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  1. #1

    Knurling valve guides

    I got a used 07 cylinder head to update to the newer exhaust valves, Im in the process of getting the head cheaned up and a new valve job and my machinist wants to knurl the valves guides as some of them are worn. Is this a bad idea based on how high performance these engines are instead of replacing them with new ones? I know knurling will work with an old chevy 350 but these engines are a wee bit different haha.

    Let me know what you guys think about this.

    Thanks


  2. #2
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    i used to work at a cylinder head machine shop and we pretty much knurled the guides for people to cheap to fix it the right way.... if that means anything hahaha knurling is not really a solution to a crappy valve guide just a patch

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    2017 RXT-X 300 zone 5's Avatar
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    replace them. As was already stated, its an old school way to save a little money.

  4. #4
    Can to guys tell me if they come from seadoo the proper size or are they gonna have to be reamed out?

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    Got Boost? psycho rxp's Avatar
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    Quote Originally Posted by stickshift69 View Post
    Can to guys tell me if they come from seadoo the proper size or are they gonna have to be reamed out?
    They come smaller, and must be reamed
    To the proper size. Good luck finding a shop
    That has the proper tooling. I went through
    About 4 shops before I found one capable of doing
    It properly.

  6. #6
    I have been dealing with my local guy for years, he is more into Harleys and small engine stuff. He told me that he ordered in a knurler and a reamer to do the guides for me... Thats when the bulb popped in my head about knurling the guides might not be in my best interest!

  7. #7
    Got Boost? psycho rxp's Avatar
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    The problem is that the material is so hard, that it eats up normal tool steel reamers. Hope he got the seadoo reamer, or better.

  8. #8
    Ill have to mention that to him, hope he did tho. Is there a seadoo part number for that, maybe ill get one? What about the SBT valve guides they have, they are a whole bunch cheaper then the oem ones?

  9. #9
    Got Boost? psycho rxp's Avatar
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    They Are just as good, and look identical to OEM.. IMO, I still have a few left for spares. I finally found a shop that could install, and properly ream them for these heads, locally. Not sure on the part #.

    PPG may know tho..

  10. #10
    Thanks psycho rxp, thats great to hear it will save me some big $ compared to oem ones. Any other opinions on these guides? Anyone know the part number for the seadoo guide reamer?

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