Thread: Gas Leak?
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Old 06-06-2020, 06:58 PM   #25
devtec
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Join Date: Feb 2010
Drives: 2015 Subaru BRZ Limited
Location: Bay Area, CA
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Just want to reiterate the importance of seating the pump gasket properly before placing the canister and tightening the lock ring.

Replaced my fuel pump last weekend, and was marveling at how easy the whole thing was. Took less than 45 mins going slow. Only difficulty was placing the canister back in the tank, and A LOT of hammering to get the lock ring tight with all the markers lined up.

Turns out I was left with a pretty significant leak after filling up the tank. I took things apart again and tried to reseat the gasket and canister, but this time with the tank full... BIG MISTAKE, as fuel was overflowing everywhere!! Thinking wow this is not good as tried to force that bastard back in... Fuel splashing up in my face. Wow, not safe at all! Got through it and car was driveable, but still with a small leak.

Found this thread, and can confirm that YOU HAVE to separate the gasket, seat it first around the fuel tank inlet, then drop the canister in. This time, the canister dropped in like nothing, and I was able to easily and smoothly tighten the lock ring with much less hammering. Markers also lined up much more easily.

Found one side of the inner lip of the gasket was shredded/broken off from my first time around doing it wrong.

Holding seal now, but new gasket is on order...


Funny thing... when I was replacing pump first time around keeping things all neat and OCD, my 9yr old boy walked up to the car (despite my yelling at him to stay back) and said:

"Daddy, is that toilet in the back of the car?" Hahaha...
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