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 valve cover plug for 1958 318" engineJump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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jerrybev |
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Elite Veteran Posts: 689    Location: Winston Salem, N.C. | I need this item. If you have one please contact me. I have attached a picture of my valve cover with breather cap in place on drivers side and also a picture of another 318" engine, 1960-61 thank you Jerry Whitfield picture attached Edited by jerrybev 2021-03-05 4:34 PM (valve cover plug xxxsmall.jpg) (1958 318 breather cap..jpg) Attachments ----------------  valve cover plug xxxsmall.jpg (87KB - 140 downloads) 1958 318 breather cap..jpg (217KB - 145 downloads) | ||
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| 56D500boy |
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Expert 5K+ Posts: 9900   Location: Lower Mainland BC | jerrybev - 2021-03-05 12:18 PM I need this item. If you have one please contact me. I have attached a picture of my valve cover with breather cap in place on drivers side and also a picture of another 318" engine, 1960-61 thank you Jerry: I think what you seek is an early version of the Positive Crankcase Ventilation (PCV) system. The small nipple on that cap would be connected to a rubber hose which was connected to a nipple on the air cleaner. End result was blow-by from the engine would be drawn into the engine and burned. Not sure when they started adding those caps (and hoses to the air cleaner). Because of the smog problem in the Los Angeles basin, the State of California led the charge on implementing air pollution control devices: "The California Motor Vehicle Pollution Control Board (a precursor to the California Air Resources Board) was established in 1960 and began researching how to prevent blow-by gases from being released directly into the atmosphere.[5] The PCV system was designed to re-circulate the gases into the air intake so that they could be combined with the fresh air/fuel and more completely combusted. In 1961, California regulations required that all new cars be sold with a PCV system, therefore representing the first implementation of vehicle emissions control device." REFERENCE: https://en.wikipedia.org/wiki/Crankcase_ventilation_system So that cap on the 60-61 engine might make a lot of sense. You could probably substitute a generic PCV valve that fit the rubber grommet in the valve cover (and then connect the valve to the air cleaner).  Or maybe one of these (paint it black, as needed): https://www.speedwaymotors.com/Mr-Gasket-2054-Valve-Cover-Breather-P... https://www.amazon.ca/Spectre-Performance-4276-Breather-Grommet/dp/B...   Edited by 56D500boy 2021-03-05 5:54 PM | ||
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