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Tractor Talk Discussion Forum

Repairing a cracked cylinder head

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Earl rt

03-19-2006 11:15:46




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I just found out that my wifes van has a definite blown head gasket and since it is an aluminum head I am betting it also has a cracked head. I know it's a long shot and probably a money graber, but have any of you ever used any of this stuff you pour in your radiator to seal the head and been succesful?




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JDknut

03-20-2006 04:02:47




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 Re: Repairing a cracked cylinder head in reply to Earl rt, 03-19-2006 11:15:46  
Pepper will seal cooling system leaks for a get-home repair, but if the head is cracked, time to scrap that SOB and get a new one.



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RAB

03-19-2006 14:15:40




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 Re: Repairing a cracked cylinder head in reply to Earl rt, 03-19-2006 11:15:46  
They have used ally heads on all sorts of things for many years without problem - motor cycles for instance. Gaskets usually fail due to overheating, detonation or other reason, although sometimes through plain old age - corrosion of fire rings etc.
My main comment is if it has an overhead cam. If it has you are a little limited in skimming to straighten, if warped, as cam bearing will no longer be in line.
RAB

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Matt in WA

03-19-2006 11:56:13




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 Re: Repairing a cracked cylinder head in reply to Earl rt, 03-19-2006 11:15:46  
Earl,

Same thing happened to my 4 cylinder head, on my Nissan pick-up one year ago. Turns out after being pressure-tested and inspected, it was only warped. The machine shop was able to hot tank it, plane it, and re-use the valves. He commented that a lot of the aluminum heads warp with time because they can't take the sustained heat with the miles. I'm sure someone is saying buy American, but the price was right at the time, and I was in school. Still has 159,000 mi. and still going. Anyway, you might have your head inspected by a machine shop. It may or may not be cracked? Good Luck.

Matt

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