fuel breather vents

[rdssdi]

I installed the Newton equipment (UK) breather vent valves. For the short time they have been attached it appears that there is far less fuel odor in the garage. Although there is still some in trunk (boot) most likely from the filler cap vent. Possibly sender unit?



Bob

[ppnelan]

Bob, did you ditch the up-&-over pipes and put the vents onto the tank pipe stubs?
Do you have details & price of the parts used?

Thanks.
Matthew

[Elanintheforest]

Bob...I think I've cured my problem...or at least diagnosed the possible cause of the smell of petrol in the car

When Elans rust, they really go!

Mark

[garyeanderson]

Bob...I think I've cured my problem...or at least diagnosed the possible cause of the smell of petrol in the car

When Elans rust, they really go!

Mark

Looks like the bilge pump had a faulty autobailer switch, was it Lucas brand?

[types26/36]

Bob...I think I've cured my problem

Now that is carrying "add lightness" to the extreme

[rdssdi]

I have attached a photo of the tank. I have Mocal check valves (AN -6) fit into the top of the cuystom alloy tank (made by Axminster Specialist Panels UK) and the breather vent valves are the cylindrical units attached after the 90 deg. elbow.

Unfortunately this has not entirely resolved the fuel odor problem. While the fuel odor in the garage is reduced (virtually gone), the trunk (boot) will smell of fuel if left closed for an extended period.

I will refit with the addition of Hylomar the rubber hose to metal conNections and the fuel sender.

Before doing that I will temporarily seal the filler cap vent to determine if that is the sole source of fuel odor.

Bob

[gerrym]

Bob, I experimented last year with various high quality petrol nitrile hose Goodyear brand etc) connected into/out of a swirl pot half filled with unleaded. The screwed connections were sealed with the proper loctite product. The test contraption was left in my wife's car boot for several days.
Results was a definite taint of fuel. The nitrile hoses have fairly high levels of permeation. the solution I've now adopted is to have all my internal hoses ptfe/stainless steel. The test contraption using this type of hose was completely odour free. This type of hose cannot be joined by a push-on connection so everything is connected via JIC fittings (except filler neck and that will be everntually too)
Regards
Gerry

[rdssdi]

Gerry
As I was concerned with fuel odor I decided to use fuel line as a breather hose rather than the clear plastic (neoprene?) used originally.

Is "ptfe/stainless" hose you mention AN (aeroquip or equivalent)? As you can see in the photo I am using AN fittings already for the breathers.

It is a bit confusing as rubber fuel hose is used in new cars here in the U.S. where fuel vapor emissions are tightly regulated. In order to pass muster a new vehicle must be able to have vapor emissions in several PPM or less. Certainly far below a level where an odor can be detected.

It may be that new car fuel line is PTFE? I will look into it.

Bob