rvbuilder1
Active Member
Lyc 0-290D Engine Evaluation
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I have a Lycoming 0-290D engine I purchased that had been rebuilt and fitted with an 0-320 crankshaft. The sump and rear assy housing were also repalced. The sump is an 0-320 and takes an MA4SPA carb vs the MA3 SPA used on all 0-290's. I plan to tear it down and check all dimensions and fit and reassy. When I pulled the cylinders I found some wear in the very top end of the cylinders where it apears the piston is rubbing. Nothing major just some rub markes on both the cylinder and the top of the piston. Question has anyone knowledge of the applicability of an 0-320 crank in an 0-290. I am guessing that the stroke is longer and causing the pition to travel farther than it should. Where can I get info on this. I am inclined to find an 0-290 crank and replace the 0-320 crank.
Any help here would be helpful.
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I have a Lycoming 0-290D engine I purchased that had been rebuilt and fitted with an 0-320 crankshaft. The sump and rear assy housing were also repalced. The sump is an 0-320 and takes an MA4SPA carb vs the MA3 SPA used on all 0-290's. I plan to tear it down and check all dimensions and fit and reassy. When I pulled the cylinders I found some wear in the very top end of the cylinders where it apears the piston is rubbing. Nothing major just some rub markes on both the cylinder and the top of the piston. Question has anyone knowledge of the applicability of an 0-320 crank in an 0-290. I am guessing that the stroke is longer and causing the pition to travel farther than it should. Where can I get info on this. I am inclined to find an 0-290 crank and replace the 0-320 crank.
Any help here would be helpful.