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From your question, it appears you are completely rebuilding the engine. Part of the process of rebuilding an engine is to check the cylinder deck and head to ensure they are within flat tolerance. You do this by using a machined straight edge. If these areas are within tolerance, then you don't need to have then milled, just clean them up and Bob's your ...


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You'll want to drain the coolant out, of course. Then fill the cooling system with straight water and add dish soap, or better, an industrial degreaser like Purple Power. Run it for about 30 minutes, drain it out, and do another identical flush (water and whatever chemical you used the first time around). After that you'll want to do a third flush, but with ...


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