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40 Deluxe · 05-31-2013, 01:22 AM

Looking at the earlier photos, I see that the engine has an internal coating of that special black protective substance (some call it sludge, but I think it's a flathead's way of protecting itself during longterm outside storage). Maybe there's even a Ford part number for it?

05-31-2013, 01:22 AM	#42
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,778	Re: Flathead project Looking at the earlier photos, I see that the engine has an internal coating of that special black protective substance (some call it sludge, but I think it's a flathead's way of protecting itself during longterm outside storage). Maybe there's even a Ford part number for it?