So, I picked up a non running Cub, PO said engine stuck a couple of weeks ago.
Was able to turn the engine with a crank.
Got it home and was able to get it running in a few minutes, good oil pressure, but a horrible knock at the front of the block.
Pulled the oil pan, found interesting bits of ferrous materials. See pic.
Checked #1 connector rod nuts and one was finger loose.
Pulled the connector rod cap and this what I found. See pic 2.
So the bearing is really gone.
Question is, what now.
New bearing, turn crank, etc, etc.
Put in a different engine, which I already have.
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Runs but horrible knock.
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Runs but horrible knock.
1953 Cub, Sickle Mower, 42" Mower, Cultivators, 189 Double Plow, 54 Blade, Grader Blade
1968 Lo-Boy w/1000 Loader, 1957 Lo-Boy w/FH, FH Disc, FH Potato Plow.
1968 Lo-Boy w/1000 Loader, 1957 Lo-Boy w/FH, FH Disc, FH Potato Plow.
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Re: Runs but horrible knock.
Put in the different engine. Put the current engine on the bench or engine stand. Once disassembled, measured, and inspected, determine if the engine is worth rebuilding.Thackery wrote:Put in a different engine, which I already have.
I have an excuse. CRS.
- John *.?-!.* cub owner
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Re: Runs but horrible knock.
I would remove the engine and pull the crank to take to an automotive machine shop. Crank may or may not be too far gone to grind. If you do not have a puller to remove the crank pulley, take the front plate with crank, the machine shop will have the needed puller. Do NOT pull on the edges of the pulley, it must be gripped near the center. While this far along, may as well look into rings or boring and pistons, as well as valve job. It's only money.
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Re: Runs but horrible knock.
My first question would be is how good is the replacement engine. If it is in good running condition I would say replace it. If not, rebuilt it instead of the one in the tractor now. If the replacement engine you have is strong, the take the engine in the tractor out, and take your time rebuilding it, and you have a good engine when you decide to bring home another non running cub.
- LRiddle
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1951 Farmall Cub - Chesty
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Re: Runs but horrible knock.
I think I'd go with the back up. Then you can take your time to build a good solid motor as another spare.
Luke Riddle
Tallmadge, Ohio
1951 Cub - Chesty
Tallmadge, Ohio
1951 Cub - Chesty
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Re: Runs but horrible knock.
John *.?-!.* cub owner wrote:I would remove the engine and pull the crank to take to an automotive machine shop. Crank may or may not be too far gone to grind. If you do not have a puller to remove the crank pulley, take the front plate with crank, the machine shop will have the needed puller. Do NOT pull on the edges of the pulley, it must be gripped near the center. While this far along, may as well look into rings or boring and pistons, as well as valve job. It's only money.
What John said. Who knows what the replacement engine will be like. At least if you break it on down you will know what you are dealing with.
Al
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