If any of you have a Curtis oil pump and try to drive your truck in the winter, you know all about the problem with popping the oil filters. Plus it can't be good for the oil pump or oil cooler to see those ugly pressures.
The problem is there is no pressure relief on the big pump. Unlike the OEM. So I whittled out a pressure relief valve on the lathe and installed it this last weekend. I would have used the plugged port on the top of the Filter Adapter to tap into the pre-Filter oil, but it was already being used for the fuel pump pressure switch. So I used a sandwich plate I had on the shelf from a previous project.
The setup takes the oil from just before the filter and dumps it back into the filler neck if it goes over pressure. The relief is set to crack open at ~100 PSI warm right now which seems to be about right to keep pressure post filter below 90 PSI cold (15*F so far) yet 70+ PSI while warm.
All in all, I am very happy with this setup so far. It is nice to be able let the truck get cold and not worry about popping the filters. If I was to do it over, I would make the whole thing part of a sandwich plate and dump the oil directly into a tap in the oil pan.
The problem is there is no pressure relief on the big pump. Unlike the OEM. So I whittled out a pressure relief valve on the lathe and installed it this last weekend. I would have used the plugged port on the top of the Filter Adapter to tap into the pre-Filter oil, but it was already being used for the fuel pump pressure switch. So I used a sandwich plate I had on the shelf from a previous project.
The setup takes the oil from just before the filter and dumps it back into the filler neck if it goes over pressure. The relief is set to crack open at ~100 PSI warm right now which seems to be about right to keep pressure post filter below 90 PSI cold (15*F so far) yet 70+ PSI while warm.
All in all, I am very happy with this setup so far. It is nice to be able let the truck get cold and not worry about popping the filters. If I was to do it over, I would make the whole thing part of a sandwich plate and dump the oil directly into a tap in the oil pan.
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