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Case Tractors Discussion Forum

Case SC manifold problem solved

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Dave

03-27-2004 14:26:49

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This is just a quick note, I remember seeing someone said they had frost building up by the carburator on a SC. Well I HAD the same problem, what I did to fix it was make a new gasket and made sure the seal between the carb and the manifold were tight. TO check it I started the tractor and sprayed starting fluid at the seam. When the tractor raced I know there was a leak. After the new gasket I made was installed it did not do the same thing. The frost must have something to do with bringing air through the air cleaner and some air through the split.

but It solved my problem.

just a QUICK note.

Dave in Wisc

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brent

03-28-2004 12:00:22

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Re: Case SC manifold problem solved in reply to Dave, 03-27-2004 14:26:49

That's a good idea to check for leaks through the carb gasket, and manifold gasket as well.

I don't quite understand how air entering through a gasket leak would cause the manifold to get cold, though. Mine does the same thing, and the outside of the manifold ices up when conditions are right.

We had a thread a couple of years ago, discussing this very same issue. I think the concensus was that the manifold got cold because of the air/fuel mixture being expanded as it left the venturi (between the carburetor and manifold). The mixture, when expanded, would get cold (remember that stuff in chemistry?!), and transfer that to the manifold metal. At least, that's what I thought it was.

I'm going to fire mine up and check this out, at least I'll do the leak check...

It's got to be 70 deg outside today in NE Ohio!

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Bill

03-28-2004 06:01:03

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Re: Case SC manifold problem solved in reply to Dave, 03-27-2004 14:26:49

Dave,Thats a good way of checking to make sure the gasket is sealing, also works good for the manifold to engine gasket and throttle shaft on the carb. Its alot safer to use plain old carb cleaner then starting fluid in case you spray onto a warm manifold. Bill

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John Saeli

03-27-2004 17:43:10

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Re: Case SC manifold problem solved in reply to Dave, 03-27-2004 14:26:49

Hey Dave: Thanks for the tip.

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