Anyways, I'll just post text and not a video. I bought the Harbor Freight Cooling Pressure Tester and the black adapter fit perfect. Pressurized to 12 psi (same as stock overflow cap psi) and it held. The video I took of it holding 12 psi steady for a minute. I even took off the oil cap just to make sure I wasn't sealing it. Same same, no leaking and had it hold for 10 more minutes.
I am thinking the PO put oil in the overflow tank and at the same time the overflow cap is bad.
Your thoughts?
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