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Cracked Block or Casting Mark?

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Ramrod

09-11-2004 11:18:29

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Pulled engine, got it up to eye level, and saw something that chilled me. Now y'all need to tell me that NAA blocks all have a casting mark on them just like mine, and not to worry.

more pics...

Link

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Ramrod

09-12-2004 04:26:58

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

OK boys, today is the day. I'm gonna drill the ends of the crack, grind it open with my Dremel tool a bit, and seal it up with JB Weld. Tomorrow it goes to Big Ed for magnaflux and decision time. If it's got more cracks, it may be short block time. I hate to spend that kinda money, but I'm way too far into this old warrior to give up on him now.

I'll post pics later,
Ramrod

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Larry 8N75381

09-11-2004 18:43:17

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

Ramrod,

That is a crack from the coolant freezing during the winter. Not a serious problem as you should know from the other posts. I had the block in my wife's 1963 Dodge Dart crack way back in the late 60's. I didn't know any better (that you are not susposed to "weld" on cast iron) - maybe still don't - so I got out my trusty oxy-acetlene torch and just brazed up the crack. Since it hapened to start in the "freeze plug", the hardest thing was cleaning pu the hole so I could put a new one in. Ran the car many years after that and never had it leak. From what I can tell it is still leak proof today - engine is out of car right now since someone put on the sheet metal cover for the lower bell housing and it sounded like a bearing had spun. I out a cheap replacement job done, which is still in the car. I kept the original engine just in case I wanted to put it back since it really was OK.

Do like the guys say, seal up the crack so it doesn't leak coolant and go on and work that NAA!

Regards,
Larry

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Bob - MI

09-11-2004 17:07:58

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

Not a casting flaw, this is a crack. Lots of ways to fix this. I would be looking at JB weld. One thing I do wonder about is if it"s growing. If so, drill a hole at the end of it to stop it from progressing. Thank your stars that it"s where it is and it"s not under any serious pressure.

If this is a freeze crack, there may be more.

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Tomtom

09-11-2004 16:41:41

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

The "freeze plugs" are not freeze plugs at all and are not meant to protect a block from freeze damage. They are used in the casting process.

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Rob

09-11-2004 13:24:50

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

60/40 solder it up, peen it in, and forget about it.

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Eric ATL

09-11-2004 13:13:27

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

I'm no motorhead but I do know a freeze plug when I see one. I find it ironic (and sad) that the crack occured just below a freeze plug. Aren't they there to prevent such things from happening? From many posts I've read I've been soaking up all the potential problems I may find IF MY N EVER GETS HERE! I've thought about the possability of a cracked block. I think if I find one I'll take it and have it fixed by a machine shop. Much less worry that way. If you're a lot more skilled than I am you can probably fix it yourself. Now, if they made engine blocks out of wood, I could fix it. Eric

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Cap-N-ID

09-11-2004 12:06:44

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Re: Cracked Block or Casting Mark? in reply to Ramrod, 09-11-2004 11:18:29

Ramrod -- Sorry, not a casting mark, it's a crack. Not really a big problem and there are a lot of posts in the archives with good suggestions on how to fix it so I won't go into that again. Don't worry about it -- just patch it using the method of your choice.
--Cap--

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