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How to choose pcv valve or does it matter

Discussion in 'The Hokey Ass Message Board' started by CHOPTOP_T, Dec 28, 2014.

  1. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
    Member
    from place

    I read something that you should have the proper pcv valve for motor/cam... How do you know? I have a 1968 327 with a mother thumper cam the guy at the auto parts store just handed me one said this will work. Also i have aluminum finned edelbrock valve covers that arent baffled there are post on the underside which looks like you could tap them but the post are directly over the rockers so im afraid if i made a baffle the rockers would come close to hitting it or hit it. The breathers and pcv are screw in so rubber grommet baffles wont seal right im thinking about switching my v. covers altogether even though i like the look of these



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  2. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,516

    gimpyshotrods
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    First, punctuation and capitalization help.

    Second, use baffled grommets.
     
  3. rails32
    Joined: Oct 29, 2008
    Posts: 110

    rails32
    Member

    get a corvette central cataloug , look up 66/67 327s . they had an oil fill tube in the front of the manifold. I forget what year but some had a screw in pcv valve in the oil tube. others had a hose ****** on the tube.run hose to carb.
     
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  4. dorf
    Joined: Dec 5, 2008
    Posts: 1,085

    dorf
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    from ohio

    wrong one may make your crank seals leak ,ask me how I know
     
  5. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Lol I'm sure you found out the hard way.


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  6. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    I have an edlebrock air gap manifold on this 327. So theyre on the valve covers they are the screw in type breather and pcv valve


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  7. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 34,075

    Jalopy Joker
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    pics would help
     
  8. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    I replaced what was there before ImageUploadedByH.A.M.B.1419821112.616943.jpg


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  9. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
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    If that's^^^ also a breather it won't work right.. You need air in in one place and pcv in another...
     
  10. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Breather on opposite side ImageUploadedByH.A.M.B.1419823300.816751.jpg


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  11. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Baffle i made but might just run other valve covers this will be super close to the rockers ImageUploadedByH.A.M.B.1419823452.284655.jpg ImageUploadedByH.A.M.B.1419823476.136965.jpg
    Dont feel super comfortable with it


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  12. CHOPTOP_T
    Joined: Aug 23, 2008
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    CHOPTOP_T
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    It's not a breather its solid (only hole is where pcv is sticking out of) i have a breather on driver's side


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  13. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Added pics


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  14. scrap metal 48
    Joined: Sep 6, 2009
    Posts: 6,128

    scrap metal 48
    Member

    My mistake, you should be fine...
     
  15. 26 T Ford RPU
    Joined: Jun 9, 2012
    Posts: 12,585

    26 T Ford RPU
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    You are on the right track with what you have but I would make the baffle plate twice the size and have it tight at the top, use Loc***e on the screws. The original Chevy baffles fitted between the rockers and had a long path to keep oil from being drawn up, what you have there will allow oil droplets to reach the valve. JW
     
  16. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Thanks i sent you a message


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  17. trollst
    Joined: Jan 27, 2012
    Posts: 2,104

    trollst
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    What I did on my 327 is...I made a plug for the road draft tube where it exits the block, bored a hole in it to fit pcv and used it that way.
     
  18. Fuzzy Knight
    Joined: Jun 8, 2009
    Posts: 11,806

    Fuzzy Knight
    Member
    from Santee, Ca

    Let me tell you those screws will come back to haunt you!!. Have some body weld them in. If those screws come loose you will have a major problem!!!
     
  19. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    This block doesnt have the road draft plug that i recall i know its a 68 327 cause i looked up the casting #'s


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  20. 26 T Ford RPU
    Joined: Jun 9, 2012
    Posts: 12,585

    26 T Ford RPU
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    His block is the large journal 327 not the small journal with the internal baffle can and filler/breather tube. JW
     
  21. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    Theyre haunting me just looking at it I'm gonna run my other v. covers


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  22. 26 T Ford RPU
    Joined: Jun 9, 2012
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    26 T Ford RPU
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    You could do what Fuzzy suggested and weld the baffle on. make a bigger plate from aluminium and plug weld it to the up stands. JW
     
  23. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    from place

    I ended up putting the so cal speed shop covers i had theyre baffled and its all good ImageUploadedByH.A.M.B.1419837556.857104.jpg ImageUploadedByH.A.M.B.1419837570.861299.jpg


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  24. 26 T Ford RPU
    Joined: Jun 9, 2012
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    26 T Ford RPU
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    They work, you are happy, you can still fix up the others........good ending:D JW
     
  25. CHOPTOP_T
    Joined: Aug 23, 2008
    Posts: 192

    CHOPTOP_T
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    from place

    Exactly ill put em the so cal box and leave on the back burner for a while


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    26 T Ford RPU likes this.

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