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Deglaze or not?

Discussion in 'The Garage' started by Fubeca, Jan 13, 2004.

  1. Fubeca

    Fubeca 1/2 ton status

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  2. HarryH3

    HarryH3 1 ton status Author

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    An article in Car Craft last year said that some piston ring manufacturers now recommend the same thing. /forums/images/graemlins/shocked.gif
     
  3. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I don't believe that crap. Rings would never seat in a smooth cylinder wall.
     
  4. 75-K5

    75-K5 3/4 ton status

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    Well, it sure makes sense in theory, but I agree that it seems like there would be no way of getting the rings to seat. One way or the other, TTT for more discussion.
     
  5. 75-K5

    75-K5 3/4 ton status

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    OK, I just read this in another post...quoted from a respectable NHRA engine builder:

    [ QUOTE ]
    There is a myth among racers that you cannot break in an engine with synthetic oil. At our shop, we start and break in a new engine using the same synthetic oil that we use at the racetrack. Modern piston rings are lapped during the manufacturing process with crowned faces, and honing techniques have improved dramatically over the years. Thanks to these advances, the mating of the ring face to the cylinder wall is no longer an issue, regardless of the type of oil that is used.



    [/ QUOTE ]

    Now, notice where he says honing techniques have improved dramatically over the years. Made me think: that article was written based on info the guy got in a class in 1969. So that may have been good and well in 1969 when they had comparably junky honing tools, but is probably not so much of an issue today. /forums/images/graemlins/thinking.gif
     
  6. POWERMAD

    POWERMAD 1/2 ton status

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    I am not an enginer.
    But from the little moments I had to read that..
    Here is my take on it.
    They are talking about a budget rebuild.?
    So taking the cylinder ridge out is is unnessesary?
    Lapping valves is a waste of time ?
    And honing the cylinders is stupid?
    damn they way he makes it sound it looks like I ream em out with a rattail file.
    Does not leave a glaze???????
    When I get a plant back from a rebore I just check tolerances.
    On a plant that is just gonna have new rings put in..
    cut the ridge out. If ya want to know why I will peck it out.
    Follow the ring manufactures recomendation on honing and slide the slugs in.
    Fire it off and motor on.
    If piston slap and excessive ring gap is a worry then have the block bored.
    because if just running a hone down it makes ya nervous then have it punched out.
    And 20 wt to wash the cylinders????????????/
    Damn that must have been written in the 60's.
    I use ATF.
    After a brake clean wash.
    Not that a mirror finish is not the way to go.
    If in doubt read the instructions.
     
  7. TopOff

    TopOff 1/2 ton status

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    That appears to be about Bikes.

    I would not hone it if the bore checks out top to bottom. Which is basically what the article is talking about.

    If it IS bored, then you do NEED to hone. Again this article specifies this.

    If all your doing is a re-ring, and your bore checks out... don't hone. How many times have you found a car engine that needs a re-ring but not a bore?
    I don't think I have ever found a car engine that only needed a re-ring when the bore checks out.
    I can see this with a motorcycle engine though...
     
  8. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I've taken 20+ year old Chevy V8s apart and found the cylinders within spec. I still re-honed the cylinders before I put new rings in them, as I wanted some that would seat.

    I didn't take off a whole lot of material when honing, but I took off some.
     
  9. TopOff

    TopOff 1/2 ton status

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    wow. Interesting that you have found the bores to checks ok.

    I would still rely on my machinist opinion on what needs to be done.
     

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