Town Car V8-4.6L VIN W (1997)
Oil Pressure Regulator Valve: Description and Operation
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System pressure is limited by an integral, internally vented relief valve which directs the bypass oil back to the inlet side of the oil pump.
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Relief valve calibration protects the system from excessive pressure during high viscosity conditions yet is designed to provide adequate
lubrication under high temperature and high speed conditions.
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Oil pump displacement has been selected to provide adequate volume to ensure proper oil pressure both at hot idle and maximum speed.
