Wheelhorse#1 1,666 #1 Posted February 18, 2023 (edited) Well I was taking apart this 301 when I noticed this. No metal at all in there so it’s safe to say it was rebuilt at some point. It ran good on the bench.My question is it still worth using and running ,any harm in that ? It’s below where the piston travels . The piston wasn’t damaged Edited February 18, 2023 by Wheelhorse#1 Share this post Link to post Share on other sites
pacer 3,173 #2 Posted February 18, 2023 Should be fine, a fairly common thing. Hone the cylinder and throw some new rings on and put er to work....... 2 Share this post Link to post Share on other sites
Wheelhorse#1 1,666 #3 Posted February 18, 2023 32 minutes ago, pacer said: Should be fine, a fairly common thing. Hone the cylinder and throw some new rings on and put er to work....... Yes Sir..In the process of doing just that ! @pacer fairly common ? Any idea of the cause ? Share this post Link to post Share on other sites
pacer 3,173 #4 Posted February 18, 2023 3 minutes ago, Wheelhorse#1 said: Yes Sir..In the process of doing just that ! @pacer fairly common ? Any idea of the cause ? That happens when a rod breaks - with the engine turning several hundred rpm's the broken piece hanging off the end of the piston slams into the side wall and ....... 2 Share this post Link to post Share on other sites
Wheelhorse#1 1,666 #5 Posted February 18, 2023 5 minutes ago, pacer said: That happens when a rod breaks - with the engine turning several hundred rpm's the broken piece hanging off the end of the piston slams into the side wall and ....... Ahh Haa I see Share this post Link to post Share on other sites
RED-Z06 2,221 #6 Posted February 19, 2023 I try to grind the edge to not only give it some chamfer, but to also remove stress risers that could possibly form cracks...but it should still run fine, careful honing, if a 3 Stone hone grabs that its done 2 Share this post Link to post Share on other sites
richmondred01 2,237 #7 Posted February 19, 2023 (edited) I’ve been rebuild these old engines for decades. If you want to do it correctly then sleeve the cylinder. Anything else is a half smacked job. I sleeve about two per month. It’s not a big deal. Edited February 19, 2023 by richmondred01 3 Share this post Link to post Share on other sites
Jeff R. 35 #8 Posted February 19, 2023 This very thing happened to a C120 that I owned with a K301 when a rod broke back in 1992. I honed the cylinder, new piston, rod, and rings. It was still running fine when my uncle sold it back in 2020 - almost 30 years later. But I do agree with Richmond Red, it was not the proper way to repair the engine. 1 Share this post Link to post Share on other sites
Wheelhorse#1 1,666 #9 Posted February 19, 2023 (edited) 15 hours ago, RED-Z06 said: I try to grind the edge to not only give it some chamfer, but to also remove stress risers that could possibly form cracks...but it should still run fine, careful honing, if a 3 Stone hone grabs that its done Thanks for the advice .I ran a fine file over the area a few passes to clean up the edge a bit Id love to do a total proper rebuild on it but just don't have the funds right now.Other than the damage here the engine is really in pretty good shape and complete.Early 60s 301 with no balance gears. When I pulled the bowl off the carb it was full of clean oil.So I felt like at least someone thought it was worth saving before putting into storage. Rings, piston ,points ,gaskets exhaust valve, fuel pump,carb rebuild kits. .The parts cost me more than what I paid for the engine. I think got lucky one this one Edited February 19, 2023 by Wheelhorse#1 Share this post Link to post Share on other sites
