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Ford 9N, 2N & 8N Discussion Forum

CRACKED BLOCK

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ROBERT JOHNSTON

11-15-2005 11:51:51

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IS IT POSSIBLE TO REPAIR A CRACKED BLOCK ON 8N TRACTOR CRACK IS BY THE WATER JACKET.

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FarmerDawn

11-15-2005 16:49:31

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

Are all cracks in a block repairable? I am thinking of one inside a cylinder, in a picture in a Spencer Yost book I am reading. Would that type also be repairable?

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lumpy

11-15-2005 15:16:08

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

I repaired a farmall B block just like Dell said. It worked great. That was 10 years ago, hasn't leaked a drop of anti-freeze since.

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RustyAL

11-15-2005 14:50:31

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

Got a pile (4) of tractors with weld repaired blocks. Some of them look like frankenstien. One of them is said to be a complete rebuild and was running. Or at least said to be running.

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hvw

11-15-2005 14:32:12

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

The block on my 8N had cracked along the water jacket on top of the engine before I bought it 22 years ago. The crack was at least 6inches long. Someone had brazed the crack I guess with bronze rod and it has never leaked.

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Dell (WA)

11-15-2005 13:02:09

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

Robert..... ...typically, the water jacket cracks because someone forgot to use ANTI-FREEZE.

And while you can "arc-weld" castiron with nickle rod, you need to use an "oven" to gently cool yer weld in about 24hrs. NOT CHEAP. You can also use castiron rods with oxy-acetylene gas welding. Or you can also "braze" castiron with gas welding.

I recommend using a 2-part EPOXIE product like J&B Weld instead.

Drill 1/8" stop-crack holes in ends of crack. V-OUT the crack some with grinder. Cleaner good with brake-cleaner. Then using long-cure puckey (follow instructions), fill yer v'd-out crack. Next clamp some 100-grit sandpaper over yer puckey with a board. (cut to fit) This gives yer puckey a castiron texture that when painted over, is nearly inn-detectable. Let cure for at least 24hrs. Simple, eh..... ....Dell

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fnhtech

11-15-2005 13:00:56

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Re: CRACKED BLOCK in reply to ROBERT JOHNSTON, 11-15-2005 11:51:51

It's been quite a few years, but we used to repair alot of cracked blocks in our shop. With the method we used it really depended on precisely where the crack is as to whether we could repair it. We had sure done a bunch of 'em though with very good success.

Our method utilized brass screws and a bit of steel epoxy (may sound strange, but it works great in the proper application). We would drill and tap holes along the crack, installing the screws with a bit of the epoxy, and overlapping the screws as we went, cutting the heads off as well. A very simplified explanation of the process, for sure, but it works well.

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