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Y-Blockhead · 11-13-2021, 12:11 PM

I had a '55 way back in '66 and yes you were required to have the "Smog Device' connected, in Southern California at least. The Smog Device installers "closed off" (bent) the road draft tube as part of the installation.

There is a filter in the road draft canister that needs to be changed occasionally. If they get plugged they drip oil. Or maybe the gasket where it is bolted to the block is leaking.

I don't remember a valve. They simply blocked off the road draft tube and routed a hose from the oil filler cap to the air cleaner. That way the fumes got sucked back in the carburetor and burned.

Not the best thought out system but it satisfied the powers that be in Sacramento...

11-13-2021, 12:11 PM	#14
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: California pcv ?? I had a '55 way back in '66 and yes you were required to have the "Smog Device' connected, in Southern California at least. The Smog Device installers "closed off" (bent) the road draft tube as part of the installation. There is a filter in the road draft canister that needs to be changed occasionally. If they get plugged they drip oil. Or maybe the gasket where it is bolted to the block is leaking. I don't remember a valve. They simply blocked off the road draft tube and routed a hose from the oil filler cap to the air cleaner. That way the fumes got sucked back in the carburetor and burned. Not the best thought out system but it satisfied the powers that be in Sacramento... Last edited by Y-Blockhead; 11-13-2021 at 01:08 PM.