Diesel Fuel Tank Vent (1 Viewer)

[1990 LJ78]

OK..
I have a question I want to ask..
I hope there are some people out there that
have an answer..

Do you experience a vaccum when
you open your fuel tank to refill.??

Is this normal.?? If normal ok..
If abnormal what is the common cause for this???

I ask this question as every time I go to fill the tank and remove the cap there is a wosh of air sucked into the tank..

Should the vent stop this from happening??
Or what??


Thanks in advance.

 

[roscoFJ73]

My 2 landcruisers and my old Dyna truck all pressurised the tank.
I dont know if anyone fully fathoms the tangled octopus of fuel lines around the tank.
Landcruisers began getting a small inline vent thing about 85-86.Its white and about half the size of golf ball on one of the lines about 6 inches from the filler tube.(from memory)
Maybe take it out and blow though it.Note the one way arrows on the vent.

 

[prado t]

mine does the same thing , not too good .

 

[matt 105]

Its the cap.

 

[M John Galt]

My 13B-T pressurizes the tank