Gas leak...

Since no one has answered, I'll give this advice....

You do know that gasoline expands, especially after you fill up you tank and especially when it gets warm.

Maybe you overfilled and the gas pressure pushed it out of the gasket on top of the tank.

Just a thought....

James in Denver

 

You have a problem. Gas will not expand and leak out of the gasket at the sending unit area. I fill to the top of the fuel hose and it has never leaked. Any "pressure"will come out of the overflow hose in the neck of the fuel pipe. I believe you have a leak in the gasket and need to get it fixed. Should not be to much of a problem. Get it done ASAP before it lights up.

 

NEVER drive GT4 when you smell gas like that. Stop and find out what is causing it. You're lucky you didn't burn your new toy right down to the ground Jim.

 

Dennis McCann $4

 

Jim that hose on the top of the tank leading to the vent tubes in the pic looks really bad. you can see the cracks in it above and below the clamp. Looks like a bulge in it as well.

Better replace everything you can.

 

Yes -- Change ALL of the gas lines on the car. Based on the condition of what can be seen in the pictures you posted, they look like they need it, badly. Old hoses = potential fuel leaks = major fire hazard. It's a bit of a PITA to change some of them without pulling the engine, but do it. And consider draining the tanks and changing the cross-over hoses at the bottom. They are often forgotten but deteriorate just like the rest. When I pulled them off my '78 308 recently, they were definitely showing signs of their age, with substantial cracking. No time like the present to take care of this.

Alternative -- carry a BIG fire extinguisher in the car, and know how to use it.

My $.02.

 

MY thoughts as well, based on the condition of that one hose in the picture, I would replace all the hoses in the fuel system. Did it recently in my 328, did not worry about part numbers, just removed all the hoses, measured them and bought local replacements (top quality hoses and clamps). After all a hose is a hose.

 

All kinds of threads on this but i still never know where all the lines are or what the different sizes are or where to get 'em. people talk of the gates hoses but where to get 'em and then what size again etc.

 

The rubber hose for the Fuel Filler neck is a MAJOR cause of fires and should be replaced ASAP.
Many threads on it, if you do a "search". (at least it's critical on 308gtb,gts) not sure about gt4's.

 

My fuel filler neck hose has been replaced but i wanna replace it again cuz i can see cracks from the underside with a flashlight. It's only like 3 1/2 inches long. Can someone again tell me the width. don't wanna use a standard size but want to use the actual metric size.

 

****IMPORTANT****

Make sure all hoses that carry gas/gas fumes are rated for gasoline.

 

Exactly correct. Most of the hose in the fuel system on my '78 seemed to be 5/16". Some was 1/4", mainly the vacuum lines. The cross-overs were 1 3/8" IIRC. I don't remember the filler neck size, but will check and post. Be sure to buy top quality hose and clamps.

I got the Gates hose at NAPA in my area. All the stock fuel hose I got from them was Gates stuff. And as someone else mentioned, it is extremely important that you be sure you only use fuel line in the fuel system and related vacuum lines. And don't forget to go up over the right side tank and change all the little hoses up there to the charcoal cannister, etc. Those are easily overlooked.

 

Euro dealers are a good source of the metric hose.....BMW or VW close by??

 

Who was it that pointed out that hose? *winks*

Gonna check prices at Brumos Porsche and the BMW place tomorrow.

Anyone got a pic of the hoses underneath the car..i've jacked mine up and can't find the one that connects the two gas tanks at the bottom.

 

A lucky escape!

That piece of c**p that split is a prime example of why I only use original style hose. It even looks like heater hose? That particular hose is supposed to be clear, at least when new.

I would heed the advice of others, replace every single piece of fuel related hose in the car. And especially the filler hose and the 2 hoses on bottom transfer pipe. Do not cheap out on these, make very sure they are fuel rated. (The 2 transfer pipe hoses cost me > $50 each from Ferrari, no regrets). My car smelled of gas on the first 2 rides I took in it, since replacing all the hoses no smell at all. If yours is a US car there are lots of hoses, mostly related to the vapour system. Euro cars like mine have only a few fuel related hoses.

BTW the pipe that the broken hose is connected to is supposed to be plain aluminum, not covered with undercoating?

Gerrit
http://dino308gt4.com