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Thread: '54 322 Blow-by

  1. #1
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    Question '54 322 Blow-by

    Hi folks,

    So I got some concerns about my old nailhead.
    It has some serious blow-by issues from all openings: breather, valve cover bolts, dipstick,...you name it and it blows. :/
    It doesn't burn any oil, but manages to lose about 1qt every 200-ish miles.
    So my guess is it's time for a rebuild. It has 96000+ miles on the odometer but my guess would be more 196000+...

    The plan for now is to pull one of the heads and see how bad the wear is and go from there.

    Now since I am in Belgium parts are not that readily available, so I want to get everything right from the first time.
    Is there anything special to consider for a basic rebuild? I would guess: new rings, new gaskets, leave the crank in place,...
    (from googling I would think centerville-auto is a good place to order everything?)
    How badly will a '54 nailhead usually be worn out after such mileage?
    If the block has to be bored will I need new pistons for sure?

    It already has a new cam, lifters, pushrod, and rockers.

    I think I might be too optimistic on how this is going to go, so any and all opinions, suggestion, ideas,... are welcome!



    Grtz from Belgium,
    James

  2. #2
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    Cool Blow by

    James,


    Sounds like you you have a pressure problem .
    Back in the 70s someone came up with an idea to remove smog from our cities. It entailed adding about a 5 dollar part called the PCV valve,!!!!
    I can help you. The first thing I would do is remove the smog tube from the back of your engine and install a PCV valve with a vacuum line to your engine.

    This should save you a lot of headaches, especially since you are talking about removing heads!

  3. #3
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    50s car with 100,000 miles are almost certainly worn out. I would expect you will want to purchase new pistons. I would also rebearing the crank and change the cam bearings.


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  4. #4
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    Quote Originally Posted by Interceptor 55 View Post
    James,


    Sounds like you you have a pressure problem .
    Back in the 70s someone came up with an idea to remove smog from our cities. It entailed adding about a 5 dollar part called the PCV valve,!!!!
    I can help you. The first thing I would do is remove the smog tube from the back of your engine and install a PCV valve with a vacuum line to your engine.

    This should save you a lot of headaches, especially since you are talking about removing heads!
    Thanks for the insight, I've been reading on PCV-systems for a bit and think it's worth a try before I do anything else.

    So basically I should run the vent tube that goes to the underside of the car through a PCV-valve and send it through the engine controlling it with vacuum...2 questions:
    1. Does it matter where I run the vacuum line from?
    2. Do I need to put a different cap on the filler up front?



    Thanx,
    James

  5. #5
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    A PCV valve will not remedy the kind of blow-by you are describing.

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