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8

Despite any opinions of safety it seems that gas tanks are manufactured to not accept more than 95% of their total volume because of regulations. Here is a quote from the US Department of Transportation Federal Motor Carry Safety Administration Regulation 393.67 Subpart E. (12) Overfill restriction. A liquid fuel tank manufactured on or after January 1, ...


4

To add a little bit to Paulster2's answer the upper and lower Explosive Limits of Gasoline is 7.6% and 1.4% respectively. This means that a concentration outside of those limits will either be to rich or lean to burn. And since Gasoline's Flash point is -45 °F (-43 °C) it's pretty much always putting off vapors, which would push any air out of the tank. It's ...


3

There is a kit that contains a new sending unit, float and seal. It retails for 239.20 according to gmpartsdirect.com, they will sell it to you for $124.38. There should be an access panel in the trunk under the mat, so dropping the tank should not be necessary. Expect a shop to bill retail for the part plus an hour of labor. You can probably do this ...


3

You could absorb it with a rag. Either put continue to hold the tank upside down and stick a rag in the collar around the opening or hold onto a corner and lower the rag into the tank. Leave the cap off and whatever residue that is left after you pull out the rag should evaporate quickly.


2

If you perform the repairs yourself the fuel level sensor seems to cost about $100. When the sending unit goes bad the fuel gauge will usually not move at all. It does sound like it could be an issue with the fuel level sensor in your car. Perhaps the float just needs to be adjusted. Maybe someone bent it out of shape when performing a repair. For ...


2

I pulled this from the talk side of Wikipedia page on electric fuel pumps, which I think explains it pretty well: I am an auto mechanic who also has a chemistry background. The reason electric, tank- mounted fuel pumps do not cause explosions is that the concentration of fuel vapors is too high to allow an explosive mixture. The volatile (which in this ...


2

Depending on the class/model, there should be somewhere between 1.5-2.1 USG (~6-8 litres) left in the tank when the light comes on. Here is some interesting reading on this very subject. It seems MB has had a lot of problems with their fuel level indicators. Seems the "best defense" against this is to never let it get below a 1/4 tank on the gauge. Either ...


1

I don't know exactly how the pump comes out of the holder, but if you are saying the black tube is the only thing which is really holding it in, just cut it. You'll get a new hose with your new pump. The pump I just looked at had it in the parts kit. Comes with two hose clamps which connect both ends for you. You'll also get a new strainer for the bottom, so ...


1

You could also heat the tank lightly, without open flame (hair dryer maybe). This would cause the gas left inside to evaporate, then could be forced out using a compressor hose. You'd need to be careful not to heat it to high so as to cause combustion. Also, do this in a well ventilated area so as to not inhale the fumes.


1

K.B.S coatings make a 3 step kit to clean blast and reseal tank.Involves tank removal (a compressor aids in one part of process-I used a hair dryer) and is suitable for cars and bikes.



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