Where is the PCV valve on a Chevy Silverado?
Open the hood of the Silverado and locate the PCV valve on the driver side rear corner on top of the valve cover. The valve cover is positioned behind the spark plug distributors. The valve is connected to a thick hose and is seated in a rubber grommet.
What does a PCV valve do?
Essentially, a PCV valve controls emissions — it takes the gases produced by the crankcase and routes them back into your engine’s combustion chambers to be safely burned without harming your vehicle or the environment. This prevents the crankcase from developing engine-damaging oil sludge.
Where is my PCV valve located?
valve cover
A PCV valve located in the valve cover. It may be located on or near the intake manifold, as shown here. A PVC valve located on the valve cover, with the hose that leads to it removed. A hose leading to the PCV valve is often kept in place by a clamp.
How do you check if PCV valve is working?
One way to check whether a PCV valve is functioning is to remove it from the hose or tube and shake it. If you can hear a metallic rattling noise, it’s likely in good working order. If you do not hear anything when you shake the valve, it is likely that it is no longer opening and closing like it should.
How often should PCV valve be replaced?
between 20,000 to 50,000 miles
Car manufacturers suggest that PCV valves be cleaned or replaced somewhere between 20,000 to 50,000 miles of driving. Consult your owner’s manual to see where the PCV valve is located on your vehicle and what the recommended service intervals are.
What does a bad PCV valve sound like?
Noise from the engine If you hear a hissing sound from the engine, it is time to get your vehicle looked at. The PCV valve hose may have a leak in it, which is causing the hissing sound. Leaving this for too long can cause misfires, rough running, vacuum leaks and you will have a more extensive repair on your hands.
How can you tell if a PCV valve is bad?
What happens if a PCV valve is stuck open?
It forces oil past the engine’s seals and gaskets. A stuck open PCV valve or leaking hose results in a large vacuum leak, a rough idle, and drivability issues like surging. A closed or tarnished PCV valve can cause engine oil to back up into the breather.
Will a PCV valve cause engine knock?
This is due to oil seeping past intake valves seals as well as the PCV valve (crankcase ventilation). The sum of all these factors will decrease combustion efficiency and produce engine knocking.
The PCV valve is located at the rear of the engine on the side nearest to the brake fluid reservoir. The PCV hose is the widest of the three hoses in this location (the two thinner hoses are connected to the firewall). Follow this hose to the valve cover and pull out the hose with attached PCV valve. Then remove the PCV valve from the hose.
How do you remove a PCV valve from a hose?
The PCV hose is the widest of the three hoses in this location (the two thinner hoses are connected to the firewall). Follow this hose to the valve cover and pull out the hose with attached PCV valve. Then remove the PCV valve from the hose.
How does the positive crankcase ventilation ( PCV ) valve work?
Since the pressure in the intake manifold is always lower than the pressure inside the crankcase, the fumes naturally flow into the intake valve where the gases are recycled and contribute to the combustion process. The Positive Crankcase Ventilation (PCV) valve is what allows this ventilation process to occur.