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Fuel tank air vent location
#1
Hi I'm àfter help locating my fuel breather valve ona beling 1.6 HDI Reg MF11CYU as having trouble starting in mornings it starts fine 1st thing then cuts out and take a good few attempts for the fuel to come through then its fine for the day. Then fault repeats next day when leaving it over night.Thanks in advance george.
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#2
Hi George, the tank breather is a part of the filler tube - pretty sure you can see the "hole" with the cap off. It has a cotton filter in it which can get plugged if you tend to fill the tank until it gushes out...which puts diesel inside the little air filter and it expands then sets hard.

To prove it's that which is causing the issue (and it may not be, could be a tiny leak anywhere on the low pressure side of the fuel system) then leave the cap off overnight, try in the morning to see if it now starts fine. If still the same, it's not the breather that's causing the issue.

I deleted your duplicate thread btw.
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#3
(30-04-2023, 10:14 AM)357356 Wrote:  Hi I'm àfter help locating my fuel breather valve ona beling 1.6 HDI Reg MF11CYU as having trouble starting in mornings it starts fine 1st thing then cuts out and take a good few attempts for the fuel to come through then its fine for the day. Then fault repeats next day when leaving it over night.Thanks in advance george.

Thank you for taking time to reply will check tmz.
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#4
(30-04-2023, 11:06 AM)Zion Wrote:  Hi George, the tank breather is a part of the filler tube - pretty sure you can see the "hole" with the cap off. It has a cotton filter in it which can get plugged if you tend to fill the tank until it gushes out...which puts diesel inside the little air  filter and it expands then sets hard.

To prove it's that which is causing the issue (and it may not be, could be a tiny leak anywhere on the low pressure side of the fuel system) then leave the cap off overnight, try in the morning to see if it now starts fine. If still the same, it's not the breather that's causing the issue.

I deleted your duplicate thread btw.
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#5
(30-04-2023, 11:06 AM)Zion Wrote:  Hi George, the tank breather is a part of the filler tube - pretty sure you can see the "hole" with the cap off. It has a cotton filter in it which can get plugged if you tend to fill the tank until it gushes out...which puts diesel inside the little air  filter and it expands then sets hard.

To prove it's that which is causing the issue (and it may not be, could be a tiny leak anywhere on the low pressure side of the fuel system) then leave the cap off overnight, try in the morning to see if it now starts fine. If still the same, it's not the breather that's causing the issue.

I deleted your duplicate thread btw.
I have tried looking everywhere to locate the fuel breather valve but with no joy does anybody have a pic of its location please
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#6
It's at the top of the filler tube as I told you earlier. Pictures and PDF attached, the filler vent is piped to the top of the tank. 

The PDF is a parts list and diagram, the pictures show it in full and close up.


Attached Files Thumbnail(s)
       

.pdf   B9 Fuel Filler.pdf (Size: 75.58 KB / Downloads: 7)
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