fuel tank bubbling noise

Joined
Aug 16, 2005
Messages
130
Location
Glendale, CA
 
hey guys - did a search for this, but came up empty.

when sitting, a faint and constant bubbling noise is heard from the rear of the truck. it's so faint, i usually only notice it when i'm away from the city.

i've visually checked for leaks in the fuel filler hose and vapor return lines, and no fuel leaks have been found.

is air getting into my system somewhere, or is this normal due to vapors and expansion of the fuel?

any direction to a previous thread or info would be cool - TSH
 
Joined
Aug 17, 2005
Messages
10
When the tank cools off it sucks air in through one of the lines and it bubbles up through the gas in the tank. It's meant to do that to relieve the vacuum as the gas cools off.
 

cbmontgo

SILVER Star
Joined
Feb 28, 2004
Messages
4,482
Location
Divide, Colorado
 
 
 
I noticed the same thing with mine when we were camping at Big Bend. I figured it must be something like that. Good to hear an explanation.
 
Joined
Oct 8, 2004
Messages
459
Location
Long Island, NY
 
 
 
Glad I found this. Mine (1985) does the same thing, even as it sat for days...Low fuel, not much in the tank. Lots of vapor-makes perfect sense
 

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