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smells like gas

Old December 23rd, 2018, 10:07 AM
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Angry smells like gas

Hi All,

My 70 442 with a 455 smells like gas in the garage after I shut it off, no visible leak that I can see. Any Idea's ?

Happy Holidays all

Craig
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Old December 23rd, 2018, 11:00 AM
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Check and see if you have a gas line leaking onto the exhaust pipe. If dripping when running, and hits the pipe, and evaporates. won't see. but you could still smell it.
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Old December 23rd, 2018, 11:03 AM
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Check your air horn gasket around the accerator pump, they can get a bit wet.
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Old December 23rd, 2018, 11:15 AM
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Originally Posted by Craigs442 View Post
Any Ideas?
Yes, check your fuel lines from one end to the other. The suggestions above are good, but, frankly, gas is very volatile, and it doesn't need to drip onto a hot pipe to evaporate quickly, and even a small leak can smell up a garage pretty quickly. Sniff around, and see if you can determine where the smell is strongest, front of the car, rear of the car, or somewhere in the middle. Lift the hood. Is the smell much stronger or about the same? Look at the gas tank. Seepage leaks won't necessarily leak fast enough to drip on the ground, but a small amount of gas seeping through a crack, pinhole, or thin spot will wet the exterior of the tank at that location and cause the smell. Remember, too, that some gas odor was not uncommon with these cars when they were new. There is gasoline in the carburetor when you shut the engine off. Vapors from evaporation of that gasoline can cause a small whiff of gasoline even if there are no leaks.

The bottom line is, you have to be a detective here. There's no simple, single answer. Hunt around. Rule out possibilities. Etc.
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Old December 23rd, 2018, 11:39 AM
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Is it hard to start after it sits for a day, few days or a week. Gas may be leaking out of the carb. Possible well pugs on the carb leaking.
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Old December 23rd, 2018, 01:26 PM
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In addition to above, check your float level. Check the vent lines for the fuel system.
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Old December 23rd, 2018, 05:42 PM
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Check your fuel pump too. Earlier this year I found that my pump was leaking but it would run down and not hit the floor.
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Old December 23rd, 2018, 07:06 PM
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Just the other day I was reading about this problem. The additives put in modern gas cause it to permeate more readily thru older rubber hose. If your hoses haven't been replaced it might be worth replacing them with fuel injection rated hose to get something with a barrier lining. The article said that older hose would allow approx. 2 gals of gas a year to permeate thru old style rubber hose. So a leak with no drip.
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Old December 24th, 2018, 08:21 AM
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Well if your as slow as I am, then read on ..
Back in early November, my wife went to check the central vac hose coming from the garage and said " I could have blown myself up YA know. Get that car and snowmobiles out of the garage now!. If I went out ther with a cigarette , I may not be in here talking to you rite now.

Well,... gawd I love er' so ... out to the garage I ran. I smelled around the car ,and snowmobiles and of course they smelled like gas, 93 octane to be exact . So.. I goes over to my 8 gas cans I filled up and found that I left the vent cap loose on one of them.
Check your gas cans haha!
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Old December 24th, 2018, 05:43 PM
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Unless the fuel line is hemorrhaging fuel, chances are you won’t find a leak. Instead, look around the fuel line, look on the frame, shock mounts, etc, for the stains left behind from evaporating fuel. Most likely your going to find a rusty line around the clamps that hold the lines in place, or above the rearend crossmember.


Last edited by matt69olds; December 27th, 2018 at 06:01 PM.
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Old December 27th, 2018, 02:18 PM
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Thumbs up

Originally Posted by matt69olds View Post
Enless the fuel line is hemorrhaging fuel, chances are you won’t find a leak. Instead, look around the fuel line, look on the frame, shock mounts, etc, for the stains left behind from evaporating fuel. Most likely your going to find a rusty line around the clamps that hold the lines in place, or above the rearend crossmember.

Thanks for the feedback. I will check the fuel lines
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Old December 27th, 2018, 02:19 PM
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Thanks for the suggestios
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Old December 27th, 2018, 02:20 PM
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thanks for the feedback, I will start looking
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Old December 27th, 2018, 02:20 PM
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Thank you
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