gas fumess

[fisheasy]

I was wondering if someone could point.me in the right direction. When i drive my flat head particulary in 1st and 2nd i smell gas fumes. Anyone know what may be causing that? I can ride in the car for 5 mins and smell gas all over my clothes when i get out also

 

[Slick Willy]

check for leaks that may be small and that the fan is blowing it back into the car, making it an aerosol. The slower the speed the more concentrated it will be.

 

[fisheasy]

Well its new tank and lines, also new fuel pump and stand. What do you mean about the fan? The radiator fan?

 

[Slick Willy]

yes

 

[fisheasy]

Ok i will check. I was wondering if exhaust maybe leaking

 

[John Kennedy]

Or blow-by gasses. Is this a new problem, or always since you got the car?

 

[Henry/Kokomo]

Check for obvious and sizable air leaks into the car. I had some holes in the firewall that were admitting lots more air than I would have guessed. It doesn't cure the problem but may lessen the symptoms.

 

[fisheasy]

Well i cranked the car up and put my hand in the engine bay. Sure enough strong gail force winds blowing back towards the firewall. I assume that can be fixed?

 

[fisheasy]

Or blow-by gasses. Is this a new problem, or always since you got the car?

Its been like that since i had it. Only had the car a month and a half

 

[Ken Crans]

Put a trouble light on the engine compartment in the dark and see if you see light coming in the interior. i had a problem like that but it was an exhaust leak. Good Luck

 

[Karl Wescott]

Find the fuel leak first, before it finds a source of ignition and you have a nice fire (make sure your fire extinguisher is readily available and servicable). "Slick Willey" suggested a small leak becoming an areosol, this seems likely and as pressurized would be from the fuel pump to the carb.

 

[B_man_Al]

If your problem is blowby gasses, I've found adding a PCV valve makes a world of difference. My experience is with a 4 cylinder model B, so its not directly applicable, but I drilled a hole in the side of my oil filler pipe added a grommet and installed a PCV valve. (In a 4 cylinder, the vent is also the filler). A better solution might be sealing off the oil filler cap and adding another inlet vent on the valve cover, but I found that what I did was sufficient to get rid of the smell inside the car .... a happy wife makes for pleasant touring.

I drilled a new vacuum port in the intake, on the vertical section above the carb. Originally I used a Tee off the wiper port, but was advised that I might burn a valve on #4 because of a leaner mixture there.

Al