115 radiator bubbling and foaming

Posted by JRPackard37 On 2019/6/4 21:43:13

Hello Everyone,

Is it normal for a 1937 115 with a 1938 110 engine in it to have the radiator bubble and foam when looking into it with the radiator cap off? Everything else is great with the car but it does seem to bubble and foam especially when the gas is pressed down in neutral instead of idle. It almost will bubble over the open radiator cap with the engine revved in neutral. I know that the bigger water pump on the 38 pumps 36 gallons per minute. I read where the level in the radiator should be about 1.5 to 2 inches above the level of the tubes perhaps mine is a little to full? About half my index finger will be submerged if I stick it in the radiator. Was it normal for these cars to have some bubbling, foaming and turning of the radiator when the car is warm? should I be worried about a pressurized exhaust gas leak into the radiator fluid from the head gasket. No white exhaust smoke, the milky oil either.

I don't want to be an alarmist but I was just looking to better understand my car that I have had for 2 years.

Thanks

James