Question about cylinder head on first gen toolcat with Kubota V2203

   / Question about cylinder head on first gen toolcat with Kubota V2203
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#11  
when you have the head off look real close between the valve seats for a crack, the 843 we rebuilt looked fine but it had a real fine crack between the valve seats

we assembled it two times without success, finally had it magnafluxed and this found the crack, I assumed this was the cause of freezing and no antifreeze, this was a unit that ran good for half hour then blew smoke and bubbles in coolant.
Again, I took the head to shop before reassembly. They checked it for cracks and didn't find anything.
 

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