The Hyundai Sonata is a mid-size sedan manufactured and marketed globally by Hyundai Motor Company since its introduction with model year 1988. The 1991 Sonata is equipped with 1.8 L 134 PS, 2.0 L 149 PS, 2.4 L 149 hp (111 kW) Hyundai Sirius I4s and an impressive 2.5 L 170 hp (127 kW) Hyundai Delta V6.

hyundai sonata cooling system The following article discuss about 1991 Hyundai Sonata Cooling System Service and Troubleshooting manual. Herein you will find detail specification of the cooling system, description of each parts and components function, maintenance, service, repair and troubleshooting procedures of the Sonata. This service manual is divided into following sections General Specification, Cooling System, Radiator, Radiator and Fan Motor Assembly, Water Pump, Thermostat, Water Hose and Pipe, Water Temperature Gauge Unit and Sensor.

The troubleshooting sections describes detail symptom, probable cause and remedy of the problems (e.g. low coolant level, clogged radiator, abnormally high coolant temperature, abnormally low coolant temperature, leakage from oil cooling system, and inoperative electrical cooling fan).

Find more information about Hyundai Sonata Cooling System – Schematics and Troubleshooting here – 4.78MB PDF file. (source:,

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