TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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CO/Cooling System14 / 30
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THERMOSTAT INSTALLATION — MK4 Supra Cooling System, page 14
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EG–342 ENGINE – COOLING SYSTEM Valve Lift P03042 2JZ-GE Jiggle Valve 2JZ-GTE Protrusion PI1770 (c) Check the valve lift. Valve lift: 8.5 mm (0.335 in.) or more at 95˚C (203˚F) If the valve lift is not as specified, replace the thermostat. (d) Check that the valve spring is tight when the thermostat is fully closed. If not closed, replace the thermostat. THERMOSTAT INSTALLATION 1. PLACE THERMOSTAT IN WATER INLET (a) Install a new gasket to the thermostat. (b) Align the jiggle valve of the thermostat with the protrusion of the water inlet. 2. INSTALL WATER INLET (a) Install the water inlet with the 2 nuts. Torque: 2JZ–GE 8.8 N·m (90 kgf·cm, 78 in.·lbf) 2JZ–GTE 21 N·m (210 kgf·cm, 15 ft·lbf) (b) 2JZ–GTE: Connect the lower radiator hose to the radiator. 3. 2JZ–GTE: INSTALL ENGINE UNDER COVER 4. FILL WITH ENGINE COOLANT 5. START ENGINE AND CHECK FOR COOLANT LEAKS RADIATOR RADIATOR CLEANING Using water or a steam cleaner, remove any mud and dirt from the radiator core. NOTICE: If using a high pressure type cleaner, be careful not to deform the fins of the radiator core. If the cleaner nozzle pressure is 2,942–3,432 kPa (30–35 kgf/cm2, 427–498 psi), keep a distance of at least 40 cm (15.75 in.) between the radiator core and cleaner nozzle. RADIATOR INSPECTION 1. REMOVE RADIATOR CAP CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot, as fluid and steam can be blown out under pressure.