Valve Cover Venting MGB18G Engine

Author: A. Henderson

These engines used on 1962 and 1963 cars did not have a PCV Valve.   Crankcase pressure was vented through a road draft tube from the front tappet cover, and through this simple rubber hose connecting the valve cover to a port on the front air filter backing plate.  Vaccuum created by the carburetors pulling air into the engine pulled vapour from the valve cover/crankcase.  The air filter backing plate for this application is unavailable, as is the valve cover itself.


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