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240Z gas return line?


gmkeegan

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If it has one yes. But...

 

I don't think there were return lines until '75 and the EFI L28s.

 

The will be a tank vent for fume collection. Don't confuse this with a return line.

there are two lines running from the tank up to the carbs i thought the one was a fuel line and the other was a return line.. i could be wrong 

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I think the SU's only had an incoming fuel line.

 

Early system

Engine off, non vented fuel tank cap. When evaporated fumes built to a certain pressure level, a valve allowed them into the engine crankcase for storage. Next time the engine is started the PCV draws these fumes into the intake and they are burned. At the same time as the gas tank empties air travels into the tank to replace the fuel removed. The left inner fender will have a flow guide with three hoses to it. One from the tank (vent) one to the crank case vent pipe (left side of block behind the exhaust manifold that goes to the PCV) and one to the air filter so return air is filtered.

 

Later models stored the fumes in a charcoal canister.

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