The Ford Barn

henryford30 · 08-26-2022, 08:07 AM

Hello Specialists
I have a 30 Ford Coupe with a 4 Banger Engine and a High Compression Cylinder Head. (5,5:1 ?)
I have a temperature problem and can't get anywhere with it.
How do I start...
If I fill up the Radiator until I see the water in the Radiator, so not all the way to the Filler neck and then start the engine, I see a movement of water through the water pump. so far everything is ok.
When driving slowly about 20-25 Mls is also everything still OK.
At medium speed it pushes some cooling water about 1/2 to 1 gallon over the overflow pipe into the open, the radiator network is then no longer full of water and if I then still have to brake it pushes even more water out of the overflow. If I then open the radiator cap and let the engine rev higher, the remaining water becomes foamy and the water runs over the open filler neck into the open, although the radiator is no longer full. But I can drive slowly with the little water in the radiator until I am back home.
When I drive on the Highway around 40-45 miles I lose water through the overflow again, then the water temperature rises constantly, so I have to drive slower again to get down with the temperature.
At 25 degrees outside temperature, the problems come later, at 35 degrees then even earlier.
I have already flushed the radiator, unfortunately I can not say whether he cleanist or not.
I also did a CO test because of exhaust gases in the cooling water, because I thought the cylinder head gasket is defective. But here everything is OK.
Now I do not know in which direction to look, is it the radiator or do I have hotspots in the engine that tend to boil?

It would be great if you could help me with your knowledge there possibly further

With best regards from Munich /Gernmany

Jose

Translated with www.DeepL.com/Translator (free version)

08-26-2022, 08:07 AM	#1
henryford30 Junior Member Join Date: Aug 2021 Posts: 16	4 Banger with Temperature Problems.. Please Help Hello Specialists I have a 30 Ford Coupe with a 4 Banger Engine and a High Compression Cylinder Head. (5,5:1 ?) I have a temperature problem and can't get anywhere with it. How do I start... If I fill up the Radiator until I see the water in the Radiator, so not all the way to the Filler neck and then start the engine, I see a movement of water through the water pump. so far everything is ok. When driving slowly about 20-25 Mls is also everything still OK. At medium speed it pushes some cooling water about 1/2 to 1 gallon over the overflow pipe into the open, the radiator network is then no longer full of water and if I then still have to brake it pushes even more water out of the overflow. If I then open the radiator cap and let the engine rev higher, the remaining water becomes foamy and the water runs over the open filler neck into the open, although the radiator is no longer full. But I can drive slowly with the little water in the radiator until I am back home. When I drive on the Highway around 40-45 miles I lose water through the overflow again, then the water temperature rises constantly, so I have to drive slower again to get down with the temperature. At 25 degrees outside temperature, the problems come later, at 35 degrees then even earlier. I have already flushed the radiator, unfortunately I can not say whether he cleanist or not. I also did a CO test because of exhaust gases in the cooling water, because I thought the cylinder head gasket is defective. But here everything is OK. Now I do not know in which direction to look, is it the radiator or do I have hotspots in the engine that tend to boil? It would be great if you could help me with your knowledge there possibly further With best regards from Munich /Gernmany Jose Translated with www.DeepL.com/Translator (free version)