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Farmall & IHC Tractors Discussion Forum
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Why do we have to adjust valve after rebuild?

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Charlie

11-09-2003 14:40:48




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Seems as if you take the head off and put it right back why are the valves off. I adjusted
number one at TDC and the nut set screw sits deeper in the nut then before. What changed?




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John In Iowa

11-10-2003 09:25:02




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 Re: Why do we have to adjust valve after rebuild? in reply to Charlie, 11-09-2003 14:40:48  
When doing a Rebuild, you clean the block and maybe have the head redone. I always make sure the head is square and have the shop plane it some just to make sure. When doing all of these things, the odds are so great the valves will not have the same clearness. Even just replacing the head gasket, it won’t happen. Also after a rebuild you want to run the engine and warm it up good. Then cool and retorque the head. Again when you do this, you change the valve clearness and have to recheck the valves. Not doing this can cause a big headache down the road. Burning valves and even cracking the head.

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rustyfarmall

11-09-2003 15:24:37




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 Re: Why do we have to adjust valve after rebuild? in reply to Charlie, 11-09-2003 14:40:48  
The new head gasket is always either thicker, or thinner, than the old one you took out, which will alter the distance from the valve lifters to the rockers.



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Charlie

11-09-2003 14:52:49




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 Re: Why do we have to adjust valve after rebuild? in reply to Charlie, 11-09-2003 14:40:48  
Yes with adhesive



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Rich Cota

11-09-2003 14:54:45




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 Re: Re: Why do we have to adjust valve after rebui in reply to Charlie, 11-09-2003 14:52:49  
It will be different(the valve adjustment) everytime you put in a new head gasket.



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Rich Cota

11-09-2003 14:49:03




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 Re: Why do we have to adjust valve after rebuild? in reply to Charlie, 11-09-2003 14:40:48  
Did you put in a new head gasket?



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