PCV valve
09-07-2007, 03:59 PM
#1
PCV valve My PCV valve is shot. Do I need the original piece? Are all the PCV valves the same?
Right now I have no PCV valve and I have a direct connection between the intake manifold and the engine. Is that a problem?
Thanks - Stefano
Right now I have no PCV valve and I have a direct connection between the intake manifold and the engine. Is that a problem?
Thanks - Stefano
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09-10-2007, 08:02 PM
#9
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Or, you could ditch the OEM oil fill cap, and replace it with a screw-in valve cover breather. At the rear of your engine, behind the intake, you'll find the OEM balance pipe connecting the valve covers. Following the balance pipe as it comes from the driver's side valve cover, to the passenger's side valve cover, you'll find a one-into-two "Y"; i.e., one line out of the driver's side valve cover, becomes two. Cut off and plug the top line at the "Y", and remove the line that went from the "Y", to the intake manifold, behind the TB. Then remove the line that ran between the TB and passenger valve cover. You'll have to cap off the openings in the intake manifold & TB, or you'll have pretty nasty vacuum leaks. Your crankcase will now be vented, and you should have no problems sucking oil into your intake.
I should mention that GM changed the design of the passenger side valve cover. Instead of provisions for two lines, replacement valve covers have only one. I don't when they did this, or why.
I should mention that GM changed the design of the passenger side valve cover. Instead of provisions for two lines, replacement valve covers have only one. I don't when they did this, or why.
09-11-2007, 05:21 AM
#10
Originally Posted by bichin95redta
Or, you could ditch the OEM oil fill cap, and replace it with a screw-in valve cover breather. At the rear of your engine, behind the intake, you'll find the OEM balance pipe connecting the valve covers. Following the balance pipe as it comes from the driver's side valve cover, to the passenger's side valve cover, you'll find a one-into-two "Y"; i.e., one line out of the driver's side valve cover, becomes two. Cut off and plug the top line at the "Y", and remove the line that went from the "Y", to the intake manifold, behind the TB. Then remove the line that ran between the TB and passenger valve cover. You'll have to cap off the openings in the intake manifold & TB, or you'll have pretty nasty vacuum leaks. Your crankcase will now be vented, and you should have no problems sucking oil into your intake.
I should mention that GM changed the design of the passenger side valve cover. Instead of provisions for two lines, replacement valve covers have only one. I don't when they did this, or why.
I should mention that GM changed the design of the passenger side valve cover. Instead of provisions for two lines, replacement valve covers have only one. I don't when they did this, or why.
09-11-2007, 05:25 AM
#11
Originally Posted by bczee
Without a PCV Valve, your T/B will be sucking oil into the intake, You can use a Catch Can in it's place for now or have them both line with the catch can before the PCV valve.
It's a good thing to have the checkvalve! Or the blower would pressurize the block...
09-11-2007, 06:04 AM
#12
The new PCV valve is only a restriction, right?
No springs, no parts inside, just a plate with a calibrate orifice?
Who knows the diameter of the orifice?
In my case it's easier to install a drilled plate in my existing system than replace the PCV valve.
I saw this picture and I would say the orifice diameter is 2 mm (about 0.08").
Am I right?
No springs, no parts inside, just a plate with a calibrate orifice?
Who knows the diameter of the orifice?
In my case it's easier to install a drilled plate in my existing system than replace the PCV valve.
I saw this picture and I would say the orifice diameter is 2 mm (about 0.08").
Am I right?
Last edited by tici; 09-11-2007 at 09:46 AM.
