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  1. #1
    rob2337's Avatar
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    Crankcase Sealant Question

    I am helping my friend put together his engine. He seems to think that Hi temp RTV is good for crankcase sealant. I have my doubts as I think gas can eat RTV. Is he right? If not, what do you guys recommend?


  2. #2
    I for one only use either/or ,yamabond,or loctite 518.The 518 stays slightly pliable ,and wont harden until the air is removed from it.(until you bolt case halves)The yama bond is a grey ,tough as nails ,sealer especially for cases.I have used both with great success in over 500two stroke rebuilds ,I quit counting 8 yrs ago.BOth these are gas and oil resistant.I would never use plain old rtv.I know they use it on oil pans and rocker box covers,but why take a chance of a leak.or breakdown??spend a few dollars and buy the right stuff!!JMHO>Marvin

  3. #3
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    NO,NO,NO.....Not RTV. Wanta use what he said..^^^^^^^^^^

  4. #4
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    I read that yamabond is being discontinued, and they recommend using Three Bond sealant. Three Bond 1211 is highly recommended.

  5. #5
    rob2337's Avatar
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    Ok, I am probably going to pick up some three bond 1211. Is $18 for 3.5oz a decent price?

    Thanks!

  6. #6
    SPEED KILLS, BUT YOU GET THERE QUICKER Keddano's Avatar
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    About right,It doesn't take a whole lot to do the case.

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