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N52 Oil Cooler Installation
As I run HPDE events here in South Florida I run on some pretty hot days. I got concerned when I started seeing oil temps rising above 250 degrees at Sebring. As there is little info available on these cars I did some homework. I found out the oil filter housing on the N52 has the same part number as the N54. A little further digging and I found you could mount the N54 oil thermostat housing to the N52 oil filter housing which allows you to hook up an oil cooler. The only other mod required was to block the coolant line that fed the N52 heat exchanger. While on that topic it must be noted the N52 oil cooler isn't a cooler, its a water/oil heat exchanger whose function is heat up the engine faster to meet smog requirements.
The first picture shows the stock heat exchanger
The second picture shows the oil cooler thermostat housing install
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