hot 430
start the engine, leave the radiator cap off. put your hand on the top radiator hose as the engine warms up. you will feel the hose warm as the thermostat opens. First thing i do with a heating problem is fill the radiator with water, then pull off the lower hose quickly. the water should gush out as fast as the outlet will allow. If not, the radiator is restricted. Go buy a $150.00 aluminum racing radiator, easy to mount. Regardless of what anyone tells you about even warm-up and all that,, take those junk thermostats out of the block where the water pump mounts to the block. The mercury dealer in town here took them out if my dad's 1958 383 Merc when it was 2 years old. did not need them then, do no need them now!!
If you had the heads off the engine, it is possible the head gaskets were installed with the water passage hole to the front?? Just use basic trouble shooting, take the good hints the other guys on this site gave you, keep at it, nothing that time and money can't fixx!!!!!!!!!!
start the engine, leave the radiator cap off. put your hand on the top radiator hose as the engine warms up. you will feel the hose warm as the thermostat opens. First thing i do with a heating problem is fill the radiator with water, then pull off the lower hose quickly. the water should gush out as fast as the outlet will allow. If not, the radiator is restricted. Go buy a $150.00 aluminum racing radiator, easy to mount. Regardless of what anyone tells you about even warm-up and all that,, take those junk thermostats out of the block where the water pump mounts to the block. The mercury dealer in town here took them out if my dad's 1958 383 Merc when it was 2 years old. did not need them then, do no need them now!!
If you had the heads off the engine, it is possible the head gaskets were installed with the water passage hole to the front?? Just use basic trouble shooting, take the good hints the other guys on this site gave you, keep at it, nothing that time and money can't fixx!!!!!!!!!!
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