March 2010 22:27 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| George Beckman wrote on Wed, 10 March 2010 01:34 |
Today we were surprised. We decided to pour the last of the gas into a bucket... being tired of it dripping on us. We heard a sliding clunk.
It was a baffle that had broken loose. It was on the filler side, about 1/3 of the way... running front to back of the tank, I suppose eliminating sideways slosh.
I now understood why we had to have a small hole patched the year before... a spot weld pulled a weak spot.
Since when were there baffles in our tanks?
And, yeah... it is still there. It has been there for a while and I guess it will be for a while longer. As Louie Depello used to say, "Drive it."
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I can tell you for sure that early '74 tanks have baffles, two per tank. Both tanks and yes they fore and aft to reduce side to side slosh. They are welded to the top half of the tank with spot welds. If it breaks loose I would be very interested in how someone could remove it.
The reserve feature is a function of the fill tube entry height, there is no baffle that provides that function.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Brick in My Gas Tank [message #76317 is a reply to message #76314] |
Wed, 10 March 2010 23:31 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| midlf wrote on Wed, 10 March 2010 20:27 |
I can tell you for sure that early '74 tanks have baffles, two per tank. Both tanks and yes they fore and aft to reduce side to side slosh. They are welded to the top half of the tank with spot welds. If it breaks loose I would be very interested in how someone could remove it.
The reserve feature is a function of the fill tube entry height, there is no baffle that provides that function.
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It will not come out the sender hole. It would have to be cut in pieces to remove. Or a better man than I to bend it to get it out. My only fear is that it will slide by and whack my sender pickup and tear the sock or ruin the float.
If there were two, one has been taken out or there are two in there. The one that broke loose was the one on the fill tube side.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: Brick in My Gas Tank [message #76318 is a reply to message #76317] |
Wed, 10 March 2010 23:45 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| George Beckman wrote on Wed, 10 March 2010 23:31 |
| midlf wrote on Wed, 10 March 2010 20:27 |
I can tell you for sure that early '74 tanks have baffles, two per tank. Both tanks and yes they fore and aft to reduce side to side slosh. They are welded to the top half of the tank with spot welds. If it breaks loose I would be very interested in how someone could remove it.
The reserve feature is a function of the fill tube entry height, there is no baffle that provides that function.
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It will not come out the sender hole. It would have to be cut in pieces to remove. Or a better man than I to bend it to get it out. My only fear is that it will slide by and whack my sender pickup and tear the sock or ruin the float.
If there were two, one has been taken out or there are two in there. The one that broke loose was the one on the fill tube side.
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You should be able to see both. I have one that is partially loose and wobbles around. I was thinking of trying to epoxy it in place, somehow. You might give that a try to tie down you loose one, it should be easy. Just get it somewhere near the sender opening, where it will not interfere with the pickup and float, and epoxy it down in several places. Just make sure the stuff you use is fuel proof.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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