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rotorwrench · 05-14-2021, 10:22 AM

All of the flathead V8s will crack in the valve pockets if they get too hot. As mentioned, the chances of that do increase with closer distance to cylinder dimensions and especially if they are rode hard and put away wet. Higher performance generally means higher loading and that all turns into higher temperatures.

Take good care of the engine cooling system and it will take good care of you too.

05-14-2021, 10:22 AM	#13
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,006	Re: Pre 1945 Block Cams All of the flathead V8s will crack in the valve pockets if they get too hot. As mentioned, the chances of that do increase with closer distance to cylinder dimensions and especially if they are rode hard and put away wet. Higher performance generally means higher loading and that all turns into higher temperatures. Take good care of the engine cooling system and it will take good care of you too.