| Which Sandwhich adapter plate are you using? Mocal? I'm not sure from your post where you think you're getting a leak from. The ports where the oil lines enter/exit the sandwich plate to run to your oil cooler? I know some of the sandwhich plates use exclusively BSP or NPT threads (not sure which). I believe NPT is tapered. I would check to make sure you've got the correct fittings and that it's not leaking at the transition from the ports to the fitting or the fitting to the -AN lines. This might help too: [ http://97.74.32.155/files/sp1t.pdf ]
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