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Unread 12-25-2011, 12:41 PM   #1
beefcake3
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Honing cylinder help

these are groves worn in the top of my cylinders can i hone theses out or will i need to have them bored out???
the other cylinders have the similar story. I dont have any measurement tools so i cannot say how deep they are they can be felt slightly with your finger

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Unread 12-25-2011, 12:57 PM   #2
222Doc
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hard to tell with a pic, but honing is basically just polishing metal, looks like that needs to be bored if you can feel it and it looks like not just a top ridge. did you get the pistons out with out reaming it, break any rings? you rebuilding the bottom as well? hard to say with out checking details miking it in a few places.
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Unread 12-25-2011, 12:58 PM   #3
ninjakid
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Know anyone with a ridge reamer?
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Unread 12-25-2011, 01:09 PM   #4
beefcake3
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Originally Posted by ninjakid View Post
Know anyone with a ridge reamer?
sadly i do not
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Unread 12-25-2011, 01:33 PM   #5
JPi1
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If you can feel it with your fingernail, it needs a bore. Since the ignition of the fuel happens at the top of the stroke, the condition of the upper bore is critical to power.
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Unread 12-25-2011, 02:24 PM   #6
beefcake3
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Is it possible that I could hone it enough for the jeep to run untill I can find a new engine for it??
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Unread 12-25-2011, 02:34 PM   #7
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Originally Posted by beefcake3 View Post
Is it possible that I could hone it enough for the jeep to run untill I can find a new engine for it??
May as well not bother - honing won't remove enough material to make a useful difference, if you can feel the ridges with your fingernail. You've got it torn down - I'd say to just strip the block and take it in.
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Unread 12-25-2011, 02:40 PM   #8
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Probably should be bored. If that is really out of the question, you could hone them as smooth as possible and put it back together with fresh rings. It will probably run ok for a while but won't really last.
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Unread 12-25-2011, 05:55 PM   #9
beefcake3
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Anyone eles have this problem??
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Unread 12-25-2011, 09:10 PM   #10
Alabamaranger
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Get a micrometer and measure the bore and see what the size is under the ridge. That will tell you if it needs to be bored or not.
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Unread 12-25-2011, 09:42 PM   #11
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Originally Posted by Alabamaranger View Post
Get a micrometer and measure the bore and see what the size is under the ridge. That will tell you if it needs to be bored or not.
If you can feel it, you're going to have to bore it.

You can strip out a ridge about .001-.002" (one side) height with 120-gr honing stones (I've done it a few times,) but it's hard to feel something like that unless you're got practise.

Typically, if you can feel it with your fingernail, you're looking at .003"-.005" on one side (total .006"-.010" defect,) and probably a bit more than that.

Typical overbores? You can find rings & pistons (yes, you'll need both to do a proper job) in +0.030" easily, with +0.010" being uncommon (but sometimes available, depending on application.)

Hone & re-ring? Perhaps - but I wouldn't count on it lasting more than it would take to source another block or pile up nickels to do the job right (call it six months at the outside...)
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