My question to the collective is; would it be acceptable to use the aviation oil cooler that is already installed in conjunction with my currant water coolant system. My thinking is that an oil cooler, if I understand correctly, is more "durable" and able to withstand more pressure than the standard water radiator. Of course, there may be reasons other than pressure that would factor in, I just don't know them.

IIRC, oil pressure has been up to 75 psi, whereas stock coolant pressure caps are at about 13 and some in our uses some use 21psi caps. Thus, seemingly, this stock aviation cooler should be up to the task of being plumbed into my coolant system to provide heat for the cabin. I would think, perhaps in errors, that it should be at least as durable as a standard heater core. It would save a nice bit of time not having to redo the glass and plumbing at the front of the plane. I would like, in an ideal world, to remove the oil cooler from then nose, flush it and reinstall as a water radiator.