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Thread: Tubes in the block.

  1. #1
    Gnatsum
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    Tubes in the block.

    Just wondering if anyone knows what these tubes are for. It’s a 351 Windsor block. The tubes are in the center of the block and each side has one.
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  2. #2
    Club Supporter mavrrrick's Avatar
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    Tubes in the block.

    Frost plug??... Meh, what do I know!!!


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  3. #3
    Posting and liking.... Ponyryd's Avatar
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    I think he’s asking about the thin tubes inside the frost plug holes, which I’m not really sure, but I wouldn’t worry about.

  4. #4
    Admin ZR's Avatar
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    If I recall correctly (don't quote me on this one) something to do with the casting process.

  5. #5
    Gnatsum
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    Yes talking about the small tubes in behind the frost plug. I have been blowing frost plugs out and can’t quit figure it out so I am resorting to tapping the holes for screw in plugs. The problem is these small tubes are in the way of driving a tap through. They look like they might break off if I try and bend them out of the way. I have never seen these in a sbf before. Any help appreciated.

  6. #6
    Club Supporter mavrrrick's Avatar
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    Ah... now I see them... looking at it on my phone and eyes are tired (old).


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  7. #7
    Admin ZR's Avatar
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    Blowing frost plugs out?
    Did it start immediately after a rebuild / new plugs installed?
    Typically never happens if installed correctly.

  8. #8
    Admin ZR's Avatar
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    Is that some kind of sealant on the edges?

  9. #9
    Club Supporter mavrrrick's Avatar
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    ^^ looks like weather stripping glue?


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  10. #10
    Gnatsum
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    Yes it’s a new build. The plugs were put in by the machine shop. It looks like they used a sealant of some sort, not sure what it is though. Some of the the checks I have done are verified head gasket are in right, replaced rad cap, installed new electric pump, both rad hoses and gutted the thermostat. Pressure check turned out ok and it flows water through the system with no restrictions. also pressurized all cylinders at 110 psi with no leaks at all. At a loss on this one other than plugs are put in wrong or someone cleaned the holes out a lil too much?

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