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38 coupe · 07-02-2010, 08:56 PM

Let the phosphoric sit until there is no observable reaction. This may take a couple days to a week. The easy way to do this is to tip your motor up onto the bell housing with the water pumps off and the heads on (cap off the water outlets in the heads). Yes, after the bubbling and fizzing has all stopped drain and refill with water and baking soda and repeat. Again probably at least a couple days. Then flush with a lot of water.

07-02-2010, 08:56 PM	#20
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 2,137	Re: New to the hobby, first Engine Let the phosphoric sit until there is no observable reaction. This may take a couple days to a week. The easy way to do this is to tip your motor up onto the bell housing with the water pumps off and the heads on (cap off the water outlets in the heads). Yes, after the bubbling and fizzing has all stopped drain and refill with water and baking soda and repeat. Again probably at least a couple days. Then flush with a lot of water.