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F1 Flathead · 06-16-2010, 05:28 AM

Checked my heads last night and they were not drilled to the new, larger size. Worse than that, they were all limed up so that they were only about 1/4" in diameter. I cleaned them all out and will drill to the new, larger size. Should make a big difference. I've also managed to scrape and vacuum about 1 lb coffee can full of rust, sand and scale out of the block water passages. I'm thinking this thing will run nice and cool now. Any recommendations on what brand/type of head gasket to buy?

06-16-2010, 05:28 AM	#9
F1 Flathead Member Join Date: May 2010 Location: Brighton Michigan Posts: 47	Re: Wrong head gaskets on a 40 Merc? Checked my heads last night and they were not drilled to the new, larger size. Worse than that, they were all limed up so that they were only about 1/4" in diameter. I cleaned them all out and will drill to the new, larger size. Should make a big difference. I've also managed to scrape and vacuum about 1 lb coffee can full of rust, sand and scale out of the block water passages. I'm thinking this thing will run nice and cool now. Any recommendations on what brand/type of head gasket to buy?