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Old 07-22-2010, 11:36 PM   #1 (permalink)
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My rebuild of GIZMO this week took a bad turn. I purchased the 1988 Sami about 3 months ago and have been updating and replacing a big portion of parts for a while. Wifes in Europe so I backed it into the garage and removed the motor and took it the the machine shop. Everything is all painted up nice and clean in anticipation of getting the motor back monday. Got a call today and was told the block has a crack in the #2 cylinder. Can't use the block, but the head is ok. Their looking for another block. Just another expensive setback.



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Old 07-23-2010, 10:22 AM   #2 (permalink)
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I wonder what cracked the block? I rarely hear about the bottom end having issues.
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Old 07-23-2010, 11:26 AM   #3 (permalink)
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Its not unusual for the block to crack if its been overheated, usually it goes between #3 and #4.
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Old 07-23-2010, 01:58 PM   #4 (permalink)
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blocks crack in engines from uneven thermal expansion where there's poor coolant circulation and the different areas of the block don't heat evenly. Some engines like the new honda civics have casting defects or are poorly designed and the problem is common and inherant to a specific engine. That's not a problem with the samurai engine. Another cause is lack of antifreeze in a sub freezing condition and the block cracking from expanding frozen coolant or water while sitting overnight. I've heard of people cracking a block by putting cold water into an empty radiator when the engine is overheated. I know loss of coolant from an engine block crack can cause overheating, but overheating an engine typically doesn't crack the block. Could crack the head though from an overheat.
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Old 07-23-2010, 03:19 PM   #5 (permalink)
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Overheating causes coolant loss which leads to uneven heating and cracking, it is fairly common with newbies in Zuks in mud.
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Old 07-23-2010, 06:02 PM   #6 (permalink)
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I'd think that would be from dunking an overheated engine block into a cool mud bog.
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Old 07-23-2010, 08:28 PM   #7 (permalink)
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Talked to the shop today and no luck with a block yet. Will probably have to buy a block already built up which means more money. Small setback but I'm running out of time before hunting season.



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Old 07-23-2010, 09:21 PM   #8 (permalink)
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Can ypu post some pics man. I'm just curious with the cracks. lol
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Old 07-23-2010, 10:32 PM   #9 (permalink)
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I don't have the block right now. I will have it next week. I dought the shop will be able to find another block, so I will just go get all of it. I will try and take pictures to post.


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Old 07-24-2010, 12:13 PM   #10 (permalink)
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are you just looking for a block and swapping all the internals over? or are you looking at a short block with the pistons and crank and everything in it? There are plenty of places online to buy rebuilt engines from. A rebuilt short block should cost you between $600 and $800 depending on shipping and core charges etc.
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