I have problem with the radiator, it overfills the radiator on higher rpm, its puts out water by the drainpipe on the hiway in 40 mph. Can i grind of the blads in the waterpump or will a termostat slow down the water flow? I have heard thats a smaller belt wheel on crank is one way. Banger guys help me with this please.
The radiator is partially pluged. At more RPM's the motor is puting more coolant on top than can flow out the bottom. Messing with the water pump is not a good idea, it only covers up the real problem.
I have tried another radiator and its the same, they have the steel plate in the radiator in the top, banger guys now wath im trying to explane.
Mine always done that too. Previous A's and this one. I have used original as well as new aluminum radiator. I think original was partly clogged and the new has too small tubes. It did the same with original cap location and hidden cap located to right side. I have smaller aluminum pulley on one engine and it did not help much. I have not tried thermostat if it slows the flow. Now I have C head and B pump stock pulley and aluminum radiator on 32 shell. It still overflows 45-50 and up mph. Not a big problem to me. I don't drive much highway and I have temp gauge prop on the pump housing so I see when to add water.
From what I've read and heard, Model A water pumps are over achievers. A clogged original or a newer, more efficient(read smaller tubes) radiator can't handle all of the water being put through it by the pump. New water pumps come with the instructions to grind down the impellers if too much flow. I've also read of drilling holes in the impellers to reduce flow. Try The Ford Barn. It's a wealth of information for old Fords.
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