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Discussion Starter #1
Hi, I just rebuilt my heater system in my 55 Chevy car using a new heater core and danchuks valve #014, now I am reading this valve can only handle 7 psi, I am planning on a blown big block in this car and running the 12-16 psi, any info on this?
 

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I don't think that the valve will be a problem at those pressures. The problem will be the heater core. They were designed for 7 PSI system pressure. If you have a newer core it may not be a problem. The repro Danchuck valves have a return spring that is too stiff. So, swap it out with your original, or your temperature control lever will tend to go the shut position.
 

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Discussion Starter #3
Ok thank you, the heater core I used was from classic industries, my old heater core had the capillary tube on it, is there still a spring?
 

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Yes. The spring ensures that the heater control valve goes shut when you move your temperature control lever to cool/ off.
 
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