where is the oil pressure relief valve at in a 2003 ford focus
its in oil pump some engines have a oil filter relief valve in behind the oil filter that can cause this problem but not certain if your engine does but worth a check
The oil pressure relief valve is a type of valve used to control the oil pressure in the car engine. Oil pressure can build up by a motor malfunction, low volume of oil, instrument or equipment failure, or fire. Basically, oil pressure is relieved by allowing the pressurized oil to flow out from an auxiliary passage system. The relief valve is designed or set to open at a predetermined set pressure to protect pressure vessels and other equipment from being subjected to pressures that exceed their design limits. When the set pressure is exceeded, the relief valve becomes the path of least resistance as the valve is forced open and a portion of the fluid is diverted through the auxiliary route. In the 2003 Ford Focus, 3.8 engine, the oil pressure valve is located on the back of the timing cover above where the oil pump bolts up... don't install it backwards you will have the same problem... while everything is dismantled, I suggest you change your oil pump, also; and you will get a new pressure relief valve with it. I hope this helps Papaw
Oil Pressure Relief Valve
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