Take your cap to any McParts place. Ask them for a new cap. The new cap part number will be something like 7014, for example (CST brand caps) This is a "70" series cap at "14" psi. The "70" series are all the same size/design. So if you substitue a "7007" you have a cap of the same size/design with a 7psi rating. I experimented with different caps while troubleshooting what turned out to be a headgasket leak. I have run 7psi and 13psi caps with no issues at all. I see no reason to stress a 20+ year old cooling system. Of course the McParts brand caps are cheapies but for $5-6 I just put a new one on every year. RT

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