Vintage Mustang Forums - View Single Post - 351c Won't RUN after Rebuild- carb backfire
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post #17 of (permalink) Old 09-07-2019, 09:45 PM
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Originally Posted by Oldhenry1 View Post
Does the engine have the water outlet/thermostat restrictor installed? It's a brass disc that is installed in the block below the thermostat. Clevelands need this to stay cool. It's easy to overlook.
^^^ Ditto. The 351C uses a Cleveland-specific thermostat and a metal disc that closes off the internal bypass when the thermostat opens. Without the disc in place coolant will recirculate back into the engine instead of going out to the radiator.


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