Photos of most anything can be found using Google. Just go here: http://images.google.com/ Then type what you're looking for. In your case "PCV valve". Put both words in double quotes to avoid hits on just PCV or just valves. Once you're searched, you can select the image size. I find selecting "Large Images" usually yeilds the best photos - better resolution and better imagages since they are likely to be real photos not just small icons, etc.
pcv valves are always located on valve covers (but not all vehicles have pcv valves)
The 2000 Mercury is right at the model change for PCV valves. Some had the valves in a hose under the throttle body. The newer style has no PCV valve at all.
most all pcv valves are located on the valve cover
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You do not adjust PCV valves. You just replace them. Now if you are referring to the intake and exhaust valves, then you need to have this done by a professional. Severe engine damage can occur if this is not done correctly. Only a job for an expert.
Its in between the valves
Yes, all cavaliers from any year have Positive Crankcase Ventilation (PCV) valves.
PCV valves are always located on the valve cover, there will be a hose connecting it to the intake tube.
Yes, both the 6 cylinder and 4 cylinder engines have PCV (Positive Crankcase Ventilation) valves.
pcv stands for(positive crankcase ventilation)it relieves the pressure in the oil pan. it is located on the front valve cover close to the driverside of the vehicle.
Pontiac don't carry pcv valves