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I find myself doing quite a few valve covers so I've run into this a few times... having had any problems yet, but I want to ask anyway to make sure I'm headed in the right direction.
Most of the valve covers I get are not too bad. They are somewhat dirty and have very little oil on the outside surface. I usually clean 'em, blast them, and wash them down well before off gassing. There's usually a bit of oil on the inside that will burn off and come out of the oven every time I open the door, usually 2-3 times. By the time I'm ready to shoot powder and cure there's very little oil left to burn.
However, every once in a while I will get a valve cover that has A LOT of oil on the inside. Places where I can't really wash down or hit with the blaster. I usually stick these in the oven and off gas them for 1+ hour. Usually open the door every few minutes and let all that oil smoke out. I got this pig sitting in the oven for almost an hour already, and it just keeps smoking itself out.
Does this have any sort of negative impact on the surface? I can't imagine it does much that could actually hurt the powder once it cures, but I want to make sure. Also, is there a better way to clean the inside? There is usually areas that cannot be reached, so burning the oil off is the only way I can really deal with it. Any suggestions? Thanks guys!
Juan
Most of the valve covers I get are not too bad. They are somewhat dirty and have very little oil on the outside surface. I usually clean 'em, blast them, and wash them down well before off gassing. There's usually a bit of oil on the inside that will burn off and come out of the oven every time I open the door, usually 2-3 times. By the time I'm ready to shoot powder and cure there's very little oil left to burn.
However, every once in a while I will get a valve cover that has A LOT of oil on the inside. Places where I can't really wash down or hit with the blaster. I usually stick these in the oven and off gas them for 1+ hour. Usually open the door every few minutes and let all that oil smoke out. I got this pig sitting in the oven for almost an hour already, and it just keeps smoking itself out.
Does this have any sort of negative impact on the surface? I can't imagine it does much that could actually hurt the powder once it cures, but I want to make sure. Also, is there a better way to clean the inside? There is usually areas that cannot be reached, so burning the oil off is the only way I can really deal with it. Any suggestions? Thanks guys!
Juan
The cleaner wasn't all gone and it ignited. 
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