Volvo DL 1981 Owner Manual

VI Engine Evaporative Emissions, Page 74 of 127 pages for Volvo DL 1981 Owner Manual. The Owner Manual is applied into the following products: GL 1981, GT 1981

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1981 Volvo DL, GL and GLT Catalytic Converter This is a supplementary device in the exhaust system, designed to clean the remaining dirty exhaust gases. This device is mainly a container with a ceramic material insert, designed to let the exhaust gases pass through channels in the insert. The channel walls are covered by a thin layer of platinum and rhodium. These metals act as catalysts, permitting a chemical action to occur without actually taking part in it. The carbon monoxide content will increase if the Catalytic Converter is damaged. CAUTION: Vehicles with Catalytic Converter must use unleaded fuel only. Otherwise the Catalytic Converter will become damaged and ineffective. Torque catalytic converter mounting bolts(all U.S.A. models and certain Canadian models) The Catalytic Converter mounting bolts should be re-torqued at the 600-1,200 mile inspection. VI Engine Evaporative Emissions Evaporative control systems Vehicles intended for the North American market are equipped with a gas evaporative control system, which prevents gas fumes from being released into the atmosphere. The system is comprised of an expansion chamber in the fuel tank, a roll-over valve on the cross member in front of the fuel tank, and a charcoal canister with built-in vacuum valve under the left front wheel housing. The components are interconnected by hoses which channel fuel vapor from the gas tank to the charcoal filter where they are stored until the engine is started and then drawn into the engine fuel induction system. Previous Next file:///K|/ownersdocs/1981/81_dl_gl_glt/81DLGLGLT_03a.htm (17 of 18)12/22/2006 10:28:38 PM

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