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Antique Tractor Paint and Bodywork

exhaust hole in hood

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sde

09-30-2006 08:39:00

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Would some of you share how you repaired the round exhaust opening in the top of a IHC tractor hood? I have two of them and I may have some time to try to repair them. I thought of trying to make a three inch punch and a die to create a new round opening that could be welded in as a replacement. SDE

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Brad_bb

10-05-2006 06:53:24

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Re: exhaust hole in hood in reply to sde, 09-30-2006 08:39:00

I"m not clear whether you are just trying to close up extra holes someone cut or remake an original hole. Either way...
You don"t need anything fancy to make a patch piece. Trace out the hole and make a nice tight fitting patch piece. If the hole is bent up and not flush all the way around, use a body hammer and dolly to straighten it out before making the patch. Clean up any edges with a file. If you need a little curvature on the patch it"s very easy to find something with a cylinder shape and just press it around there by hand. I"ve uses my CO2 tank before or other tube shapes depending on the approx radius I needed. The carefully tack the patch in place with a MIG making sure the position and height relative to the hood sheetmetal is correct. I then prefer to TIG weld small sections at a time until it"s fully welded. Tig welds and softer and can be hammered on if need be afterwards. Mig welds are too hard and won"t stretch. Then you can use sanding disk to clean up the weld -I like a mini pneumatic angle grinder with 3m 50 grit roloc sanding disks. Then you can go back with the hammer and dolly and adjust the patch as need be to get it even to just below the correct level. Then you must metal prep the area to neutralize any of the oxidation that welding begins. Then you are ready for filler/body work.

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glennster

10-02-2006 13:04:52

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Re: exhaust hole in hood in reply to sde, 09-30-2006 08:39:00

i just did one for a super m, welded in a patch, cut the opening with a hole saw, then i used a 2 " sanding drum on an air grinder. the hole seemed to be a little oblong on the origional, and the sanding drum will let you shape the hole a little at a time.

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Rod (NH)

10-01-2006 16:40:38

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Re: exhaust hole in hood in reply to sde, 09-30-2006 08:39:00

Hi,

If all you want to do is to make a round hole in a piece of sheet metal, have you thought of using a hole saw and cleaning up any rough edges with a die grinder or a round hand file. It seems to me that would be a lot easier than trying to make your own punch and die set. I suppose you could buy one for mucho money but that's not realistic for only a couple of holes.

Rod

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sde

10-02-2006 03:39:09

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Re: exhaust hole in hood in reply to Rod (NH), 10-01-2006 16:40:38

Thank you Rod. I thought that may be the eaiser way also. I was going to try and get the lip on the inside of the hole also. Somebody said to just weld the lip in as well. That is what I will most likely do.
SDE

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