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New GT40 heads, break in needed? Printed From: CorrectCraftFan.com Category: Repairs and Maintenance Forum Name: Engine Repair Forum Discription: Engine problems and solutions URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=25137 Printed Date: February-02-2025 at 3:47pm Topic: New GT40 heads, break in needed? Posted By: slmskrs Subject: New GT40 heads, break in needed? Date Posted: March-07-2012 at 5:10pm Just finished replacing my original GT40 heads with GT40Ps from Clearwater. Test started last night with no problem. Next is a water test. Is there any break-in required for the heads/valves? Only the heads were changed (same lifters, etc. used). ------------- Gordon '97 Ski Nautique, GT40

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