1964 PCV restoration
My 1964 327/300 ( car # 9356) had the PCV system removed and I wish to restore it. I am waiting for a new oil filler cap as it had a push in breather cap fitted. I have the fittings from the oil filler tube to the back of the AFB carb, the rear breather tube is there but cut a little shorter and blanked off. My question is : Should there be a valve in the rear breather tube from the crankcase to the air cleaner to stop from sucking oil mist into the engine or will the closed crankcase (new cap) reduce that ? The reason I ask is I hooked everything up, but I still had the breather oil filler tube cap, and as I suspected, the flow through made my spark plugs black and greasy very quickly. I also wonder if the fuel mixure may have been changed when the line from the filler tube to the back of the carb was blanked off. I hope someone has some experience with this, Thanks, Robert, NZ
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Re: 1964 PCV restoration
No restriction in the tube from the rear of the engine to the air cleaner, just a screen onver the pipe where it is inside the aircleaner housing. Do you have the oil/vapor seperator installed in the valley of the intake under the manifold? Also, the closed cap and the line into the back of the carb from the front fill pipe are necessary to reduce pressure buildup in the engine and make the use of a restriction unrequired.Bill Clupper #618 -
Re: 1964 PCV restoration
Robert:
On my '65 300hp car, which I believe has the same PCV setup as yours, there is no valve in the breather tube from the block to the air cleaner base. The air flow direction is into the block though this tube. The vapors are drawn into the AFB 3720/3721 carb via the hose connected to its rear fitting.
With the new filler tube cap, you should get proper crankcase ventilation. If the plugs still load up, then there's another issue to sort out. Make sure you have the correct heat range spark plugs. AC45's have worked very well for me. Sets come up on Ebay often.Comment
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Re: 1964 PCV restoration
Thanks very much William and Mike, that was the information I need, Cheers from NZ
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