Where is the PCV valve located on the Baojun 730?
2 Answers
The PCV valve of the Baojun 730 is located inside the crankcase. Here are the specific details: Function of the PCV valve: During the end of the engine's combustion process, some unburned mixture leaks into the crankcase from the piston rings under high pressure. These blow-by gases can escape into the atmosphere, causing pollution. If these gases are not expelled, they can dilute the engine oil in the crankcase, leading to oil degradation and premature wear of engine components. Therefore, a PCV valve is installed on the valve cover to allow these exhaust gases to re-enter the engine through the intake manifold for re-combustion. Working principle of the PCV valve: The PCV valve is controlled by vacuum. When the engine is idling, the intake manifold generates vacuum, which overcomes the spring force to hold the plunger in place, preventing the flow of exhaust gases. At high speeds, the spring force presses the plunger, also preventing the flow of exhaust gases. At medium speeds, the vacuum suction from the engine's intake manifold overcomes half of the spring force, causing the plunger to oscillate within the valve body, allowing the exhaust gases to flow into the intake manifold.
For that Baojun 730's PCV valve, I recommend opening the engine hood to locate it. It's usually installed on the top or side of the valve cover and connected to the intake manifold via a hose. If it's the 1.5L engine model, the position is slightly towards the left side of the top. Just use a flashlight to spot that small valve, which looks like a little plastic or metal plug. The PCV valve is responsible for venting exhaust gases from the crankcase to prevent excessive pressure that could damage the engine. If it malfunctions, the car may experience unstable idling or oil leaks, which can be quite bothersome. Always ensure the engine is turned off and cooled down before inspection—safety comes first. For detailed diagrams, search online for the Baojun 730 manual or forums where owners often share photos to help pinpoint the location. Remember to clean off dirt regularly; just spray it with carburetor cleaner, and avoid using excessive force to pry it open to prevent deformation and the need for replacement.
