Does anyone know where the PCV valve is located on a 2000 2.4L.... I need to replace it and am not sure exactly where it is located. Also any other info about replacing this would be appricated.

Thanks, Chris



2000 z24 Cavalier

General Motors decided instead of putting a Positive Crankcase Ventilation (PCV) Valve in the LD9, they put in an Oil/Air Separator.

why do you think you need to replace it?

because i'm burning oil and my car is ideling high...it was just a thought because i learned about it in class yesterday ... if it's not that i'm thinking its the o2 sensor.... any idea about what else it might be???

___Chris



2000 z24 Cavalier

Replacing your Oil/Air Separator

haha yea where is it located?? .... is it a very easy job??

__CHris




2000 z24 Cavalier

Its easy if you have some skill with a ratchet, the Oil/Air Separator is located Under the Intake Manifold. So basiclly you need to remove TB and intake manifold. Get a Haynes manual it makes it very easy. Its hard to explain the location of this item since i have no pics...

How much oil are you burning?? Enough to make blue smoke?

A little oil used between changes is normal on a 2.4L. I would usually be a quart low every 5,000 kms.

John Lenko wrote:How much oil are you burning?? Enough to make blue smoke?

A little oil used between changes is normal on a 2.4L. I would usually be a quart low every 5,000 kms.

quart? that seems like a bit much to me i barely loose anything between changes.

yea i lost a quart or so with in the first 3000 kms after the oil change..... and i do have a slight knock some times like after drive hard.... but it seemd to have disapeared when i got this hiigh idle. my prodections are that its either the oil/ air seperator or a faulty o2 sencor causing it...so i'm gonna try replacing the oil/air seperator first... Also my exhaust manifold is leaking could that cause the o2 sensor the get a bad reading, causing the high idle problem???
















2000 z24 Cavalier

]Considering that an O2 sensor measures the O2 content of the exhaust and then transmits that signal to your ECM, a leak in you manifold would definitely cause a bad reading from the sensor. This "could" cause you to have a high idle due to computer being told (possibly incorrectly) that not enough O2 is traveling through the engine. Also taking into consideration that the manifold gasket is only $8.00 at autozone, it wouldn't hurt to replace that before you go spend way more on O2 sensors. As far as the oil/air separator, it is located on the front of the engine block, under the left side of the intake manifold. If your burning oil and you don't have a head gasket problem, then you should be on the right track. Post up if this fixes the problem. I would like to know since I burn through about 3/4 quart in between changes. Good Luck!

The 2.4L has an oil air seperator. These don't go bad. It's just a baffle on the side of the block. The actual crankcase vent is through a port in the cylinder head.

The car idling high could be a vacuum leak. How high is the idle?

Also, is the exhaust manifold leaking at the flex pipe?

Ben Harel wrote:

John Lenko wrote:How much oil are you burning?? Enough to make blue smoke?

A little oil used between changes is normal on a 2.4L. I would usually be a quart low every 5,000 kms.

quart? that seems like a bit much to me i barely loose anything between changes.

hahaaha, I work at a VW dealer and we deal with a certain amount of oil consuption problems. VW says 1 quart every 1K miles. (something around there) So when it's time for its next oil change, it could be out of oil.