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I cleaned the groove, oiled it.

I hope you didn't literally use oil. If so, the O-ring probably swelled up and broke seal. I normally use waterpump RTV on the O-ring back there.


Richard E
1989 Montero - Stock-ish
1989 V6 Auto Raider - 5.3 Vortech Swap.
1987 Mitsubishi Starion 2.6t, soon to be 3.5
1983 Honda XL600R