Corolla to Prius gas tank swap

Not always was able to waste some unleaded fuel and create a spill on two separate occasions....

One occasion faulty fuel pump handle did not shut down properly

Second occasion Gen2 dash display did not work and had no prior knowledge of fuel level and caused a spill as well

The evaporative carbon/ charcol filter is primarily to recycle fuel vapors and can be ruined with overflow liquid gasoline fuel

 

Ok I forgot to put in there UNLESS SOMETHING IS BROKEN figured that was easely assumed.

But the statement it absolutely true if there are no other malfunctions.

Posted via the PriusChat mobile app.

 

You are referring to your 2011 Gen 2 Prius. T
his thread is referring to US Gen 2 Prii, the only ones in the world that had that bladder malfunction.

 

No I'm talking almost every car built that has a gas tank and thus needs a vent to let out displaced air from filling tank. It's kinda how things work. Empty gas tank is also a full glass tank just full of air. Can't put liquid and air in same time/space. Thus one has to move in this case the air has to be evacuated out of the way of the in comming liquid and it can not leave easy out of the neck of the tank thus they provide a different pathway that has a valve in it that malfunctions. If stuck closed it will not allow air to leave this shutting off gas pump like gas pump thinks tank is full. The exact complaint you are describing aside from other malfunctions

Posted via the PriusChat mobile app.

 

Raphael,

I am far from an expert on the Gen 2 gas tank bladder, but.....I've always pictured adding gas to a Gen 2 is like filling a balloon with water. Balloon starts in deflated condition. As water is added, balloon expands. If water is drained, balloon contracts. No significant void ever exists.

Perhaps the bladder doesn't act in a similar way, but it has always been my understanding that it contracts to eliminate voids in the tank, to minimizing formation of vapors. It is, afterall, meant to be a practically zero emissions vehicle (or whatever they call it). If the bladder doesn't expand sufficiently while filling, it would provide the same type pressure increase as air pockets not venting out.

I seem to remember this was a problem with some gen 2 models, but not all. Most flexible materials are affected by temperature, but I would not expect cool Florida weather to cause bladder flexibility issues, unless this car just got a crappy tank from the factory. Plenty of Gen 2 cars in Canada that do just fine all year round.

 

Now if you want to be nasty becouse you might still have the problem after you replace the tank .. you can go be nasty to your pets and replace the valve and leave me out of your nasty world.

Posted via the PriusChat mobile app.

 

Nasty?? I didn't see anything nasty here. Am I missing some subtle humor? If not, then this is just a healthy discussion....

I do agree with TMR-JWAP. The bladder is intended to avoid a gas-air interface to avoid volatilizing the gas into vapors that would more easily escape and affect the environment. I have never studied the Prius bladder tank system in detail but do think there is likely some method to equalize air pressure outside the bladder but still within the metal tank. If this were malfunctioning then the bladder would feel the increased external pressure and stop expanding. This could lead to early cut-off of the fuel pump hose.

Someone may have posted a link recently in this thread with more info. I haven't had the time to dig into this though.

I am eagerly awaiting more info on the Corolla tank swap. If it ends up working and is close to a plug-n-play set up I would consider it. My commute totals 122 miles a day and I'd like to not have to stop and refill with 7.5 gallons every few days!

Paul

 

First post reads like he wants to replace tank becouse pump turns off premature. This is more likely the valve not the bladder.

I actually thought same thing on last car I had but turned out to be easy replaced valve.

Posted via the PriusChat mobile app.

 

For Your Info/For What It is Worth

To restate not a fan of the bladder/metal case fuel tank that came with 2004-2009 Toyota Prius Gen 2. If you feel different online ROCKAUTO parts is listing them for the price of $664 plus Federal Express delivery
https://www.rockauto.com/en/catalog/toyota,2009,prius,1.5l+l4+electric/gas,1443573,fuel+&+air,fuel+tank+&+pump+assembly,17130

These bladder tanks are a struggle for one person with out shop resources... basic PIA

 

Mr. River A Man

Kind of hoping once you do complete swap … that maybe you run a tank full of the good stuff like real gasoline . Instead of the fuel I can get around here which is $2.45 gal regular (10 percent ethanol)…..$2.61 gal premium ….and E15 gasoline 15 percent ethanol...… Make that two things really do not like bladder tanks and ethanol smog mandated gasoline fuel. ...Otherwise I have long drive to find some ethanol free gasoline.....

 

That’s a horrible price. Internet price for a brand new one from the dealer is 452.41 at Tracy Toyota.

 

No what is really scary is that the going labor cost maybe $400 or equal parts cost to remove and replace has you at a $1000 or plus to do everything .