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Technical 1963 327/300hp with Powerglide

Discussion in 'The Hokey Ass Message Board' started by a50merc, Oct 8, 2017.

  1. I have a small Problem with my engine I rebuild the Carb awhile Back
    AFB 4barrel & put on a New PCV valve.
    the Engine Ran much Better but then I started to Burn Oil from the
    Right Bank.
    so I changed the PCV valve back to the Original which was Good but it Continued
    to burn oil on the Passenger Side
    so I asked a Friend of Mine which is a Mechanic & Drag Racer to check the Carb. for me
    and He said he took it apart & everything was alright
    The other day I played with it some more & I found the Metal Hose was
    Not all the way in the Hole in Back of the Engine and I though
    that I must have Konck it off Since I was Changing the Points (dual point)
    Well Guess what No More Burning oil on the Right Bank
    Now it Burning on the Left Bank, & if I leave the Metal Tube Resting on the Back
    of the Engine it Dos not Burn any Oil
    so what is the Problem???
    Do I have to take the Entake manifold off to see if the Can that is for the
    PCV set up Cloged or Broken or What.

    Just my 3.5 cents

    Live Learn & Die a Fool
    302GMC likes this.
  2. jcmarz
    Joined: Jan 10, 2010
    Posts: 4,633

    from Chino, Ca

    You have the draft tube (that metal hose) AND a PCV valve, which is meant to replace the the draft tube. Only one system is used, so plug the hole in the back or remove the PCV and see what happens.

    Sent from my SM-J700T1 using The H.A.M.B. mobile app
  3. The PCV valve comes off the Back of the Carb & goes to the Metal Tube that
    goes to the Back of the Dist.

    Just my 3.5 cents

    Live Learn & Die a Fool
  4. squirrel
    Joined: Sep 23, 2004
    Posts: 49,258


    I'd need to see some pictures, to figure out what you have there....

  5. DDDenny
    Joined: Feb 6, 2015
    Posts: 15,046

    from oregon

    What do you mean by "resting" on the back of the engine?
    They are held on by a long 1/4" bolt.
    Dave Downs likes this.
  6. Squtrrel Thats going to be Very Hard sines I Don't have a Cammera or a
    phone that takes Pictures

    Here Goes the Back of the Carb is where the PCV connection is Made
    there is a T fitting that 1 goes the the PCV & the other whent to the
    Power Brakes which the Pcv goes to a Hose and than a Metal Hose
    that goes the the Back of the Engine

    Just my 3.5 cents
  7. DDDenny The Metal tube is about 1/2" in Dia. and goes into a Metal pieces
    that is about 2" that held in by a 1/4" bolt

    Just my 3.5 cents
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 49,258


    Is there an oil fill tube at the front of the engine, going into the intake manifold? and if so, is there a breather cap on this tube?

    Do the valve covers have any holes in them for breathers?

    Do you know if the baffle can is inside the engine? it would be under the intake manifold, at the back of the block, stuck in a hole that meets up with the hole in the back of the block, that that metal fitting with the 1/4" bolt goes into.
  9. squirrel Yes there is a Tube at the Front of the Engine where you Put
    Oil in & it has a Breather on it
    No Holes in the Valve Covers
    & Yes it has the Can under the intake Manifold in the Back of the Engine

    Just my 3.5 cents
  10. Squirrel any Idea's that is causing this Problem..??

    Just asking


    Just my 3.5 cents
  11. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,271


    When the tube is not hooked up do you have a lot of blowby coming out of the oil filler? And I would try another PVC valve.
  12. Oilguy
    Joined: Jun 28, 2011
    Posts: 533


    It should look like this.

    Attached Files:

  13. saltflats
    Joined: Aug 14, 2007
    Posts: 10,824

    from Missouri

    You may need to pull the intake and see if the baffle can is in there.
  14. Thanks to ALL you Guys that have Reply'ed to my Problem
    I have tried another PCV valve & it was the Same
    and if the Tube is Not Hoked up there is No Blow Buy
    So I guess I will have Pull the Manifold to check the Baffle Can
    I hope that I can get some help with the Manifold, you must know
    when you Get Old everything starts to Hurt Big Time
    Since I have been working on Cars & Truck's for over 45 Year's
    I am 83 and trying to keep Going!

    Just my 3.5 cents
    vtx1800 and rjones35 like this.
  15. saltflats
    Joined: Aug 14, 2007
    Posts: 10,824

    from Missouri

    You may be able to use a wire and see how for it will go through the hole.
    Some aftermarket intakes don't have room for the can.
    Is the intake a factory part or aftermarket?
  16. saltflats its All Original the Last time I took the Manifold off was
    48 years ago & the Can was still there, would it get Cloged up or something
    like that.??
    This engine was in my 63 Chevy 9 Passenger Sta,Wag Fully Loaded with
    every Option that Chevy Had.!
    and some YO YO decided to Hit me at 85 mph Head on I was going
    to rebuild the Car but instead I Striped it & Put the
    Engine & Tranny into mt 50 Merc back in 76 and I have had no
    problem with it all this Time!

    Just my 3.5 cents
  17. saltflats
    Joined: Aug 14, 2007
    Posts: 10,824

    from Missouri

    I think if it was stopped up then the PCV valve wouldn't cause it to smoke.
  18. Well than I will Change the Valve covers to the ones that have Breathers
    in them & try not to Think about it of course it will Bug the Hell out of Me
    until I figure it out.
    The engine only has about 50K on it now
    Thanks saltflats,

    Just my 3.5 cents

    Live Learn & Die a Fool
  19. saltflats
    Joined: Aug 14, 2007
    Posts: 10,824

    from Missouri

    Just make sure you have the correct PCV valve
  20. There's something up besides a PCV problem. You apparently have a oil getting into the combustion chamber problem. I would do a compression check. Its very hard to diagnose most things without being there. So you do the basics , tune up, compression test, hook compressed air via a spark plug to each cyl with both valves closed and see how much blow by you can artificially create. My guess you have a worn engine or something like a burnt piston or broken rings. If you are having problems with the PCV in the stock factory location. Moving the PCV a few inches right and left into the valve covers aint gonna do nuthin.
  21. You must be working somewhere close to one of those "gravity hot-spots". I've got one of 'em close around my place, too! :p
  22. What the Correct PCV for the Car or for the Valve Covers.??
    If the Rattle Can is Broken away from its Mounting Place
    would that Cause the Problem.??

    Just my 3.5 cents
  23. saltflats
    Joined: Aug 14, 2007
    Posts: 10,824

    from Missouri

    Yes it could.
    I seem to remember the PCV valve screwed into a fitting in the rear of the carb.
  24. salfflats Yes it does its a Brass T fitting I will Pull the Manifold off
    and see whats Going on,
    I can't let it Get the best of me I have to find out what is Going on

    Thanks to everybody Dom.

    just my 3.5 cents
  25. redo32
    Joined: Jul 16, 2008
    Posts: 1,829


    54 year old motor might have hard, brittle & worn valve seals. It's been too long for me to remember, do powerglides have a vacuum modulator? Why it would alternate smoking on different banks has got me puzzled.
  26. And that engine was never intended to run on unleaded gas. Its likely the valves have sunk into the seats and making the valve stems a bit taller. letting the worn portion stick above the guide? possibly needs umbrella type valve seals?
  27. redo32 thats what got me wondering why it would Change sides
    from one side to another by how far the Tube is in the back
    of the Engine
    If I take the Tube out of the Engine & let it lay on the Top of
    Powerglide It Dosent Burn any Oil, yes it has Vac going
    to the Trans.
    Mabey I will play with it in a day or 2

    just my 3.5 cents
  28. Laying tube on top of powerglide? are you plugging the tube? is there any vacuum at the tube. Place you finger over the tube and check.
  29. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 8,018


    I can't help thinking that the power booster and pcv line shouldn't be tied together or if they are then at the carb BEFORE the pcv (meaning a "T" on the carb). Also, i would consider double checking the can for connections or oil inside. I could be wrong.......:).



    Last edited: Oct 9, 2017

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