Mark Taylor

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  • in reply to: Cap or Not to Cap… #736
    Mark Taylor
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    Bryan,
    I hope it is ok that I offer my two cents as a past Radiator shop owner. The amount of phone calls and extra delivery trips wore me out so we started to place a new radiator cap on every job that went out of our shop. Sometimes the radiator we picked up would have an old radiator cap and if the markings are not legible it is easy to figure out the pressure of the cap by compressing the internal seal and spring. You can also determine if it is a recovery system or open system by inspecting the inside of the old radiator cap for the rubber seal or just a bare metal disc. When we received an industrial radiator that had no cap but an overflow tube running down the side of the radiator rail we would know it was an open system. Based on the tank design we would either provide a 7lb or 10lb radiator cap. Chances are even if you provide a 7lb cap for a 10lb system the new 7lb radiator cap is going to hold more pressure than the worn out 10lb or 13lb original cap. When in doubt we would choose a lower pressure than the higher pressure. Also, you probably will call the customer to deliver an estimate of the cost to repair or replace so at that time we would ask about the pressure cap if we had doubts. We used hundreds of radiator caps a year and this eliminated the customer calls and traveling 80 miles round trip to deliver an inexpensive part which we were accused of not returning whether we left it off or not. We also added the cost of the radiator cap to the invoice and never once did we receive a complaint about a new radiator cap being added. A new overflow tube was placed on every radiator also. Hope this helps as it was my belief that the radiator cap and overflow tube made the job complete. +

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