Fuel Pump Breather Hose

[vintaylor]

Hi Guys,

 

I've got one remaining rubber tube attached in the engine bay.. Does anyone know what it is and where it should connect to ?  

 

Maybe a breather hose?

 

[mdw]

Fuel pump breather? Its in the front left corner on my 88n/a and looks similar.

[vintaylor]

Hi Malcolm..

That does make sense .. after the fuel pump what should it to connect to at the other end ?

[mdw]

I think on mine it didn't connect to anything.  I have a feeling it simply exits higher than the tank top. May have been clipped to the ply tank top board  but I don't know as I used a vacuum cleaner to remove all that was left of both my tank top boards they were so rotten.  I am guessing here so others may be able to say for sure.

[robertcosta]

Fuel tank breather. Yes, not connected. It is just clipped to the underside of the lip of the engine surround.

[vintaylor]

HI rlc,

 

Thanks for identifying this ... My issue is my entire breather system crumbled to bits upon removal so I really have no clue how the system should be connected up.  Does this mean that this pipe is the outlet of both fuel tank breather pipes ?

 

Would you by any chance have any pictures of how this should be connected up?

[robertcosta]

Same as this..

 

http://www.lotusespritworld.com/EGuides/EMaintenance/FuelBreatheHose.html

 

Although for the turbo...its the same.

 

Rob

[vintaylor]

Had a look at the parts manual.. it looks like the breather hose goes out to the left right side of the engine bay on the turbo mondel.. Mine is on the left.. Could this be correct?

The link doesn't however mention any pipe going into the engine bay :S

[mdw]

Its the fuel PUMP breather NOT the tank breather.  It should fit onto a small stub on the side of the SU pump see top of the pump in the pic ( small silver stub with a barbed end).  Its nothing to do with the tank breather hose that crumbles and goes around the hatch rim.

I assume its there to let the diaphram move in the pump body and has to go up above the tank top incase the diaphram splits so it doesnt drain all the fuel out.

 

 

You can see it in the 2nd pic with a replacement black hose  on the top of the pump on my car.  Sorry rubbish pic but under tray is on  and poor access.

[vintaylor]

Awesome stuff Malcolm,

That makes alot of sense.  So does one end attach to the pump and the other just pointed down toward the ground in the engine bay?

 

I'll have to check if I have a breather hose on my fuel pump as it is not an SU pump:

 

[mdw]

On mine the hose was clipped vertically from the pump up the side of the engine bay and I cant remember if it went throught the wall and just exited above the tank top  with just a cut end or just hung down in the bay with just a cut end .  I am reasonably sure it doesn't connect to anything as it seems to be  just an air vent for the area behind the diaphram.

 

 

Nice fuel lines,  very slick with the crimped ends.  Mine just got sleeved and pipe clipped.

[vintaylor]

Hi Malcolm,

 

That makes sense as the hose does exit through the engine bay wall and into the fuel tank area... I thought this was the entrance into the engine bay rather than the exit into the fuel tank area! lol

 

I think the issue is sorted now .. I hope this is of value to anyone else ..

 

 

Can any moderator change the title to : Fuel Pump Breather Hose ?  As it would be easier to find for other members

[Advantage]

 

Can any moderator change the title to : Fuel Pump Breather Hose ?  As it would be easier to find for other members

[Andyww]

Same as this..

 

http://www.lotusespritworld.com/EGuides/EMaintenance/FuelBreatheHose.html

 

Although for the turbo...its the same.

 

Rob

 

Realise this is not the real subject of this thread, but that write-up in the link seems wrong. There isnt a 90 degree elbow, there is in fact a T-piece and seems that on the authors car one of the sides of the T had broken off. There are two pipes which run over the top from one side to the other. One is a breather and the other is a pressure balance pipe. Exactly as shown in post #8