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Help!Cracked block

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dantanner

12-19-2005 15:09:50

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Hi.Has any one discovered a 100% way of fixing a leak in an engine block.I have a massey 135 the leak is up above the fuel pump on the outside of the water jacket.Which is best stick welding,brazing,plastic metal.I'm hoping to fix it with it still on the tractor.Any advice would be welcome especially from someone who has repaired several with success.

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Christos

12-20-2005 07:32:58

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

Hi - I just went through something simular with my tractor - If I were you can could afford it, I would get a new-for-you block. My MF 135's block had been welded back in the early 1990s and it caused the cylinders not to seat correctly.

Needless to say, and by making a long story short, I had the Z145 block, it cost me $650.00. I had to buy a new block because some ding-bat back when my dad was alive and dealing with that machine, welded the block to the point that the cylinder sleeves wouldn't seat, thus relegating it into yard ornament status for 12 years until I started pumping money into it.

Bottom line...$650 is WAY cheaper than the total cost of fixing my tractor from sitting for 12 years - around $5,3k.

Oh on the plus side - if you have a perkins engine gas or diesel, the parts are reletively cheap and common!

Christos

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Christos

12-20-2005 07:31:52

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

Bottom line...$650 is WAY cheaper than the total cost of fixing my tractor from sitting for 12 years - around $5,3k.

Oh on the plus side - if you have a perkins engine gas or diesel, the parts are reletively cheap and common!

Christos

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Mike M

12-20-2005 04:24:23

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

You asked for a 100% fix so here it is. Get another block that isn't cracked. Once a crack always a crack,anything less is just a patch that may or may not hold. Good Luck on whatever you try.

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Just Curious

12-20-2005 00:47:25

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Let the Pro's handle it in reply to dantanner, 12-19-2005 15:09:50

this web site has some very good informaton

http://www.locknstitch.com/

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RAB

12-19-2005 22:45:33

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

JB weld or cast weld - but not braze.
If brazed and fails, cannot then be welded easily with any trace of braze on/in the metal.
Regards, RAB

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J I Case

12-19-2005 17:56:02

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

that web sit is Cuts-like-plasma.com
Sorry for the wrong post

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J I Case

12-19-2005 17:54:08

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

I have welded several cast parts since buying a new kind of oxygen-acetlin tourch head call a Henrod. Check out the sit and see for yourself it is www.cutslikeplasma.com It has worked well for me but it is difficult and it does require the knowledge of how to slow cool a piece of cast.
Best let a pro do it unless you are a pro yourself.

Best Regards
J I CASE

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Dale in Ar.

12-19-2005 17:42:36

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

you can have the block brazed IF the person knows how to do it right.Cast needs to be cooled down real slow to prevent futher cracking.I had a block ruined because the person didn't cool it down slow,put about pound of bronze on it.The block kept cracking as it cooled.Best thing you can do by yourself is,grind the crack,drill holes at the ends of the crack and use J.B. weld unless you have pressure on the system.Then your best bet would be to find a welder or machine shop who uses the slow cool down method.

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Short Bolt

12-19-2005 16:01:55

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

Dan: About 25 years ago we had a Allis WC. That froze up and cracked the block external. You could stick a razor blade in the crack. My Dad cleaned the block, washes the crack out with
either,Heated the block with atorch, pushed
"powder lead" in to the crack,heated the block again with the torch. Filled up the radiator
with water. Left the cap off, put a tarp over the radiator started the tractor, warm her up good, poured WATER GLASS in real slow and let her get near hot! Pulled the tarp and let her set and run for about 1/2 hour. Let it cool down some, drain down the water put antifreeze in. No leak, No crack,. The next summer we sanded it down painted the tractor and used it for many
years. Hope this helps.

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Sloroll

12-19-2005 15:41:01

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

I am sure you will get much better advice but if the crack isn't wide but is a hair line fissure, you can minutely grind into the cast just a bit along the break. Stop drill each end and tap for a small bolt. Drill and tap for a small bolt every 2 inches or so. Grind off the bolt heads then fill the crack gind with JB weld. This is assuming a water jacket freeze type of crack and not a fatigue break requireing a lot of strength. If left alone this repair will last and be virtually invisible. Again, it has to be in a non stressed area.

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Dave Sherburne,NY

12-19-2005 15:47:31

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Re: Help!Cracked block in reply to Sloroll, 12-19-2005 15:41:01

This is what I was told to do to a farmall A
block with a chunk of the block loose behind the carb. Its still going strong. Just make sure you
clean it real good.

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Sloroll

12-19-2005 15:58:01

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Re: Help!Cracked block in reply to Dave Sherburne,NY, 12-19-2005 15:47:31

I have seen it done before and a wise fellow I purchased a tractor from told me how to do it. I have been told too if you press some sandpaper over the JB weld before it completely sets up it will really blend into the cast.

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IaGary

12-19-2005 15:20:47

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

I brazed a external leak on a early 1980's JD block once. It held for a couple of years then the owner sold it. So I don't know if it is still in service or not. There are companys that do nothing but repair blocks and heads. There is one in Neveda Iowa. They repaired our 966 block after the rod went out the side and left a 3" hole. It work fine for 4 yrs. before we traded it.

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Allan in NE

12-19-2005 15:15:44

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 15:09:50

Dan,

Find someone who is an artist with a torch.

I've seen lots of 'em repaired by brazin' but that darned cast really requires someone who knows what he is doing.

Allan

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IaGary

12-19-2005 15:26:54

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Re: Help!Cracked block in reply to Allan in NE, 12-19-2005 15:15:44

There are two ways to weld cast. Ther is the hot method and also a cold method. On a big object I prefer the cold method. You just do a little at a time and don't get it very hot. With the hot Method you need a oven to heat it, then weld, then bring the temp. down slowly.

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dantanner

12-19-2005 16:00:31

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Re: Help!Cracked block in reply to IaGary, 12-19-2005 15:26:54

Have you actually done this cold weld yourself?

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IaGary

12-19-2005 16:28:39

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Re: Help!Cracked block in reply to dantanner, 12-19-2005 16:00:31

Yes I have many times but mostly on cast dies that were used to stamp out sheet metal auto parts. Some cast can be welded others has to be brazed depending on type of cast. If you take a grinder to the metal and the sparks are orange you have to braze it if they are yellow like steel then you can weld with a wire welder but you have to stress releive it as you go by peening it. I don't know if I can explane it all here. It took me a 3 hr class to learn the method when welding. Brazing would be simpler for most. Like Schroll said with JB weld you should drill two holes at the end of crack before brazing also then braze over the screws.

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37 chief

12-19-2005 19:18:40

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Re: Help!Cracked block in reply to IaGary, 12-19-2005 16:28:39

I repaired a 3 in hole in my MF 231 block, by using the cold weld method. The rod is fairly expensive. It worked all this year. I bought the tractor with the hole in the block. Just don't get in a hurry. Stan

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