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  1. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    The slow cut valves are notorious for leaking. Many drill and tap closed and go w/o. Their are plenty of threads describing how. Green circle is a casting mark. Back sorry, I half read, distracted by a bare Chevy block and it’s talking owner. The block “could” be on the wrong way. They do have a...
  2. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    I love the H.A.M.B site. Technical - Ignition timing with a vacuum gauge
  3. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    Its SOOOOO clean too! Sexy. Glad to hear it went so well and thus far.
  4. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    Ok so my feeling is this... any sealer that potentially becomes goopy chunks during manipulation of the horns into the manifold can/could be sucked where you don’t want it. Personally I wouldn’t do it.
  5. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    Mine is attached to the truck now and I’m having a hard time recalling the way they look when installed. is there two shoulders or landings, (whatever they’d be called)? One for the bendy one and one for solid? If you put sealer you’d need to not add it to those gaps only to the solid ends. And...
  6. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    I thought that there was supposed to be some allowance for those rings to move inside the horns. Adding sealer will affect any movement. Are your horns out of round? I suppose that could be a reason to use sealer...
  7. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    No sealer. Are you using new rings?
  8. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    :clap::clap: Way to go!
  9. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    @gregnash, loaned his tap to me. Send him a message but appears you’ve got what you need now that I look back. Could you be finding built up sediment?
  10. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    Pretty sure I used oil to soften the old gasket material. I blocked all holes w/ rags and only did a few inches at a time before using a shop vac to grab the bits.
  11. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    And kudos to the cool neighbor. Sounds like you found yourself and extra set of hands for future tasks.
  12. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    Ask for the head to be magnafluxed and check flatness as stated above. And they won’t typically pressure test it as well but ask regardless if they have the equipment and can, it’s a pretty cool process. You can find videos on YouTube. Stem seals definetly. Guides not so much. Your valves all...
  13. NeverGiveUpYota

    Rough idle, compression test... head gasket at 3 and 4?

    3 & 4 are more common.... feel free to correct me but that’s where the cylinders meet at their most narrow point. It’s always said to listen for air/bubbling between 3 & 4 also.... AND if the head wasn’t checked for flatness it’s most often to be off in the middle as well which again is between...
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