[DeTomaso] Vent to tank gas leak

[wkooiman at earthlink.net]

I plan on running a vent - just not to the original location.

BTW, I didn't run a vent - at all - for several years.  It was plugged.  Most likely there was enough leakage around the Hall Permacap.  All I know is I didn't have any of the normal problems associated with a non-vented system.


-----Original Message-----
>From: mikeldrew at aol.com
>Sent: May 19, 2010 7:38 PM
>To: wkooiman at earthlink.net, JDeRyke at aol.com, b.hower3400 at yahoo.com
>Cc: detomaso at realbig.com
>Subject: Re: [DeTomaso] Vent to tank gas leak
>
>
>Will wrote:
>
>The engine is out. The gas tank is out. The rollover valve went 
>bye-bye.  The
>welder said hello, and now the 1" hole is gone.
>
>The next time I do an expansion valve, I'll hook it to the highest 
>point - like
>the filler tube.
>
>>>>DO NOT put the tank back in the car without a proper vent of some 
>sort installed somewhere.  There really was no need to weld up the 
>hole--it's not difficult to install a vent in the stock location and 
>get it to seal.  That said, it makes more sense to put it right on the 
>top of the tank, next to the fuel filler.
>
>If you don't vent the tank, you run the very real risk of the tank 
>rupturing due to heat expansion, assuming your gas cap seals properly.  
>The engine heat is easily enough to heat up the air and fuel inside the 
>tank, and it desperately needs to go somewhere.
>
>I had a non-sealing gas cap on my non-vented Cobra replica, and the 
>first weekend I bought it, I parked it in the sun for a few hours.  
>When I came back to it, the sun had heated the air inside the tank, 
>which expanded and forced the fuel up and out the filler neck, which 
>then went into the gas tank, soaking all my clothes and destroyng a 
>camera.
>
>In a Pantera, the same thing would result in gas flowing out the fuel 
>filler and pouring onto the exhaust!
>
>Vent it, either with the stock setup, or a rollover valve, or 
>*something*.
>
>Mike
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