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Radiator Flow Testing IF THE IMAGE IS TOO SMALL, click it. With…

Radiator Flow Testing IF THE IMAGE IS TOO SMALL, click it. With the engine cold, fan removed, and radiator wet; watch the fins as the engine warms up to temperature. When the thermostat opens, fog will rise off the fins on flowing core tubes. Those that stay wet (at the bottom) are plugged. This one has none that stayed wet, so the radiator's coolant side is working perfectly. I've seen them with ~1/4 blocked internally still run without getting too hot. But this does not test for AIR flow through the fins...
Radiator Flow Testing IF THE IMAGE IS TOO SMALL, click it. With the engine cold, fan removed, and radiator wet; watch the fins as the engine warms up to temperature. When the thermostat opens, fog will rise off the fins on flowing core tubes. Those that stay wet (at the bottom) are plugged. This one has none that stayed wet, so the radiator's coolant side is working perfectly. I've seen them with ~1/4 blocked internally still run without getting too hot. But this does not test for AIR flow through the fins...Original file
Radiator Flow Testing IF THE IMAGE IS TOO SMALL, click it. With the engine cold, fan removed, and radiator wet; watch the fins as the engine warms up to temperature. When the thermostat opens, fog will rise off the fins on flowing core tubes. Those that stay wet (at the bottom) are plugged. This one has none that stayed wet, so the radiator's coolant side is working perfectly. I've seen them with ~1/4 blocked internally still run without getting too hot. But this does not test for AIR flow through the fins...

Radiator RepairView all 15

Radiator core laid face-up on cardboard, plastic end tanks and inlet/outlet necks visible Rusty steel V-8 fan shroud on garage floor, hand-labeled with measurement notes 1983 Ford Bronco photo Radiator core with corrosion and chrome cap, propped outdoors near a truck Ford radiator tank with oval logo and stamped code, weathered metal surface 1983 Ford Bronco photo 1983 Ford Bronco photo 1983 Ford Bronco photo Close-up of black plastic radiator/shroud part with molded circles and pointer marks 1983 Ford Bronco photo 1983 Ford Bronco photo Hand using blue-handled pliers on a radiator fitting outdoors 1983 Ford Bronco photo 1983 Ford Bronco photo Radiator with fins being checked for blockage using a rod 15photos in this albumView all

Radiator Flow Testing
IF THE IMAGE IS TOO SMALL, click it.

With the engine cold, fan removed, and radiator wet; watch the fins as the engine warms up to temperature. When the thermostat opens, fog will rise off the fins on flowing core tubes. Those that stay wet (at the bottom) are plugged. This one has none that stayed wet, so the radiator's coolant side is working perfectly. I've seen them with ~1/4 blocked internally still run without getting too hot.

But this does not test for AIR flow through the fins...

Owner caption · Photo 6421 of 6546

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