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By robles - 11 Years Ago
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Bored my 292 to 60 over and blew a pin hole in a cylinder on the first test run. I assume major corrosion in water passage. My engine has been a boat motor since 1987. Sleeving will fix cylinders but will I have other problems? Do you think I should find anther block? (already looing)
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By NoShortcuts - 11 Years Ago
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I'd take the engine apart, pull the soft plugs and take a hard look at the backside of the cylinders visible through the soft plug holes. Obviously, you can't see everything, BUT you should get a good sense of how corroded the water jacket is.
IF the water jacket does not appear to be significantly pitted, I'd take the hole in one cylinder as an anomaly and have the one cylinder sleeved and re-bored.
While core-shift in castings is what is most often talked about when over-boring engine blocks, flaws in metal castings are always possible as well. |
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By 56_Fairlane - 11 Years Ago
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I wonder what sleeving a block vs finding another that would need a bore of .030 or less would cost? I'm sure there are plenty of 292's out there. OTH if this were a 312 then I think there would be no question about sleeving it.
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By charliemccraney - 11 Years Ago
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Sleeving is expensive. If it is just for the one cylinder, then it will be worthwhile but if you're talking about the entire block, then a different block will be the best decision.
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By NoShortcuts - 11 Years Ago
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In addition to looking at the visual condition of the water jacket, SOME auto machine shops are able to pressure test blocks today.
Having this done could serve to give additional assurance that you're not going to run into additional problems.
The cost of having another block machined to the degree that your current one likely has been, is something I would seek to avoid.
Consider letting us know how this repair unfolds for you. |
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By Y block Billy - 11 Years Ago
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Sonic testing the cylinders would be a good idea!
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By PF Arcand - 11 Years Ago
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Another question that occurs to me, since this is a boat engine, was it regularly used in salt water ?
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By speedpro56 - 11 Years Ago
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Sleeved a 312 and it didn't hold very long, so I'm transferring everything into another block for insurance, I like taking mine on long trips without worry. My advice is to get another block and not have to worry if it will give up at some point at the wrong time. This is not the first one I seen let go, I tried and it didn't work.
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By NoShortcuts - 11 Years Ago
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Frank Rice writes in the Classified section where 'robles' is advertising for a replacement block...
pegleg (7/10/2014)
You might want to go ahead and sleeve this one. That is what is called an "inclusion". It's a piece of something else trapped in the metal when it was poured 50 odd years ago. Very likely the only one you'll find. It was partially uncovered by the tool when it was bored. Looks as though there's plenty of cylinder wall thickness left. |