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Bulletproof Diesel Oil Thermostat

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This is Bulletproof Diesel’s oil thermostat. Why do you want this? Because it allows your oil to bypass the oil cooler and return to the engine when ambient temperatures are cold enough to cause concern, or when resistance in your oil cooler is greater than 18 psi. When the oil warms up enough, the bypass valve closes and diverts all oil through the cooler again. cooler bypass oil to engine oil from cooler