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EFV-8 Club Forum / General Ford Discussion / water temp

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Drbrown

07-12-2025 @ 7:24 AM

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I have not used it but my '47 came with a home-made circular shroud made of sheet metal and rubber that gets mounted on the engine side of the radiator and forms a circle around the fan. Four bent steel angles attach it to the radiator frame. It has a rubber strip around the edge that seals the shroud against the radiator. The shroud forces the fan to suck air thru the radiator, greatly increasing the fan's effectiveness.

tpls46ford

07-09-2025 @ 12:20 PM

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Thanks! I'll proceed that way.

tom

carcrazy

07-09-2025 @ 12:04 PM

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Hi Tom, I did not ad an additional shroud around the cooling fan assembly. My advice would be to install the the cooling fan on the upper third of the radiator where the coolant coming into the radiator is hottest. Once you have the fan installed and working, drive the car to determine if the engine is running cool and not overheating. If the engine still overheats, install cooling shroud(s) as required to force the air to flow through the radiator. Also you can install rubber seals (can be made from old inner tubes) around the outer edges of the front of the radiator to get the maximum amount of air to flow through it.

tpls46ford

07-09-2025 @ 7:31 AM

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did you add an additional shroud to the new fan assembly?

tom

tpls46ford

07-09-2025 @ 7:17 AM

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Thanks for the information!!!

tom

carcrazy

07-08-2025 @ 3:56 PM

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For maximum cooling efficiency the electric cooling fan should be mounted so it pulls the air through the radiator. Fans mounted in front of the radiator will block the airflow passing through the radiator. If your electric cooling fan is of adequate capacity and efficiency to cool the engine, you won't need to keep the engine mounted mechanically driven fan.

tpls46ford

07-08-2025 @ 2:42 PM

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going to leave the existing 4 blade on as well

tom

tpls46ford

07-08-2025 @ 2:39 PM

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got the fan and some mounting hdw. Got it from speedway motors. Its designed to mount either outside on inside of the radiator. My thought is to mount it outside of the radiator. When it is on it would be blowing air into the radiator core. I know it will need modify brackets to install. I should be able to figure out mounting it. Supposed to fit in 46-48's Should have by friday

tom

carcrazy

07-08-2025 @ 8:00 AM

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If you are willing to convert to a 12V electrical system and use an alternator that has an output of at least 60 amps, you shouldn't have any problem powering the cooling fan.

Drbrown

07-08-2025 @ 7:42 AM

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MY thoughts ...... RADIATOR: When cold, coolant level in neck of radiator should be about 2 inches below top of neck. Provided the radiator fins are clean and clear this should allow adequate space for expanded coolant. THERMOSTAT PLACEMENT: I bought a short piece of rubber radiator hose at NAPA that fits just inside the hose going from top of head to radiator. Cut two - one inch lengths, put inside both hoses, pressed onto head outlet to position it, then remove the whole and glued the inserts in place with rubber glue. This keeps the stats in position. Drilling smal hole in stats does encourage minimum flow so the stat functions sooner. TEMP: My '47 runs at about 160 deg without thermostates on a 70 deg day. Tried 185 stats but it would start to run hot if standing in traffic on a hot summer day. Presently have 165 deg stats and works fine and I avoid traffic jams. Note that right and left side of block do not generate same amount of heat due to block casting differences. If a heater hose is tapped off one side (usually passenger side) it will also present differences. STOCK FAN'S: Too much space between fan blades and opposing face of radiator encourages over-heating because the fan is not sucking enough air THRU the radiator i.e. when car standing still, the fan is just thrashing air AROUND in the engine compartment around. Shim as required but leave at least one inch clearance. Note that there are Truck fan blades that have six blades - but hard to find. ELEC FANS: I tried an electric fan once. Had to increase my alternator size to feed it. Was not satisfied with performance so removed it.

This message was edited by Drbrown on 7-8-25 @ 7:59 AM

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