PCV Valve

Tiny
JGMCGONDEL
  • MEMBER
  • 1998 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 145,000 MILES
Where is the pcv valve located and what does it take to change it out?
Monday, April 12th, 2010 AT 12:29 PM

9 Replies

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
There are two 4 cylinders available in the 98 Cavalier, a 2.2L and a 2.4L. Neither of which have a PCV valve, or require positive crankcase ventilation system maintenance. Since I don't know the exact engine size, and the descriptions of operation differ slightly, I will paste both versions. The first is for 2.2L engines;
Crankcase Ventilation System Description
General Description
A crankcase ventilation system is used to provide scavenging of the crankcase vapors. Blow-by gases are passed through a crankcase ventilation oil/air separator into the air cleaner outlet resonator. The oil/air separator is inside the valve rocker arm cover and allows any scavenged oil to be returned to the crankcase.

Operation
The only flow through the oil/air separator is the combustion blow-by, as there is no fresh air inlet to the crankcase. The primary flow of blow-by into the separator is through the openings inside the valve rocker arm cover. The oil/air separator causes oil, which may be suspended in the blow-by gases, to be separated and drain back to the crankcase. The blow-by gases are then drawn into the air cleaner outlet resonator by normal engine vacuum and burned in the combustion process.

And 2.4L;
1998 Chevrolet Cavalier | Cavalier, Sunfire (VIN J) Service Manual | Engine | Document ID: 192483

Crankcase Ventilation System Description
General Description
A crankcase ventilation system is used to provide scavenging of the crankcase vapors. Blow-by gases are passed through a crankcase ventilation oil/air separator into the air cleaner outlet resonator. The oil/air separator is mounted to the engine block and allows any scavenged oil to be returned to the crankcase.

Operation
The only flow through the oil/air separator is the combustion blow-by, as there is no fresh air inlet to the crankcase. The primary flow of blow-by into the separator is through a hose from the timing chain housing. The oil/air separator causes oil, which may be suspended in the blow-by gases, to be separated and drain back to the crankcase. The blow-by gases are then drawn into the air cleaner outlet resonator by normal engine vacuum and burned in the combustion process.
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Monday, April 12th, 2010 AT 10:28 PM
Tiny
CRUSHER66
  • MEMBER
  • 2 POSTS
  • CHEVROLET CAVALIER
Where is the PCV valve on a 2000 Chevy Cavalier? The motor is a 2.2 4cyl.
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
There should be a crankcase vent tube on the valve cover going to the intake and it should be there but I dont have a car infront of me to check

jim
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
CRUSHER66
  • MEMBER
  • 2 POSTS
I have taken the vent tube hose off. The hose is connected to a permanent metal connection on the valve cover. This does not look like a replaceable PCV valve. Can you help further.
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
Best I could do is call up to hq to see
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
LIONHEART4U81
  • MEMBER
  • 1 POST
  • 1993 CHEVROLET CAVALIER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 108,000 MILES
Where is the PCV vave located on the Chevy Cavalier
?
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Its located in the center of the rear valve cover. When replacing it make sure not to pull the hose off of the intake manifold because its hard to get it back on. Hope this helps
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 1991 CHEVROLET CAVALIER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 173,241 MILES
1991 Chevy Cavalier mileage: 173,241. Where can I locate my PCV valve? I bought one at my local auto parts store and I can't find anything that looks like it. There are two hoses that lead into the valve cover. One can be removed to expose a silver tip that somewhat resembles the PCV that I purchased but it seems to be a different size. The other hose, when removed, exposes a plastic piece that can be unscrewed to reveal three or four plastic prongs on the end. Could the PCV go in here?
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Friday, February 1st, 2019 AT 7:51 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
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From what you describe, you found the PCV valve, the one with the silver tip. The auto parts store may have sold you the incorrect part.
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Friday, February 1st, 2019 AT 7:51 PM (Merged)

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