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Slight leak in block
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Slight leak in block
I just bought a Farmall B and after running it for a little while I have noticed a slight water leak in the block. It looks like somebody tried to patch or weld it. Is there anything I can do to keep it from leaking……Or is the block toast and I was taken advantage of?
Thanks.
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- Team Cub
- Posts: 11870
- Joined: Tue May 25, 2004 8:02 pm
- Zip Code: 80501
- Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
- Circle of Safety: Y
- Location: CO, Longmont
Re: Slight leak in block
Can you clean off the paint and see what's underneath?
"We don't need to think more,
we need to think differently."
-Albert Einstein
we need to think differently."
-Albert Einstein
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- Team Cub
- Posts: 17291
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: Slight leak in block
Where on the block is the leak? I assume hidden behind the carburetor.
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Re: Slight leak in block
Yes the hairline crack is right at the carburetor. I cleaned it off and attached another picture. Thanks for your advice.
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- 10+ Years
- Posts: 2793
- Joined: Tue Jul 22, 2008 12:44 pm
- Zip Code: 48370
- Tractors Owned: 184
- Location: Oxford, MI
Re: Slight leak in block
Paint it with Drylok! No, it doesn't work that well in basements either.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Re: Slight leak in block
Thanks… I’ll try the drylock. It was my fault for not catching this before I bought it. I was hoping there was something I could do besides having to replace the whole engine. I guess the old saying is true about live and learn!
Thanks everyone for your assistance.
Thanks everyone for your assistance.
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- 10+ Years
- Posts: 2793
- Joined: Tue Jul 22, 2008 12:44 pm
- Zip Code: 48370
- Tractors Owned: 184
- Location: Oxford, MI
Re: Slight leak in block
Don't waste your time with paints.
Some people groove it and braze (or weld) the cast iron. I hear it takes a lot of heat to get the cast iron to accept a weld.
Some people groove it and braze (or weld) the cast iron. I hear it takes a lot of heat to get the cast iron to accept a weld.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
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- Team Cub
- Posts: 17291
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: Slight leak in block
I'd groove it a little, then fill the groove with a filled epoxy like JB Weld. You will have to drain the coolant so you can dry the crack. Otherwise it can be done with no preparation. Prep'ing and heating to braze or weld is a major effort.
If JB Weld doesn't work, you still have the braze option.
If JB Weld doesn't work, you still have the braze option.
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Re: Slight leak in block
Thanks. I can use a Dremel and run a small groove and then fill with JB Weld.
And like you said if that doesn’t work I’ll find somebody that can braze it for me. Thanks again everyone for your suggestions.
And like you said if that doesn’t work I’ll find somebody that can braze it for me. Thanks again everyone for your suggestions.
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- 10+ Years
- Posts: 5228
- Joined: Tue Jan 12, 2010 2:08 pm
- Zip Code: 12514
- Circle of Safety: Y
Re: Slight leak in block
V it out and weld it, modern welders can do that easy with the right person using it, drill a small hole at the ends of the crack to keep it from cracking more
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Re: Slight leak in block
As suggested I drained the block and let it dry out and then put JB Weld on the outside and stop leak in the system. I still have a slight bit of seepage from the crack and was wondering if I should drain it, flush, dry and put stop leak in again?
Thanks.
Thanks.
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- Team Cub
- Posts: 17291
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: Slight leak in block
IMHO, drain, flush, and dry are parts of the JB Weld patching. No point unless you are going to try again with the JB Weld. Have you run it enough to get it well warmed up? If not, try that. Maybe try it again. The stop leak really won't circulate to where it is needed without the coolant circulating.
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Re: Slight leak in block
I ran the tractors for 30 minutes and it still had a slight seepage. I’ll try the JB weld process again and do a stop leak process for a 2nd time.
Thanks.
Thanks.
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- Team Cub
- Posts: 17291
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: Slight leak in block
When you warm it up, cover the radiator with something like cardboard to help push the temperature up.
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- 10+ Years
- Posts: 518
- Joined: Fri Feb 07, 2003 12:36 pm
- Location: WV, Morgantown
Re: Slight leak in block
TractorRod, Which JB weld did you use if you used the kwick weld, It's not very good in my opinon, get the orginal JB weld & follow the instruction to the letter, And let it cure for 12-24 hours I fixed a leaky cub cyclinder head probably 18 years ago & still no leaks as of today. Dave F.
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