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Thread: Sbc 350 vortec heads coolant out of cylinder 6 exhaust.
          
   
   

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  1. #31
    36 sedan's Avatar
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    You still need to determine what caused the skirt to break, they don't normally break on their own.
    JMHO, but I suspect too much taper wear at the bottom of the cylinders.

  2. #32
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    Take a look
    Attached Images

  3. #33
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    JMHO, looks like ring blow-by and uneven skirt wear. I would check the ring lands for wear and cylinders for taper.
    Again just my opinion, but it's probably time for boring and new pistons.

  4. #34
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    Were the cylinders measured for wear / taper before the "rebuild"?
    Or did you just hone and set in new rings?

  5. #35
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    350 short blocks are cheap. scrap it and start over .
    NTFDAY and cffisher like this.

  6. #36
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    Skirt tabs on cast pistons are very easily cracked/broken just handling the pistons while on the rods-the flip side to side against shank of rod will very easily crack and/or break off the amount of the tabb that you see in these pics-----while there are only a few pics in this thread, I see several no-no's but have received no comment back from poster

  7. #37
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    Quote Originally Posted by 34_40 View Post
    Were the cylinders measured for wear / taper before the "rebuild"?
    Or did you just hone and set in new rings?
    I honed and set new rings.

  8. #38
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    Quote Originally Posted by jerry clayton View Post
    Skirt tabs on cast pistons are very easily cracked/broken just handling the pistons while on the rods-the flip side to side against shank of rod will very easily crack and/or break off the amount of the tabb that you see in these pics-----while there are only a few pics in this thread, I see several no-no's but have received no comment back from poster
    What's the purpose of that tab? I have another set of pistons doesnt have them
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  9. #39
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    That's was an excellent article!

  10. #40
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    Quote Originally Posted by DennyW View Post
    (Indian head)
    This gets hard. Not good for that use.

    Instead, use this on the threads. Works WAY better. And, it stays flexible.

    High-Temp Red RTV Silicone Gasket Maker 81160

    Attachment 70395

    You had good experiences with the rtv?

  11. #41
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    still have a cylinder full of coolant. busted skirt wont do that .
    cffisher likes this.

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