The Ford Barn

J Witt · 07-18-2018, 09:53 AM

My '36 has had a leaking radiator cap since I bought the car. It came with a cap, without the wire bail, plus one of the, I think, Drake caps that has the bail. Both leak around the seal surface of the radiator neck. The leakage appears to occur mostly when the car is driven faster than 30-35 mph. Leakage has occurred with the original radiator and its replacement which is a new Brassworks radiator. The system has a Haney 3 psi valve on the overflow tube. I normally filll the header tank until fluid is about 1 inch or so down from the filler neck. Fluid is 50/50 antifreeze, engine temp about 190F.

Does anyone have suggestions about getting the caps to seal, or a replacement cap that works well.

Thanks to all,

John

07-18-2018, 09:53 AM	#1
J Witt Senior Member Join Date: Mar 2015 Location: Acworth GA Posts: 534	Leaking Radiator Cap My '36 has had a leaking radiator cap since I bought the car. It came with a cap, without the wire bail, plus one of the, I think, Drake caps that has the bail. Both leak around the seal surface of the radiator neck. The leakage appears to occur mostly when the car is driven faster than 30-35 mph. Leakage has occurred with the original radiator and its replacement which is a new Brassworks radiator. The system has a Haney 3 psi valve on the overflow tube. I normally filll the header tank until fluid is about 1 inch or so down from the filler neck. Fluid is 50/50 antifreeze, engine temp about 190F. Does anyone have suggestions about getting the caps to seal, or a replacement cap that works well. Thanks to all, John __________________ Houston, Tranquility base here. The Eagle has landed.