ZEST BOLT Service Manual

ENGINE 1.3L QUADRAJET (90PS) 69 3A.1.4. LUBRICATING SYSTEM The lubrication system of 1.3 QUADRAJET consists of two main components which are Oil FilterAssembly with Heat Exchanger and Oil Pump. It also includes the various internal oil flow circuits and oil jets fitted in the engine to lubricate the vital areas and components of the engine, including the line to lubricate Turbocharger. A. COMPONENTS OIL FILTER AND HEAT EXCHANGER ASSEMBLY This assembly includes both the filter element and the heat exchanger with the oil filler plug at the side. 1 - Oil filler plug 2 - Filter element cover 3 - Oil /water heat exchanger ENGINE OIL PUMP 1 – Partition 2 - Oil supply duct 3 - Driven gear 4. Drive gear 5 - Low pressure chamber 6 - Relief valve 7 - Pressure chamber 8. Duct between high and low pressure B. CONSTRUCTIONANDWORKING: The engine oil is drawn in by the sump by means of the vacuum created by the rotation of the gears on the crankshaft. There is a vacuum from the partition (1) for the gears as far as the oil sump suction head. The pressure develops starting from the partition (1) in all the engine supply ducts (2). When the pressure exceeds 5 bar, the force exerted on the restrictor valve (6) overcomes the reaction of the spring underneath and moves the valve until the connecting duct (8) between the pressure chamber (7) and the low pressure chamber (5) opens.