The Ford Barn

tubman · 02-10-2017, 04:26 PM

I just came into possession of an aluminum Sharp 4 BBL manifold for an 8BA. Although it is a solid piece, with no chips, cracks, or bad bolt holes, it must have been stored in less than ideal conditions for a long time, because the finish is quite corroded. A stock 8BA oil fill tube is installed, and it must have been there a long time as well, as it has substantial surface rust There is a lot of corrosion where the oil fill tube fits in the manifold. I have soaked it in PB Blaster for two days, and try as I might, I can't get it out. I have removed these tubes from several manifolds before and have never has one as stuck as this one. Because of the way the casting was made, you can't get in from the bottom and use a punch like I have done in the past. I think it is time for a little heat. It would seem that some heat applied to the manifold might be the best way to go, because I think aluminum expands more than steel. Or maybe I should heat the steel tube?

Does anyone have any insight on how to proceed with this?

02-10-2017, 04:26 PM	#1
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,639	Removing 8BA oil fill tube I just came into possession of an aluminum Sharp 4 BBL manifold for an 8BA. Although it is a solid piece, with no chips, cracks, or bad bolt holes, it must have been stored in less than ideal conditions for a long time, because the finish is quite corroded. A stock 8BA oil fill tube is installed, and it must have been there a long time as well, as it has substantial surface rust There is a lot of corrosion where the oil fill tube fits in the manifold. I have soaked it in PB Blaster for two days, and try as I might, I can't get it out. I have removed these tubes from several manifolds before and have never has one as stuck as this one. Because of the way the casting was made, you can't get in from the bottom and use a punch like I have done in the past. I think it is time for a little heat. It would seem that some heat applied to the manifold might be the best way to go, because I think aluminum expands more than steel. Or maybe I should heat the steel tube? Does anyone have any insight on how to proceed with this?