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EFV-8 Club Forum / General Ford Discussion / 1935 Fordor Touring Sedan

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Discussion Topic: 1935 Fordor Touring Sedan

carcrazy

10-02-2025 @ 9:23 AM

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Posts: 1979
Joined: Oct 2009

Remove the spark plugs and check the condition of each one of them. If coolant is getting into the combustion chambers, the spark plugs will show as either rusty or white.

There may be coolant leak(s) into the combustion chambers which may not show up as coolant in the oil or oil in the radiator.

If coolant is getting into the combustion chambers, the exhaust gases may show white vapor or be more moist than normal.

Howie1935

10-02-2025 @ 5:56 AM

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The level was well below the core when I added coolant. A full gallon on last trip. I don't see an overflow tube, see images.
Thoughts?
Dennis

carcrazy

09-30-2025 @ 1:41 PM

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Without having a pressurized cooling system, Ford Flatheads like to have the level of coolant in the radiator just slightly above the core. If you put more coolant than that in them, they will just push the extra amount out of the overflow tube. Each Flathead seems to set its own level. As long as you have a coolant level that is above the radiator core, I wouldn't worry about it. A good speed for travelling in a Flathead without overdrive is about 50 to 55 MPH. Once you get over that speed, higher temperatures will cause more coolant to be forced out of the engine.

Howie1935

09-30-2025 @ 11:36 AM

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I'm driving farther now that my brakes are working correctly to car shows. ISSUE: On first show, I traveled about 19 miles, most at about 50-60MPH. The two temp gages showed temp a bit over 150. When I returned home about 5 miles from home the temps started rising to over 200. Higher at a red light. Also I saw wild changes on gauges as water passed by. At home after cooling down I added about 1/2 gallon of coolant. A month later I went to another show out of town, about 25 miles. I was at about 60 most of the way. Temp same at a bit over 150 to maybe 160 on both gauges. I looked at radiator, hoses, and under car and all was dry except for a drop at the drain on passenger side below water pump. Again, on way home, temp started rising but not the surging I saw on pervious trip, just up to 190-200. After home and engine cool, I added a full gallon of coolant.

I don't have any oil in coolant, nor do I have any coolant in oil. No wetness under radiator or engine either. Again only a small drop at end of the one drain fitting on passenger side. I had a radiator pressure test kit but of course the adaptors don't adapt to the radiator.

Suggestions on how to pressurize the radiator or other things to find the issue?
Dennis (Howie 1`935)

This message was edited by Howie1935 on 9-30-25 @ 11:37 AM

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