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Thread: Anyone have a good way of blocking the exhaust crossover ports on FE390 Heads
          
   
   

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  1. #16
    DennyW is offline CHR Member Visit my Photo Gallery
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    Quote Originally Posted by rspears View Post
    Denny, what I'm saying is that those ports can't have anything to do with smoking from oil. The problem has to be a gasket, or machining that has the gaps messed up. Focusing on blocking the crossover ports is missing the point, IMO.
    Ok, but what I was saying in my other post, you need to check that. You can do that by using plasti-gauge, or thick soft paper, and torquing the intake in place. No gaskets. Then, using a simple mic, you can measure any spots that does, or doesn't make a sealing impression. If you hold the thick paper sideways, you can see it also. I understand what you guys are saying, but it's very simple to see where the problem is. You can even check the angles, with a simple angle gauge. That is all I'm trying to say. Plus, he was asking how to seal those ports off.

  2. #17
    jerry clayton's Avatar
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    He may be running headers that will creat a vacume impulse and suck oil into the pipes (if unsealed ports because of angles, fitment,etc letting oil into passage) This vacume impulse doesn't exist with FE type stock exhaust componets-usually
    there is positive pressure in these passages. And--IF it is leaking there you will get exhaust carbon traces into the valley because the exhaust pressure is greater than the intake vacume

  3. #18
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    rspears is offline CHR Member/Contributor Visit my Photo Gallery
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    Quote Originally Posted by DennyW View Post
    Ok, but what I was saying in my other post, you need to check that. You can do that by using plasti-gauge, or thick soft paper, and torquing the intake in place. No gaskets. Then, using a simple mic, you can measure any spots that does, or doesn't make a sealing impression. If you hold the thick paper sideways, you can see it also. I understand what you guys are saying, but it's very simple to see where the problem is. You can even check the angles, with a simple angle gauge. That is all I'm trying to say. Plus, he was asking how to seal those ports off.
    If you really read everything that stotzbotz wrote, he's asking how to seal the crossover ports because he believes that they are the source of his oil leaking into the cylinders. Guys have been sealing crossover ports for ages, but not to cure sucking oil.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  4. #19
    DennyW is offline CHR Member Visit my Photo Gallery
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    Quote Originally Posted by rspears View Post
    If you really read everything that stotzbotz wrote, he's asking how to seal the crossover ports because he believes that they are the source of his oil leaking into the cylinders. Guys have been sealing crossover ports for ages, but not to cure sucking oil.


    Attachment 65934

  5. #20
    jerry clayton's Avatar
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    He believes its the source for leaking into his exhaust

  6. #21
    DennyW is offline CHR Member Visit my Photo Gallery
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    Quote Originally Posted by jerry clayton View Post
    He believes its the source for leaking into his exhaust
    He who ? Original poster ? Well, I tried to give him a way to check, and get both things fixed at once... No one gives very good details, and it's really hard to help when that happens...Driving it every day ? Just when it's warm? Does he live in Alaska ? Things like that.

    ps: To check the gasket sealing, I described that. To block the exhaust cross over, I explained that. What's left to explain? Oh, does he or doesn't he run a heat riser, or headers?

    pss:
    Let me put this another way. I sometimes do not explain things correctly to others. I guess that's me though. My son also makes fun of me sometimes on that issue in a joking manner. I just laugh, and tell him, what do you want from an old guy ?

    He may think that is happening, what Jerry and roger is saying. But, if he simply gets, and applies the method of checking the alignment angles just to be sure. And also at the same time seeing, knowing the surfaces are truly mating up correctly, And, if he then uses the gaskets I talked about, in either the .060, or the 0.120 thickness, that will take care of the alignment issues, and these work very good with Aluminum intakes in sealing, unless something went totally wrong, or was wrong to start with. Secondly, by using the gaskets as I showed, with the metal inside the layers, that will also take care of his heat cross over ports. Thereby curing both things, problems, at once. All that only depends if, he actually has good guide clearances, and the guide seals were installed correctly. If so, he should be all set, with no oil problems.
    Last edited by DennyW; 06-04-2016 at 09:39 PM.
    JL350 likes this.

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