Engine Oil Pressure Relief Valve – 2.5L NA Estimated reading: 1 minute Contributors Overview The oil pressure relief valve in the Porsche 944 3.0L S2 (1989–1991) regulates oil pressure to ensure proper engine lubrication. Maintaining this component is critical to prevent oil pressure issues that could lead to engine damage. For the 3.0L S2, the one-piece relief valve (part number 944 107 035 02) with corrosion treatment is used, requiring precise oil cooler housing alignment during installation to avoid binding. This procedure provides general information on the relief valve, including part numbers and installation considerations specific to the 3.0L S2. Oil Pressure Relief Valve Information The Porsche 944 3.0L S2 uses a one-piece oil pressure relief valve (part number 944 107 035 02) with corrosion treatment, introduced in later 1987 models and standard for 1989–1991 S2 variants. This valve replaced earlier designs and should be replaced during oil cooler seal repairs or if oil pressure issues are detected. Each relief valve requires an O-ring (944 107 935 11) and an aluminum seal ring (N 043 815 3), which must be replaced whenever the valve is removed. Note: Proper alignment of the oil cooler housing is critical to prevent binding of the relief valve. Use special alignment tool 9262/1 during installation for vehicles with relief valve 944 107 035 02. Relief Valve Applications Year Model Engine Valve Number 1989–1991 944 S2 3.0L 944 107 035 02 Sources Clark’s Garage Pelican Parts Porsche 944 Workshop Manuals YouTube Tagged:EngineOil Pressure Relief Valve Oil Pressure Relief Valve – 2.5L NA - PreviousOil Pan Removal – 2.5L NANext - Oil Pressure Relief Valve – 2.5L NAOil Pressure Sending Unit Replacement – 2.5L NA
