how do I get rid off the fumes(gas smell)

[changuele]

I have a 1971 240Z and it always smell like gas fumes. Any word on how I can solve this problem.

ThanksROFL

[EScanlon]

There have been, literally, volumes written on exactly this issue. From discussing weatherstripping, to cracks in the sheet metal joins, to .......

Do a search through the archives and you'll find more information than you think is possible. Keywords to use: Fumes, Gas Smell, Exhaust Fumes. All of these should give you plenty of information to begin addressing the issue.

E

[v12horse]

I smell gas in the car only when I fill up, so later this week I am going to have my mechanic drop the tank and replace the hoses that go to the gas tank at the right rear quarter. I remember reading a previous thread that stated that one of those hoses could be cracked if the odor is only present right after fill ups. Like Enrique said, there are tons of threads regarding this issue. Good luck and keep us posted on your findings and progress. I will keep you posted on how the work on my car turns out.

-Ben

[MikeW]

I smell gas in the car only when I fill up, so later this week I am going to have my mechanic drop the tank and replace the hoses that go to the gas tank at the right rear quarter.

Keep in mind that there's a huge difference between "gas" fumes and "exhaust" fumes. I sometimes smell gas after filling up and making a hard turn. The gasoline is obviously sloshing around inside the tank and getting into a hose that needs replacing.

Exhaust fumes are more difficult to track down and fix since there are so many ways for them to get in. This is the more common complaint.

It's not clear to me from the original post which of these is the problem.

[ddezso]

Try this:

http://www.classiczcars.com/forums/showthread.php?t=15466&highlight=fumes

[SJGREEN71]

I have a 1971 240Z and it always smell like gas fumes. Any word on how I can solve this problem.

ThanksROFL

I would agree with Ben. There are several vent hoses that can wear out over the years. They are located between the tank and the filler in the right rear quarter panel area. Once those were replaced, the gas smell in my '71 was eliminated.

[TomoHawk]

Before you start replacing the fuel tank hoses, you should consider ordering the new ones, because some of them have special bends (very tight bends) which you can't make with regular hoses.

At the age of your car, you should also consider replacing anything rubber. Just about anything made of rubber or containing rubber on my 78 was dry & hard, or just crumbled when you touched it. Especially the (40psi high presser) fuel lines!

[ezzzzzzz]

In all the efforts to reduce or eliminate exhaust fumes drawn into the car has anyone tried to minimize the low pressure area in the rear? I was thinking that narrow plastic scoops mounted in the rear wheelwell opening (out of view) could be vented up and out the rear valance, just below the bumper, via hose. The outlets could be installed to look factory and visually pleasing. The idea is the low pressure would draw air out of the wheelwell (and from under the car). This might have a positive effect on downforce and lower that notorious low pressure area too. It might help to reduce fumes getting pulled into the car with open windows. I wish I had access to a windtunnel to test the theory. This would supplement the replacement of all rubber and filling of all holes, of course. It's just a thought... What are your opinons?

[=Enigma=]

Here's an onteresting article on the aerodynamic characteristic of the early Z. Unfortunately it doesn't mention the benefits of the rear spoiler regarding the negative pressure which pulls exhaust fumes inside the cab. in any event, the first step to reducing the exhaust fume problem is checking/replacing the hatch and tail light seals, as well as any holes caused by rust rotted body panels.

As for gas fumes, I believe that has been covered for the most part already. In a nutshell is comes down to checking/replacing all the hoses related to the gas tank, including the filler neck tube which is often the problem.

As stated earlier, this has been covered ad nauseum in the forums here so do a search and see what you can find.

http://zccw.org/Tech/Body/early_aero.asp