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Where is the Pvc valve on a 1990 740 GL Volvo?

The Positive Crankcase Ventilation (PCV) valve on a 1990 740 GL Volvo is located on the top of the engine, near the front of the vehicle. It is a small, cylindrical-shaped component with a hose attached to it. The PCV valve connects the crankcase to the intake manifold, allowing fresh air to enter the engine and circulate through the crankcase. This helps to remove harmful gases and moisture from the crankcase, which can help to prevent engine damage.