Thread: Knurling valve guides
08-22-2010, 09:30 PM #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.
08-22-2010, 11:02 PM #2
- Join Date
- Aug 2009
- Discovery Bay, CA
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
08-22-2010, 11:19 PM #3
replace them. As was already stated, its an old school way to save a little money.
08-23-2010, 09:46 AM #4
Can to guys tell me if they come from seadoo the proper size or are they gonna have to be reamed out?
08-23-2010, 10:22 AM #5
08-23-2010, 12:33 PM #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!
08-23-2010, 05:04 PM #7
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.
08-23-2010, 05:20 PM #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?
08-23-2010, 06:07 PM #9
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..
08-23-2010, 10:20 PM #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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