pcv valve? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-09-2005, 11:31 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: May 2003
Location: Grand Rapids, Mi
Posts: 3,244
Thanks: 0
Thanked 0 Times in 0 Posts
L27Buick is on a distinguished road
Default pcv valve?

i noticed on the autozone bags it says to change your pcv or pvc (i forgot what it said) valve every 6000 miles. what is it and what does it do? does a bad one hurt anything?
L27Buick is offline   Reply With Quote
Old 10-10-2005, 01:01 AM   #2
Senior Member
Posts like a Supercharger
 
Join Date: Apr 2003
Location: Florida
Posts: 172
Thanks: 0
Thanked 0 Times in 0 Posts
miles26 is on a distinguished road
Default

That'* a good question, I bought one just for when I needed a replacement, what would be the symptom in changing one.
miles26 is offline   Reply With Quote
Old 10-10-2005, 05:17 AM   #3
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default Re: pcv valve?

Quote:
Originally Posted by L27Buick
what is it and what does it do?
PCV - Positive Crankcase Ventilation valve. This valve allows the lower half of the engine to breath. It'* like a check valve to let air in, and prevents a negative pressure in the crankcase.
markwb is offline   Reply With Quote
Old 10-10-2005, 05:59 AM   #4
Senior Member
Posts like a Supercharger
 
Join Date: Apr 2003
Location: Florida
Posts: 172
Thanks: 0
Thanked 0 Times in 0 Posts
miles26 is on a distinguished road
Default

And when it goes bad, the car delivers what type of symptom?
miles26 is offline   Reply With Quote
Old 10-10-2005, 08:47 AM   #5
Senior Member
Certified GM nut
 
Join Date: Dec 2004
Location: Port Charlotte FLORIDA
Posts: 2,077
Thanks: 0
Thanked 0 Times in 0 Posts
its840 is on a distinguished road
Default

from what i can sorta remeber from school. there realy is no way of telling if it is working or not. but when it goes bad your car will start to get poopy gas milage, and you motor will not have as much power. other then that i dont realy think theres anything else.
its840 is offline   Reply With Quote
Old 10-10-2005, 09:03 AM   #6
Senior Member
Posts like a Turbo
 
Join Date: Oct 2005
Location: Woodbridge, Va
Posts: 263
Thanks: 0
Thanked 0 Times in 0 Posts
SUPRCHRGD is on a distinguished road
Default ?

i noticed that some one had a breather filter on the
pcv valve area..... what does this do ???

will it help or hurt...?


and i noticed that some one has a breather filter over where they pour in the oil...
what does this do?

does it hurt or help????
SUPRCHRGD is offline   Reply With Quote
Old 10-10-2005, 09:25 AM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Purely cosmetic, and it can cause problems.
willwren is offline   Reply With Quote
Old 10-10-2005, 09:31 AM   #8
Senior Member
Posts like a Northstar
 
Join Date: Sep 2005
Location: Dayton, OH
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
imidazol is on a distinguished road
Default pcv

Quote:
Originally Posted by miles26
And when it goes bad, the car delivers what type of symptom?
I changed mine at 80-90 k. But the spring pressure seemed same as new one when I shook it. They can gunk up if your oil'* not changed regularly. Then the plunger inside won't move freely.

If they shake, they're probably okay. Try sucking on the vacuum side and and the plunger closes down to reduce air flow during idle. Try with new one. Mine I changed out was the same.

Just made me feel good to change it and transferred some money to Fram.
imidazol is offline   Reply With Quote
Old 10-10-2005, 11:45 AM   #9
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default Re: pcv valve?

Quote:
Originally Posted by L27Buick
i noticed on the autozone bags it says to change your pcv or pvc (i forgot what it said) valve every 6000 miles. what is it and what does it do? does a bad one hurt anything?
From another post today:

miles26 wrote:
What are the symptoms of a bad PCV Valve?


My '95 FSM lists these:

A plugged valve may cause: rough idle, stalling or slow idle speed, oil leaks, sludge in engine

A leaking valve would cause: rough idle stalling, high idle speed.
bill buttermore is offline   Reply With Quote
Old 10-10-2005, 12:03 PM   #10
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

BTW.. PCV valve is about a $2 item. If in doubt change it and watch out for the o ring in the pcv tube
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
installing 180 stat, pcv valve, and 02 sensor White Lightning 1992-1999 25 08-10-2003 12:38 AM
PCV Valve egladman 1987-1991 2 07-15-2003 11:52 PM
Call me dumb -Where's the PCV valve??? OLBlueEyesBonne 1992-1999 4 07-12-2003 04:41 PM
Lower O-ring for PCV valve size? Kuhl 1992-1999 9 07-03-2003 02:09 AM
PCV valve? 96_Caprice 1992-1999 2 09-21-2002 12:29 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:22 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.