| GregKnod |
Sat Jan 03, 2009 11:41 am |
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My 73 Weekender has the triangle shaped exhaust flanges - all of my flanges, except for the rear most (closest to the muffler) have gaps between the bolt holes - kind of warped, I guess you could say.
Do you think these flanges could be heated and hammerd straight? What's the best way to fix this? |
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| busdaddy |
Sat Jan 03, 2009 11:44 am |
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| A couple of whacks with a BFH and file them flat. Usually doesn't need heat. |
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| kevin77westy |
Sat Jan 03, 2009 3:22 pm |
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| Some claim that beating the flanges back a little more than flat will give you a better seal when it you tighten it all up since they will bend back a little when torqued down.. I've tried both hammering them straight and then a bit more on one stubborn case and still had leaks. I have had luck filing them down but not this past time. For those I end up taking them to a shop to have them ground a bit to get it all straight and even on the sealing surfaces. That finally did the trick.. Good luck.. |
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| GregKnod |
Sat Jan 03, 2009 4:18 pm |
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| Beating them back beyond straight sounds like a good idea - I'll try that. Thanks! |
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| alikatcraig |
Sat Jan 03, 2009 4:18 pm |
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I've used the large belt sander with steel backing plate at work. Most aftermarket headers don't use thick enough flanges to avoid warpage.
Al |
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| GregKnod |
Sat Jan 03, 2009 5:50 pm |
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| I've got one of those at work too - but the current condition of the belt is good for polishing shoes, not for grinding iron! |
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| GusC2it |
Sat Jan 03, 2009 6:19 pm |
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| I also use copious emounts of high temp silicone on the gasket. |
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| Blaubus |
Sat Jan 03, 2009 6:40 pm |
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| i just whack em flat and then grind and file even flatter. |
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| tmcdade |
Sun May 01, 2011 7:00 pm |
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| Should the flanges be flat when a straight edge is held across both flanges (where they meet the heads) at the same time? |
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| Wildthings |
Sun May 01, 2011 8:30 pm |
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tmcdade wrote: Should the flanges be flat when a straight edge is held across both flanges (where they meet the heads) at the same time?
You want to buy a nice big bastard file that will span the distance between the two flanges. Then carefully work the flanges until the file contacts both flange surfaces at all points. |
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| VDubTech |
Sun May 01, 2011 8:39 pm |
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GusC2it wrote: I also use copious emounts of high temp silicone on the gasket.
Absolutely. I do the same, never a leak. |
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