Gas fill-up overflow drain tube
#1
Lexus Champion
Thread Starter
Gas fill-up overflow drain tube
Occasionally the automatic shut off for the gas pump fill nozzle does not respond fast enough to avoid spillover into the gas cap door overflow pocket.lol
Last this happened, I detected faint smell of gasoline in car.
Decided to remove the trunk side quarter panel trim cover to investigate.
The spillover tube was completely flat atop rear wheel well and was too age-hardened to resuscitate...so ordered a new tube and through chassis grommet from Lexus
Drain hose P.N. 90446-09015 and chassis grommet P.N. 90480-22022. ( 22022 molded onto grommet)
Black overflow tube from gas tank neck overflow pocket smashed flat atop wheelwell...
Drain tube extends vertically to chassis through-hole grommet Clear tube on right is for moonroof drain.
Last this happened, I detected faint smell of gasoline in car.
Decided to remove the trunk side quarter panel trim cover to investigate.
The spillover tube was completely flat atop rear wheel well and was too age-hardened to resuscitate...so ordered a new tube and through chassis grommet from Lexus
Drain hose P.N. 90446-09015 and chassis grommet P.N. 90480-22022. ( 22022 molded onto grommet)
Black overflow tube from gas tank neck overflow pocket smashed flat atop wheelwell...
Drain tube extends vertically to chassis through-hole grommet Clear tube on right is for moonroof drain.
Last edited by YODAONE; 02-11-18 at 04:20 PM.
#2
Moderator
iTrader: (7)
that overflow pocket is mainly a water drain line that drains to the pavement, and is not meant for gas spills.
there is a secondary breather tube parallel to the main fill spout that needs to be clear at all times, and recirculates back to the tank.
if you are experiencing backsplash it's another problem, such as the nozzle not pushed far enough into the fill spout or a bad nozzle.
in CA our nozzles have a vapor guard on them that acts like a catch or block to prevent backsplash. it should cover the entire mouth of the fill hole.
there is a secondary breather tube parallel to the main fill spout that needs to be clear at all times, and recirculates back to the tank.
if you are experiencing backsplash it's another problem, such as the nozzle not pushed far enough into the fill spout or a bad nozzle.
in CA our nozzles have a vapor guard on them that acts like a catch or block to prevent backsplash. it should cover the entire mouth of the fill hole.
#3
It is indeed a gas drain for overflow situations so you don't burn that pretty paint. Just about every car dumps fuel directly to pavement inside of the body surface if you get an overfill. It falls under "de minimus" hc emissions and it is allowed under law. The parallel line back to the tank does help the fuel nozzles "breathe" as they fill the tank and displace a large quantity of fuel-laden air.
#4
Lexus Champion
Thread Starter
It is indeed a gas drain for overflow situations so you don't burn that pretty paint. Just about every car dumps fuel directly to pavement inside of the body surface if you get an overfill. It falls under "de minimus" hc emissions and it is allowed under law. The parallel line back to the tank does help the fuel nozzles "breathe" as they fill the tank and displace a large quantity of fuel-laden air.
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