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| PCV chatter--Why? https://www.slantsix.org/forum/viewtopic.php?t=3772 |
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| Author: | oldmopars [ Sun Jun 16, 2002 9:52 am ] |
| Post subject: | PCV chatter--Why? |
I was working on my &5 Duster the other day and noticed that the PCV valve was chattering. I pulled it out of the VC and plugged the hole with my thumb. It smoothed out the idle and stopped the chatter. I now have it plugged off, but why does it do this? Is this normal(I do not think it would be)? What would cause this? It is a new Fram PCV Valve, the carb is a Holley 2brl on a Super Six manifold. It runs real nice at idle now with it plugged. Whats up? scott.solomon@mcchord.af.mil |
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| Author: | Chuck Rivers [ Sun Jun 16, 2002 10:58 am ] |
| Post subject: | Re: PCV chatter--Why? |
Quote:
: I was working on my &5 Duster the other day and : noticed that the PCV valve was chattering. I : pulled it out of the VC and plugged the hole : with my thumb. It smoothed out the idle and : stopped the chatter. I now have it plugged : off, but why does it do this? Is this : normal(I do not think it would be)? What : would cause this? It is a new Fram PCV : Valve, the carb is a Holley 2brl on a Super : Six manifold. It runs real nice at idle now : with it plugged. : Whats up? I would suspect that the vacuum is not constant to the PCV valve. I have seen this when there is a bad intake valve that allows compression to leak past the valve and push the PCV valve closed. Chuck webmaster@omnipages.com |
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| Author: | oldmopars [ Sun Jun 16, 2002 12:18 pm ] |
| Post subject: | Re: PCV chatter--Why? |
Quote:
: I would suspect that the vacuum is not constant : to the PCV valve. I have seen this when : there is a bad intake valve that allows : compression to leak past the valve and push : the PCV valve closed. : : Chuck The strange thing is that it does this with the PCV valve out of the valve cover. scott.solomon@mcchord.af.mil |
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| Author: | Chuck Rivers [ Sun Jun 16, 2002 8:58 pm ] |
| Post subject: | Re: PCV chatter--Why? |
Quote:
: The strange thing is that it does this with the : PCV valve out of the valve cover. Of course, the pressure that makes it chatter comes from the carb if there is a valve problem. Do a compression check. Chuck webmaster@omnipages.com |
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| Author: | bud L. [ Sun Jun 16, 2002 10:25 pm ] |
| Post subject: | Re: PCV chatter--Why? |
This happened to a buddy of mine. He has a '64 Dodge convert with a 300 HP 360 crate motor. He went to the parts store and looked thru the parts books and found another pcv valve with a different spring, and it cured the problem. If I can remember to ask him, I'll find out the application. Quote:
: : Of course, the pressure that makes it chatter : comes from the carb if there is a valve : problem. Do a compression check. : : Chuck fglmopar@aol.com |
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| Author: | Daniel J. Stern [ Tue Jun 18, 2002 9:16 pm ] |
| Post subject: | Re: PCV chatter--Why? |
If Fram's build quality and quality control on their PCV valves is as poor as it is on their oil filters...then a quick and easy change to a Mopar PCV valve might clear it up. redbear@vrx.net |
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| Author: | JesMat5243 [ Tue Dec 14, 2021 5:24 am ] |
| Post subject: | Re: PCV chatter--Why? |
PCV valves are a crap shoot these days. I went through three trying to stop the chatter. Finally found an old metal style off a slant in the junkyard. Put it in now no more chatter. |
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| Author: | Louise76 [ Tue Dec 14, 2021 7:20 pm ] |
| Post subject: | Re: PCV chatter--Why? |
Had the same noise. Cheap PCV valve-try a different brand. Fixed it. |
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