New year, new engine

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jsfarmall
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Tractors Owned: 1948 Cub "Trusty"
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1943 Farmall H
1953 Farmall Super M (granddad's tractor)

New year, new engine

Postby jsfarmall » Thu Dec 28, 2017 9:52 pm

Rebuilding a 48 engine. Getting it bored .020. so new pistons and rings are obvious. Changing the crank, and new bearings are obvious as well. Should I go with new rods while I'm at it?
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

Larry in WNY
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Re: New year, new engine

Postby Larry in WNY » Thu Dec 28, 2017 10:05 pm

If the Rods are not damaged they don't need to be replaced, just the bearings. New pins and bushings may be needed. Install the rods in the same piston and pay attention to the numbers on the bearing caps. The Blue Ribbon Service manual has all the details described. Available from links on this site.
Larry

jsfarmall
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Posts: 568
Joined: Sat Oct 22, 2016 1:04 pm
Zip Code: 72454
Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: New year, new engine

Postby jsfarmall » Sat Dec 30, 2017 12:12 pm

I was just wondering cause before I bought the tractor the #1 rod broke. They replaced the rod but never fired the engine. Turned out the crank was bent then one thing and another which leads me to total rebuild. So just wasn't sure if it would be safe to get new rods or just not worth it. I can't find any where with new rods, only salvaged.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

inairam
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Zip Code: 19342
Tractors Owned: 1948 with international 1000 loader 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1975 with homemade mower 12 v - Horse
1979 long strip 12 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: New year, new engine

Postby inairam » Sat Dec 30, 2017 12:17 pm

If you are going for a professional rebuild I would let them inspect and purchase needed parts. If the crank is bent there could be other damage that only a engine builder would find.
When you only have 9 horsepower you need to know the names of all of the ponies!

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John *.?-!.* cub owner
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Re: New year, new engine

Postby John *.?-!.* cub owner » Sat Dec 30, 2017 3:14 pm

inairam wrote:If you are going for a professional rebuild I would let them inspect and purchase needed parts. If the crank is bent there could be other damage that only a engine builder would find.
:Dito: That is also where I have found I get the best price on parts. I also let them reassemble mine, they have much more experience than I have.
If you are not part of the solution,
you are part of the problem!!!

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areger23
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Tractors Owned: 1949 farmall cub
1950 farmall cub
1973 cub cadet 149
1961 cub cadet original
1951 david bradley super power
and a ton of other small engines

Re: New year, new engine

Postby areger23 » Sun Dec 31, 2017 6:00 pm

the number one question is why did #1 rod break in the first place, was it a crack from years of use, did they over speed the engine, or did it loose oil pressure and spun the #1 rod bearing. its a hard call, personally i would have a machine shop inspect the rods, line bore the main bearings, and check the block for cracks

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Shane Nelson
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Re: New year, new engine

Postby Shane Nelson » Mon Jan 01, 2018 8:30 am

John *.?-!.* cub owner wrote:
inairam wrote:If you are going for a professional rebuild I would let them inspect and purchase needed parts. If the crank is bent there could be other damage that only a engine builder would find.
:Dito: That is also where I have found I get the best price on parts. I also let them reassemble mine, they have much more experience than I have.

That also helps if something isn’t right, they have to eat that replacement cost, not you. Nothing worse than having to go back in when you think something is right.
Every home is a school, what are you teaching?
Circle of Safety

jsfarmall
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Posts: 568
Joined: Sat Oct 22, 2016 1:04 pm
Zip Code: 72454
Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: New year, new engine

Postby jsfarmall » Wed Jan 03, 2018 9:34 am

Nowhere around here will put an engine together with machine work for 1k or more. As far as the rod breaking I don't know why it broke other than a guess that the bearing failed of some sort cause the way the journal looked. If I would have been told why I wouldn't believe it anyway after what I have seen with this engine. I also cant find new rods anywhere. So I'll just have mine checked and new bushings put in. Piston kit I'm gonna buy comes with new pins
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M

CharlieK
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Re: New year, new engine

Postby CharlieK » Wed Jan 03, 2018 3:37 pm

around here in kentucky it is more than twice that
get er done; life is good


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