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Crankcase Ventilation

Discussion in 'Flat Fender Tech' started by Dick Harding, Feb 4, 2009.

  1. Feb 4, 2009
    Dick Harding

    Dick Harding Member

    Joined:
    Nov 3, 2006
    Messages:
    65
    I have a Chevy 283 in my 52 M38. The engine has been rebuilt and am connecting up hoses. There is a can at the back of the engine block for crankcase ventilation and there is also a PCV valve in the valve cover. Do both of these hoses go to the connection at the base of the carburetor?
     
    Last edited: Feb 4, 2009
  2. Feb 4, 2009
    bobo

    bobo Sponsor

    canby or
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    Aug 12, 2008
    Messages:
    69
    Sounds like you have an early 283 (before pcv) if thats the case You dont need that can at the back of the block. Does it have bolt through the pipe on the rear of the block? If so just remove the can and pipe and plug the hole and use the valve cover pcv.
     
  3. Feb 5, 2009
    Bucket of Bolts

    Bucket of Bolts Broke Member

    Dinuba, Ca.
    Joined:
    Jun 3, 2006
    Messages:
    60
    pcv to carb base. hose from can at back of block to air cleaner base
     
  4. Feb 5, 2009
    Dick Harding

    Dick Harding Member

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    Nov 3, 2006
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    65
    Sounds like I should remove the can and plug the hole as I do not have that type of air filter. Much smaller because of clearance between carburetor and hood. What about a tee off the base of the carburetor and bring both hoses to that point?
     
  5. Feb 8, 2009
    kaiser_willys

    kaiser_willys Well-Known Member

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    i have this setup in my pickup, and the early early version used a draft tube from there to the bottom of the vehicle, the later early version sounds like what you have , used a pcv valve with 2 hoses, one to the carb, the other to the back of the block, kinda like a inline fuel filter setup, the valve covers on these engines had no hole, rather a breather tube in the front of the intake manifold, that served as both the breather,and the oil fill, last used in 1967 if i recall corectly, you can plug it, or use it, and put a breather filter type cap in the valve cover/covers
     
  6. Feb 8, 2009
    mknittle

    mknittle jeep addict

    auburn ca
    Joined:
    Apr 16, 2006
    Messages:
    24
    PCV carb, can or valvecover opposie of the PCV to any good filter I use a K&N. your valve covers are newer than your block. the old ones vented through a open tube down by the bellhousing! they could be and were messy oil film attracts dust!
     
    Last edited: Feb 8, 2009
  7. Feb 12, 2009
    kaiser_willys

    kaiser_willys Well-Known Member

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    Jan 7, 2007
    Messages:
    1,524
    early version(draft tube) :iagree: does yours have a cap that mounts to the hole with 1 bolt thru the middle and a hose fitting off to the side? if so you can do what i said earlier,or cap it and run the setup like the newer sbc's use
     
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