Crankcase ventilation system (PCV) reduces the content of carbohydrates in the exhaust gases by removing crankcase vapors. This is done by circulating the gases that have broken through into the crankcase and directing them through the air cleaner into the intake manifold.
Such a PCV system is isolated. The gases that break through into the crankcase enter the air cleaner or air intake due to the pressure in the crankcase. Most models do not mix the gases with fresh air or pass the gases through an afterburner trap as is done with conventional systems. There are no conventional PCV valves installed on these models - just hoses. Disconnect the PCV hose from the cylinder head cover.
The main components of a PCV system are the hoses that connect the cylinder head cover to the throttle body or air cleaner. If abnormal operating conditions occur (such as piston ring problems), the system is designed to send an excess amount of blown gases through the crankcase ventilation pipe to the intake system so that the gases can be used in the normal combustion process. It is advisable to check the excess combustion products from crankcase gases circulating through hoses and fittings - they can periodically clog the system and cause an increase in pressure in the cylinder block
Since these models do not use a filter element, it is advisable to check the channels of the PCV system for clogging with sludge and combustion products.