Never replace a PCV valve simply because it ‘looks dirty.’ All used PCV valves look dirty. Below, we’ll show two ways to check the condition of your PCV valve.

Before the PCV valve was invented, engines would use ‘downdraft’ or ‘road-draft’ tubes to ventilate the crankcase. As the vehicle drives down the road, a low pressure zone is created at ...

The positive crankcase ventilation valve releases exhaust gas and unburned fuel from the engine block into the intake manifold. All engines allow some exhaust gases, unburned fuel and oil to ...

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace ...

First, you need to find the PCV valve. Most of the time, it's installed directly into the top valve cover of the engine. If you have a V8 or V6, it's on one of the valve covers, and depends on the ...

Answer: I don't know your van's model year, but I show the 4.2-liter on the list from 1997 to 2003. The PCV valve should be in a similar location for that year range.

It is well-known that the shift hydraulic system plays a major role in the operation of the stepped automatic transmission. The main functions of the shift hydraulic system are to generate and ...