Radiator Cap: Pressure or No Pressure?
I’m assuming the original radiator cap on my 1937 Hudson was a no pressure cap but I cannot find anything listed anywhere on it.
One of my 37’s has a 4lb cap & the other a 7lb cap. I’ve read that the 7lb cap could create problems (ie: blow the radiator) if the car had a no pressure cap originally. Does anyone have a recommendation on pressure & also have a good part number for one?
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