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Speedkar99 on YouTube
2003 Camry
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1,892 Posts
Discussion Starter #1
I cut open a gas tank and EVAP canister to see what’s inside and how it works. I made a short video on the process, you can check it out here:


Here are a few photos of the teardown:
The EVAP canister is located behind the gas tank:

The gas tank is held on by two straps. Boy was there a lot of rust on this Corolla! Down comes the tank:



One bolt for the filler neck:


Gas tank, EVAP canister removed:


Here’s what some of those vacuum lines do:

Vacuum lines on the gas tank:

Here’s an overview of the EVAP system. Its basically there to vent gasoline vapors and catch it in the charcoal canister. Its held there until its released into the car’s air intake to get burned by the engine.

EVAP float to ensure liquid gas doesn’t go into the charcoal canister:

Here’s the gas tank chopped open:


Vapour pressure sensor. ECU uses this for self-diagnostics. That’s why it’s so difficult to pass emissions tests!

Fill check valve. This controls the ventilation of the gas tank while refueling.


Its pretty cool inside, there’s a diaphragm that works with air pressure.

It allows vapor to move in one direction only

Chopping open the charcoal canister:

Tiny beads of activated charcoal:

Which gives me an idea…Barbeque anyone?
 

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short-throw dipstick
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6,242 Posts
Mmm, Proposition-65 ribs...

 
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Mod. Break. Fix. Repeat.
2001 Corolla CE
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299 Posts
Dude I love these threads :) I'm always excited to see what you'll cut into next

Part of me always thinks "that poor Corolla" though lol
 

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Speedkar99 on YouTube
2003 Camry
Joined
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1,892 Posts
Discussion Starter #7
Nice job. Interesting system. :)
nice job... essential info if you drive in Cali...


:)
Looks like you know something about cars ....Good job!
Thanks guys! I sure do learn a lot by taking things apart.

Dude I love these threads :) I'm always excited to see what you'll cut into next

Part of me always thinks "that poor Corolla" though lol
Glad you enjoy them. Sometimes I don't even know what I'll tear into next. Suggestions are always welcome!
I'm having fun cutting this Corolla up. Sure you might feel its a waste - but it would be more of a waste to send this car to the scrap yard intact (where there are tons more Corolla's sitting) and just have them crush it.
 
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