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Canadian Poncho Homepage -> Canadian Poncho -> Pre 1958 Canadian Pontiac Power Train Tech Forum -> How bad is this cracked block?
Post Info TOPIC: How bad is this cracked block?
DonnyMac


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How bad is this cracked block?
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Hey everyone,

I bought a 1948 Fleetleader, with the 239 C.I. six, and the engine had been seized and unstuck by the previous owner before I bought it.  The head was still off and yesterday I started cleaning up the valves and pistons, and then under all this crud I found a crack going from the valves and down the cylinder wall.  This was on the bad cylinder that was stuck and had all the rust.  The rest of the engine inside looks really good though

 

Just wondering, is it worth fixing? Would StopLeak fix it?

 

Also this engine is painted black, and all the other ones I've seen online are a blue-green colour. Is this a Canadian colour? Or would it have been repainted?

 

Thanks for your help!



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seventy2plus2


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I'd say it's shot.

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cranks38


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seventy2plus2 wrote:

I'd say it's shot.

 So would I. A cracked cylinder can be repaired with a sleeve, but since the crack goes across the deck to the valve, the block is trash. 

. 



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4SPEED427


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I would agree with that. A crack that goes to the outside of the block from freezing can sometimes be repaired, the cylinder crack can be repaired but as stated once it carries away from the cylinder it's time to find a different block.

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DonnyMac


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Ah I see. That's what I figured but wasn't totally sure. I guess I'm on the hunt for another engine.


Thanks for the input!

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