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gamillerman Member
Joined: Apr 21, 2006 Posts: 122 Location: Eden, Georgia
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Posted: Mon Mar 26, 2007 9:00 pm Post subject: Crankcase ventilation valve |
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Question on the crankcase PVC valve that is between the fording valve and the intake manifold; should this PVC valve rattle a bit when you shake it like the ones you have on your car engine?.....after looking at all the information in the TM manuals and parts listings, internal drawings of the valve seem to show that air will always flow through the valve but it appears there is a small piece inside that moves back and forth to cause a restriction in the air flow. THis appears to happen when the fording valve by the intake manifold is closed and the pressure forces the small piece (for lack of a better word) foward restricting the air flow. Is this correct?
Thanks in advance for your help |
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maeserik Member
Joined: Jun 14, 2006 Posts: 226 Location: Wijnegem Belgium Europe
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usma41 Member
Joined: Oct 06, 2006 Posts: 194 Location: Zephyrhills, Florida
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Posted: Tue Mar 27, 2007 7:15 am Post subject: |
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Is that drawing a mod pcv valve drawing or the one that was used in the m sieries? |
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16286 Location: Wisconsin
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Posted: Tue Mar 27, 2007 7:38 am Post subject: |
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That's an instructional drawing.
Here's the M38/M38A1 unit.
And here it is exploded:
As you can see the spring would keep the piston from rattling when you shake it.
All you need to do on these things is just unscrew the end. Watch how the parts come out. Take a photo or make a drawing so you get the 4 pieces back together in the correct order facing the correct way and clean up the parts. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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gamillerman Member
Joined: Apr 21, 2006 Posts: 122 Location: Eden, Georgia
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Posted: Tue Mar 27, 2007 8:27 am Post subject: |
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Thanks Maeseik and Wes. The photos on the manual CD I have are not all that clear but it did kinda look like there was a spring inside. BTW Wes; your photos didnt show for some reason (maybe the same gremlin thats preventing the posting of photos). But I have an idea now of what the inside should look like and will disassemble it tonite and get it cleaned up.
Thanks!! |
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oreo3156 Member
Joined: Jan 22, 2007 Posts: 95
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Posted: Tue Mar 27, 2007 7:37 pm Post subject: |
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I dont even have one on mine. Do you need it? Where does it hook to on the engine? |
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BobW Moderator
Joined: Apr 04, 2005 Posts: 219 Location: Monticello, NY
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Posted: Tue Mar 27, 2007 7:46 pm Post subject: |
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Here is a web page that explains the Willys crankcase ventilation system. The M38 will have an additional fording valve in line. Normally the fording valve will be open and have no effect on the operation of the ventilation system.
http://www.cj3a.info/tech/pcv.html _________________ Bob W. Monticello, NY. 1952 CJ3A, 1952 M38, 1950 CJV-35/U |
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gamillerman Member
Joined: Apr 21, 2006 Posts: 122 Location: Eden, Georgia
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Posted: Tue Mar 27, 2007 8:48 pm Post subject: |
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THanks for everyones help. Got mine apart and found that although it wasnt froze up it was full of crud. Got it cleaned up inside and back together. Going to try to put a couple of photos on this post. Hope it works
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