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Farmall & IHC Tractors Discussion Forum

504 manifold

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Dave8N in Pa

12-25-2016 08:05:25

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A street L is screwed into the end of my manifold, then pipe to the muffler. Is that original? Tapered pipe thread or standard bolt thread? The threads are in poor shape so I want to fix it right.

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12-25-2016 08:11:09

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 Re: 504 manifold in reply to Dave8N in Pa, 12-25-2016 08:05:25  
I just replaced Mine a few days ago 504 gas. The 90 belongs there it is pipe threads.

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Dave8N in Pa

12-25-2016 08:35:08

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 Re: 504 manifold in reply to danmcdonald, 12-25-2016 08:11:09  
Thank you sir, it is gas. I'm going to try to tap the threads a little deeper and see if it helps.

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12-25-2016 18:58:27

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 Re: 504 manifold in reply to Dave8N in Pa, 12-25-2016 08:35:08  
I tapped mine and used a new 90deg with a lock nut from the electrical conduit dept. After that I built a bracket so I could clamp it solid with muffler clamp. I drilled the bracket that holds the radiator to the head,I think I used a 2 1/2" clamp and spaced it to the IH bracket.(I sold the tractor 1 1/2 year a go.)

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