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Post by oldsproject on Dec 31, 2012 17:48:15 GMT -5
How much will cause issues? Here's what I've got: Stock 65 425 A block that has reasonbly little wear (suprisingly). Mearsures out stock. Pistons, rods, wrist pins all excellent. Crank measures out to new specs, no wear indication at all. Started to hone the cylinders and of coarse, one (just one) has to have some pitting that probably won't hone completely out. I truly hate to bore and buy new pistons but it is what it is. A few pix below so let me know what you guys think: TYPICAL HONED CYLINDER  THE PITTED ONE   |
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Post by Deleted on Dec 31, 2012 19:03:32 GMT -5
Driver? Wouldn`t worry about it. I know your not done, I`d just go to your final grit (depending on ring preference), get your cross hatch, call it good. Those linear hone lines will cause you more grief than the pits. If you would have used a dingle-berry glaze breaker those pits would have been erased.. But you would have one crappy job. IMHO !
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Post by 1965f85 on Dec 31, 2012 19:20:30 GMT -5
I'd have a good hone done, and get yourself a good set of rings. I wouldn't worry too much, unless you're concerned about top performance.
Ted
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Post by oldsproject on Dec 31, 2012 19:20:58 GMT -5
Yeah, will cross hatch and clean it up once I like where I am on the final. Definately Driver. May actually finish off with the dingles. At least a couple quick drops in and out unless you guys think otherwise?
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Post by Deleted on Dec 31, 2012 19:34:32 GMT -5
Yeah, will cross hatch and clean it up once I like where I am on the final. Definately Driver. May actually finish off with the dingles. At least a couple quick drops in and out unless you guys think otherwise? There only good for straight cylinders, only as a quick glaze breaker, can do more damage than good. Now that you`ve got your cylinder softened up, just use your finish stone and speed up your stroke with lots of lube. |
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Post by bubbasz1 on Dec 31, 2012 19:37:17 GMT -5
I'm along with Ted and Mike, finish hone it and put it together, no problemo.  |
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Post by keener on Dec 31, 2012 22:07:09 GMT -5
I had similar pitting on the #8 cylinder for the '64 442. I honed it and slapped it back together. It does not smoke and if you get the proper rings I cannot see it being a problem. Agree with the rest of the gang.
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Post by Deleted on Jan 27, 2013 22:29:31 GMT -5
Those pits won't bother it at all. I have assembled engines with worse pitting than that and had no problems...
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Post by oldsproject on Jan 29, 2013 22:39:49 GMT -5
Thanks for everyones advice!!
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Post by Deleted on Jan 30, 2013 20:01:54 GMT -5
Do measure the final bore. And compare with desired. If you get to 0.020+ beyond the desired cylinder bore, you may end up with noticable piston slap, sounding like a diesel.
As stated by others, the rust areas are OK. Opening the bore too much with the hone will yield undesirable piston slap.
As an alternative, the 350 Olds pistons work well with a 0.057 overbore.
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