Today I was doing some maintance on my '94 PSD and finally decided to dive into my small coolant leak. Found out it was the lower rad hose tube o-ring. Advance Auto was no help (go figure) so I drove down to O'Reilly's and got PN 36610-1 replaces PN F4TZ8255A. I searched the forums for any insight, but I don't like spending too much time in front of a computer. I'm fearfull that I got the wrong o-ring. It fits, and looks almost more like what Caterpillar would call a D-Ring, but it says it's for the water outlet pipe. Are the two the same O-Ring? I just thought I'd ask, see if I got any bites. Thanks All

SchaefferUSMC