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Thread: DIY Fix: Fan fuses blowing/Rocker Boxes leaking! *BIG*

  1. #41
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    I also removed metal sintered air filter from catch can and attached hose with no air filter to outlet hole. This metal filter definitely have a lot of resistance. I just hope no insects or dust will get inside the engine through the open hose





    Last edited by TPEHAK; 09-15-2017 at 05:33 AM.

  2. #42
    Senior Member Chicknstripn's Avatar
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    Glad you found your issue.
    Unfortunately I don't know of any way to replace the front PCV other than an engine rotation. I cracked my front PCV once and was extremely aggravated with the fact that the little bastard need quite a bit of room in order to be removed/replaced.
    I wouldn't try a temporary fix. It would be more of a PITA than cleaning a little oil. If anything just zip tie some cloth, or cotton padding absorbent material, around the base of PCV to catch the mess that sloughs from its nasty gash.
    Also, the valve itself needs to be a one way valve. Do not go through the trouble or replacing it with one you know does not work right.
    Any HD dealer will carry that PCV valve. If anything find the dealer you hate the most, order the PCV and pull a switch-a-roo with the new(but bad) PCV you currently have. There you go, free PCV. I know that's dishonest but obviously the motor company sent some bad ones out to begin with if yours truly is new and doesn't work correctly.

    Also, if you have to worry about bugs getting inside your breather system you really need to think about calling an exterminator! My catch can is a black 5hr energy bottle with two 3/8" holes, drilled opposite each other at the top, and I've NEVER had any critter issues!

  3. #43
    Senior Member Silverrider's Avatar
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    If I am not mistaken I was able to replace the front PVC off my 08 without rotating the engine it was tight but doable. Either it was front or the rear sorry if I have it wrong but I did do one of them.

  4. #44
    Senior Member Chicknstripn's Avatar
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    Quote Originally Posted by Silverrider View Post
    If I am not mistaken I was able to replace the front PVC off my 08 without rotating the engine it was tight but doable. Either it was front or the rear sorry if I have it wrong but I did do one of them.
    I'm about 100% sure it's not possible to remove and replace the front PCV without engine rotation. The rear is easily accessible but the front Id have to see documented proof that it's possible.
    Trust me, I wouldn't rotate an engine or suggest such unless I knew it was the only way.
    However, I've been wrong before. Someone prove me wrong about the the front PCV R/R procedure.

  5. #45
    Senior Member Silverrider's Avatar
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    ok , then it must be the rear , that comes out , Thanks for the clarification, I am sure you are correct. My friend.

  6. #46
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    Anyone know what kind of gasket for rocker box cover they use here? https://www.twinmotorcycles.nl/artik...cid=20&aid=699

    It is black and does not look like red color James Gaskets. They say it is stiffer than original gasket




  7. #47
    Senior Member Silverrider's Avatar
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    They look like ,Cometic Gaskets. they are black in color . Many to be found also James gasket sets and Cometic sets excellent as well. i see them on E bay at good prices.
    Last edited by Silverrider; 09-17-2017 at 02:35 PM.

  8. #48
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    Alright, this morning I rotated the engine again. The front rocker cover gaskets leaks, the rear leaks too. So this is not only PCV valve leakage. Crap!






    I just can not trust those James gaskets anymore, they will leak again. So I decided to follow this thread and apply RTV silicone on lower gasket and Hylomar Blue on top gasket. Still do not know which RTV silicone is better to use. RTV black is the most oil resistant and has the best temperature resistance. RTV Blue is the suggested silicone for coating precut gaskets for increasing reliability.


  9. #49
    Senior Member Silverrider's Avatar
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    I cant say what is the best ,I can only say this is what I use, and I have no leaks.
    http://www.devcon.com/products/produ...Gasket%20Maker

    Here is what I been using with good results on my Rocker gaskets and every thing else.


    Ultra Black Max. Oil Resistance RTV Silicone Gasket Maker
    Fast-curing formula. Sensor-safe, low odor, noncorrosive. Fills gaps of up to 0.25" when fully cured. Meets performance specs of OE silicone gaskets. Retains high flexibility, oil resistance properties through use of a patented adhesion system. Temperature range -65F to 500F (-54C to 260C) intermittent. Resists common fluids and excessive vibration.




    KEY FEATURES

    Eliminate costly inventory of cut gaskets
    Easily makes cut gaskets in all shapes and sizes
    Increased oil resistance, non-corrosive
    Metallic black
    Use on rigid or flexible flanges
    Temperature range -65F to 500F (-54C to 260C) intermittent
    Last edited by Silverrider; 09-23-2017 at 09:29 PM.

  10. #50
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    OK, I will probably apply some RTV black on lower gaskets.

    Here is one more finding. Here is the throttle body gasket from James gaskets top end kit after only 3500 miles! The surface faced to the engine is hard as stone and full of cracks! So again it looks like James gaskets is not a good choice. Now I am not surprised why they leak so bad.



    Last edited by TPEHAK; 09-23-2017 at 11:02 PM.

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