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Cracked block advice, 8N

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Andy Newell (WA

12-31-2002 21:51:17




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Hi all,

Been lurking a couple of weeks, time to jump in and ask for advice. I hope I'm not opening a sore thread, like dino vs. synthetic oil ;-)

Just got a call from the machine shop and they found the classic freeze crack in the 'water' side of the block.

It was so fine that the machine shop didn't find it until they were drying the block, this spot kept getting wet. I'm really angry at myself for not finding it before buying. I did look, but obviously the previous owner used some form of sealant as the engine never leaked when testing.

What is the list wisdom regarding this kind of problem? Junk it? weld it? block seal in a can?

I did look to the archives, but I couldn't get them to return any results.

Thanks, Andy Enumclaw, WA

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Al(TX)

01-01-2003 19:36:29




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 Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 21:51:17  
Andy,with the high nickle cast rods they have today it can be welded easy and won't give you any more problems,just get someone that can weld to weld it.



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Rob - also in Enumclaw

01-01-2003 09:47:05




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 Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 21:51:17  
I think you've got plenty of good direction on where to go with the crack. Just had to chime in when I saw you're also in Enumclaw. Whereabouts?

Rob



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Hal/WA

01-01-2003 00:37:53




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 Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 21:51:17  
If the crack is that fine, then why not just throw in some stop leak after you have it together if it leaks a little. Especially if you have already paid for machining. It will probably work fine. Several old rigs that I have worked on had freeze cracks that leaked and stop leak worked for me on all of them. I would only worry if a chunk fell out or if it continued to leak internally and contaminated the oil.

Prestone must have been real expensive way back when.

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kjm

01-01-2003 03:50:40




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 Re: Re: Cracked block advice, 8N in reply to Hal/WA, 01-01-2003 00:37:53  
Hal, I don`t know why,but Dad always drained the anti freeze out in the spring and saved it till fall and put it back in. Maybe he was afraid we would boil it over and loose all that green stuff.



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raytasch

01-01-2003 05:04:18




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 Re: Re: Re: Cracked block advice, 8N in reply to kjm, 01-01-2003 03:50:40  
Could this have possibly been alcohol that he drained and saved? Alcohol was widely used as an antifreeze years ago. It was common practice to drain it when the weather got warm as it would boil off at around 140 degrees.
ray



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Levi(WA)

12-31-2002 23:21:19




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 Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 21:51:17  
Andy,
Its a working tractor.
You can weld it and it will out last you, the 8N I'm parting has a welded block and has been going 25 years that way and would/will go another 25.
good luck, god bless and happy new year....Levi



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Bill Priday

12-31-2002 22:11:46




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 Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 21:51:17  
What are you going to use the tractor for? Show? Workhorse? Depends upon that and whether you had last week's winning lottery ticket. My block looks like someone broke it in half and a swarm of dirt-dobbers conspired to put it back together, sorta like that vase on the Brady Bunch. BUT it holds water. JB Weld will work for a small crack in the outside of the water jacket. Conventional wisdom goes that you should drill a hole in the end of the crack to keep it from running on. Do that, then grind out with a die grinder a little valley about half to 2/3 as deep as the block is thick at that point and then mix up your JB Weld and smear it in the crack. Make sure the crack--and beside it the width of a piece of duct tape--is ABSOLUTELY clean, no oil or water at all! JB will sag during the time it takes to cure, so I've always slapped a piece of duct tape over it, to hold it in place until it cures (NOW you see why the comment above! So the tape will stick!)

My two cents. May not be to your liking either in appearance or perceived serviceability--your call...

Bill Priday
South Texas
41 9N88110

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Andy Newell (WA)

12-31-2002 22:20:44




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 Re: Re: Cracked block advice, 8N in reply to Bill Priday, 12-31-2002 22:11:46  
Sorry, should have been more clear on the usage. Just a workhorse around the property, about 90% road maint. If it works I don't much care about the look.



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Bill Priday

12-31-2002 22:41:46




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 Re: Re: Re: Cracked block advice, 8N in reply to Andy Newell (WA), 12-31-2002 22:20:44  
Well, then, Andy, can't hurt to give it a shot. There's virtually no pressure on an N's water jacket since they were designed to run an unpressurized cooling system. Even with a 4 lb cap most of the ones I know of run with the cap loosened.

Mine's got a couple of seeps in the chewing gum some yayhoo called welding, so I'm going to grind it out and JB it in the next couple weeks.

Good luck, and happy new year!

Bill

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