I crawled under the truck to take another look see and you guys are right. What do you think about an alternate based on my experience working on combustion and our bar furnaces at work which get extremely hot...... much hotter than the exhaust manifolds. Sometimes we get a hot spot where internal furnace heat burns through the skin of the furnace. We’ve had guys put K-wool over the holes which actually makes heat damage worse as the heat is concentrated on the outside of the furnace - where it doesn’t belong.
I had an old piece of 3”furnace pipe which I snaked up into place, which would not only create a shield but would also leave an air gap for additional heat dissipation. I would make a couple bolt attachment
Points so it doesn’t rattle or vibrate - then add self adhesive foilized reflective fabric like I did on my revamped bed to protect from the exhaust pipe heat?
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Here’s a similar pic of the replacement heat shield I built for under the bed with reflective material:
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metal shield was painted the Ford Grey and reflective material attached:
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