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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Inline 300 Headmen hedders problem

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Old Apr 4, 2023 | 07:01 PM
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Inline 300 Headmen hedders problem

After I noticed an exhaust leak, I decided to get A new gasket. After torquing them down in proper sequence, I noticed my header on the exhaust #1 seems bent or warped.



anyone else experience this? I have never ran this engine HOT and always followed proper torques. Anyone have a fix?
 
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Old Apr 5, 2023 | 04:43 AM
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You just found out why headers are not liked by some.
You can pull them and see if you an bend it but i dont think that will work.
Dave ----
 
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Old Apr 5, 2023 | 05:51 PM
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You will have to try different things. Do you have any old gaskets laying around? You could try a double gasket there and see if it seals. If you are brave, you could take a grinder and a file and grind that area flat and then use a new gasket. A straight edge layed on the header should help you get it straightened out.
 
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Old Apr 6, 2023 | 10:27 PM
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Originally Posted by FuzzFace2
You just found out why headers are not liked by some.
You can pull them and see if you an bend it but i dont think that will work.
Dave ----
Originally Posted by Franklin2
You will have to try different things. Do you have any old gaskets laying around? You could try a double gasket there and see if it seals. If you are brave, you could take a grinder and a file and grind that area flat and then use a new gasket. A straight edge layed on the header should help you get it straightened out.
i will live with the exhaust leak for a little. when i put my cam in (when they come back in freaking stock) i will try what franklin suggest, if it doesnt work out, oh well! learned my lesson on the headers.
 
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Old Apr 7, 2023 | 03:21 PM
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What you could try doing if the exhaust flanges are the same thickness as the intake flanges, get some steel bar and create a brace that can lay across the intake and exhaust flanges at the head using the bolts for the intake to hold it all square.

That is one idea I came up with looking at your layout. It appears the problem is caused by there being no support to keep that area of the exhaust flange in place.
 
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Old Apr 11, 2023 | 12:30 PM
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after heating the headers and attempting to "flatten" the headers, and using the double gasket seal, it has seem to close up a little more. i will learn to live with it until i get some time to either buy replacement headers or go to efi manifolds. the heddman headers are a PITA anyway.
 
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