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Farmall & IHC Tractors Discussion Forum
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Super C Valve Clearance Cold

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JBlavl

09-01-2004 05:38:14




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I am rebuilding my 1953 Super C. In the process of putting it back together I noticed that all the valve clearances were different. So I looked in the book and it says .014 hot. Now I obviously can't get the tractor to run thus get it hot without starting out with some sort of initial clearance. What can I set it at cold to get me by till the engine is hot and I can reset them?




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Steve W (NY)

09-01-2004 05:52:13




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 Re: Super C Valve Clearance Cold in reply to JBlavl, 09-01-2004 05:38:14  
Here's what I reasoned and it seeme to work for my BN. If the push rods expand when hot, then the cold clearance should be more. I set mine to .017 cold. It's better to have them too loose than to tight. Too loose and at least they seat good....too tight, and the exhaust valves will burn. The head actually acts as a heat sink, every time the valve makes contact, heat is pulled to the head. I had mine up to operating temperature pretty quick, and retorqued the head, and readjusted the valves. It was pretty close.

Take Care Steve

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Red Dave

09-01-2004 06:22:50




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 Re: Super C Valve Clearance Cold in reply to Steve W (NY), 09-01-2004 05:52:13  
.017 cold has worked out pretty good for me on A's & B's too.



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JBlavl

09-01-2004 08:40:09




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 Re: Super C Valve Clearance Cold in reply to Red Dave, 09-01-2004 06:22:50  
Sounds wonderful. When setting the clearance on the valves should you put you feeler gauge in and then tighten the bolt until you can no long move the feeler gauge in and out or so that it just barely slips out? Also when you re-torqued the head how much did you find it loosened?



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BillWV

09-02-2004 09:35:18




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 Re: Super C Valve Clearance Cold in reply to JBlavl, 09-01-2004 08:40:09  
I"ve heard of two other ways to use feeler gauges.

One is to set a micrometer to the correct setting (in this case .017) and then practice with your feeler gauge to get the feel for it.

Another is to use the "go-no go" method. Bracket the desired thickness above and below; in this case, .016 and .018. Set the valve clearance so that it is loose on the .016 but the .018 won"t go.
Good luck,
Bill

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Gene

09-01-2004 09:28:23




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 Re: Super C Valve Clearance Cold in reply to JBlavl, 09-01-2004 08:40:09  
Feeler gage needs to slide in and out - just touching both the rocker arm and valve stem. This is done by feel - not to loose - not to tight.

Re-torque. It's going to vary. Some nuts may be tight, some may be 5 or so lbs loose. There isn't a standard answer. You just need to re-torque the head bolts.



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