intangible3 Posted October 17, 2011 Share Posted October 17, 2011 (edited) I have a 70 240z and I was wondering if I could bypass the breather tank somehow or relocate it. Any suggestions? Edited October 17, 2011 by intangible3 Quote Link to comment Share on other sites More sharing options...
cd1105 Posted October 18, 2011 Share Posted October 18, 2011 I have a 260z and a vapor expansion tank(just like yours except its black and looks a little different). I did a l28et swap and got rid of it(also running no charcoal canister). I believe some models of the 240z didn't even come with the tank(i believe i read it was the Japanese models, someone here can verify for you). I just have the largest breather hose coming from the gas tank(15mm) going directly to the vent/breather tube on the gas filler neck on the inside of the car. This makes it so when your pumping gas the vapors can escape allowing you to fill the tank. Otherwise, if you don't have any type of breather, you will be unable to pump gas. I'm just about to start my turbo swap this weekend so I can't tell you exactly how it work for me but it should be just fine. There's a thread on here that talks about deleting it in depth try searching "Gas/vapor expansion tank." I will try to find the thread and post the link later....... Quote Link to comment Share on other sites More sharing options...
johnc Posted October 18, 2011 Share Posted October 18, 2011 I have a 260z and a vapor expansion tank(just like yours except its black and looks a little different). I did a l28et swap and got rid of it(also running no charcoal canister). I believe some models of the 240z didn't even come with the tank(i believe i read it was the Japanese models, someone here can verify for you). I just have the largest breather hose coming from the gas tank(15mm) going directly to the vent/breather tube on the gas filler neck on the inside of the car. This makes it so when your pumping gas the vapors can escape allowing you to fill the tank. Otherwise, if you don't have any type of breather, you will be unable to pump gas. I'm just about to start my turbo swap this weekend so I can't tell you exactly how it work for me but it should be just fine. There's a thread on here that talks about deleting it in depth try searching "Gas/vapor expansion tank." I will try to find the thread and post the link later....... So, you're only tank breather goes to the filler tube that's sealed tight when the gas cap is installed? Think there might be a problem with that setup? FYI... Keep the vapor can the associated vent hoses. It works very well as long as the vent hoses are in good shape and the connections are tight. Quote Link to comment Share on other sites More sharing options...
EvilC Posted October 18, 2011 Share Posted October 18, 2011 I need to read up on why it is needed again. My 70 car didn't have one installed and I believe on my 71 car I got rid of 2 of the lines and only running one. Quote Link to comment Share on other sites More sharing options...
cd1105 Posted October 19, 2011 Share Posted October 19, 2011 So, you're only tank breather goes to the filler tube that's sealed tight when the gas cap is installed? Think there might be a problem with that setup? FYI... Keep the vapor can the associated vent hoses. It works very well as long as the vent hoses are in good shape and the connections are tight. Sorry, about that. I'm also running the the vent hose off the tank directly to the vent tube on the chassis, up to the engine bay with just a filter on the tube at the end. Vaopr tank removal Write up on how to remove it Quote Link to comment Share on other sites More sharing options...
johnc Posted October 19, 2011 Share Posted October 19, 2011 OK. A vent to the filler tube and a vent to atmosphere is a good way to do it. Quote Link to comment Share on other sites More sharing options...
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