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7th May 2021, 07:19 PM
#1
Advanced
Fuel Tank Breathers!!
TD42 fuel tank breathers! my gq had a strange sorta drop/cut in the revs only ever in 3rd above 2200rpm. one hard line was completely filled with wasp mud, and the one way valve was cactus. binned both, problem solved
my question is, do i NEED to run a one way valve in the breather line or is it pretty useless & am i better off extending it up somewhere and putting a little ryco inline filter instead?
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7th May 2021 07:19 PM
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7th May 2021, 10:37 PM
#2
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7th May 2021, 10:52 PM
#3
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Rossco (7th May 2021), rusty_nail (13th May 2021)
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8th May 2021, 09:57 AM
#4
Advanced
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8th May 2021, 11:53 AM
#5
Patrol God
Apologies ahead for thread-hijack nuffy spanner in the works kinda question out here regarding tank breathers...
But when you undo the cap and the hiss suction nearly sucks your hand in, is this a factory kinda thing or is there a breather issue at hand here ?
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8th May 2021, 12:19 PM
#6
Originally Posted by
Hodge
Apologies ahead for thread-hijack nuffy spanner in the works kinda question out here regarding tank breathers...
But when you undo the cap and the hiss suction nearly sucks your hand in, is this a factory kinda thing or is there a breather issue at hand here ?
Sent from my Pixel 3a XL using Tapatalk
Breather issue. The breather is a 10c item with a crude flap, designed to let air into the tank to replace the fuel that has been used. The tank does get a return fuel flow also. The tank also has a larger vent line that feeds from the filler stem to the tank to facilitate the discharge of the air during filling. If the tank hisses, the breather is blocked. I have seen first hand a vehicle that refused to start and run more than 5 seconds when the breather became filled with mud and ice. Upon opening the cap, it started first time and ran sweetly. There was a significant hiss when opening the tank.
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8th May 2021, 12:28 PM
#7
Patrol God
Originally Posted by
PeeBee
Breather issue. The breather is a 10c item with a crude flap, designed to let air into the tank to replace the fuel that has been used. The tank does get a return fuel flow also. The tank also has a larger vent line that feeds from the filler stem to the tank to facilitate the discharge of the air during filling. If the tank hisses, the breather is blocked. I have seen first hand a vehicle that refused to start and run more than 5 seconds when the breather became filled with mud and ice. Upon opening the cap, it started first time and ran sweetly. There was a significant hiss when opening the tank.
Thanks PB. I knew there was the one at the filler point.
I'll go and have a look for the other one and check.
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8th May 2021, 02:07 PM
#8
Patrol God
So I found this.
What I assume is the one way valve at the end of the pipe ?
And then this plasticy doodah cap thing on the end of it.
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8th May 2021, 02:22 PM
#9
Advanced
hey mate! nah that’s the little breather ‘cup’, it’s supposed to create a pocket of air to avoid water entering the tank if it was to be submerged, but it isn’t very affective. the one way valve is a very small black tank just off the side of the fuel tank behind the flap that covers the filler neck! best bet is to extend the breather up high and bin the one way valve
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8th May 2021, 03:22 PM
#10
Patrol God
Originally Posted by
sussgq
hey mate! nah that’s the little breather ‘cup’, it’s supposed to create a pocket of air to avoid water entering the tank if it was to be submerged, but it isn’t very affective. the one way valve is a very small black tank just off the side of the fuel tank behind the flap that covers the filler neck! best bet is to extend the breather up high and bin the one way valve
Yep gotya cheers for that ! I think I traced it out ...
I come across this...
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The Following User Says Thank You to Hodge For This Useful Post:
clawrence (16th May 2021)