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X-tremely HOT manifold!!!

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Ron Ca.

05-13-2003 07:39:00




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Just finished ring and piston job on 8-N front mount dist. This tractor has 12 V conversion. Starts good sounds good. But, manifold burned new heat resistant paint to white. I can actually feel excessive heat. Not sure if coil is 6 or 12 volt. Could this be part of problem. All ideas are greatly appreciated. BTW: Tractor ran well prior to work done. Just smoked alot. Didn't do anything to valves!
Thanks Ron.

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Bob

05-13-2003 11:28:53




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 Re: X-tremely HOT manifold!!! in reply to Ron Ca., 05-13-2003 07:39:00  
Late ignition timing, whatever the cause, will cause an extemely hot exhaust manifold. The posts that tell you a red-hot manifold is normal are correct IF you are pulling the guts out of the tractor, but not if you are playing around with it under no load, or light load.



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MikeC

05-13-2003 11:45:44




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 Re: Re: X-tremely HOT manifold!!! in reply to Bob, 05-13-2003 11:28:53  
They will burn the paint off even under minimal load. You don't have to "pull the guts" out of the tractor. I wouldn't consider finish mowing "pulling the guts" out of the tractor.



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jeb2n

05-13-2003 09:53:53




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 Re: X-tremely HOT manifold!!! in reply to Ron Ca., 05-13-2003 07:39:00  
Anybody ever think of powdercoating the manifold? From what i've heard, the powdercoat almost bonds into the metal itself..if you hit it with a hammer or bend the part, the powdercoat doesn't come off or flake. It's in there. Never tried it, and was wondering if anybody else had? I just hate looking at a rusty, half-paint-burned-off manifold when everything else is spotless...



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MikeC

05-13-2003 11:15:44




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 Re: Re: X-tremely HOT manifold!!! in reply to jeb2n, 05-13-2003 09:53:53  
You could if you had a show tractor. However, with a working tractor I prefer to see the regular patina of a manifold.

I've never done it but I would guess that powder coating may be pricey. There are some auto headers that are powder coated.



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Salmoneye

05-13-2003 07:59:10




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 Re: X-tremely HOT manifold!!! in reply to Ron Ca., 05-13-2003 07:39:00  
As stated below, the red-hot manifold is normal...

However, you can enrichen the mixture slightly and it will run a tad cooler...Read your plugs and either adjust the carb or don't accordingly...



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souNdguy

05-13-2003 07:54:00




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 Re: X-tremely HOT manifold!!! in reply to Ron Ca., 05-13-2003 07:39:00  
I agree with mikec.. those paints uaually only specify 1200 - 1500 degrees for x time... cherry red is pretty hot.

Your coil voltage won't make a difference on how hot your manifold is. If it a 6v front coil.. make sure you have the correct resistors inline with it for that 12v conversion.

good luck, and happy tractoring.

Soundguy



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MikeC

05-13-2003 07:46:37




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 Re: X-tremely HOT manifold!!! in reply to Ron Ca., 05-13-2003 07:39:00  
Ron,
If you ever plow with your tractor you will see that manifold get cherry red at night. When I did mine it also took off the heat resistant paint the first time I ran it hard. First turned it white then went to the nice patina. Nothing to worry about.



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