Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 11 21ppw756 onvein40
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16-1
COOLING - COOLING SYSTEM
COOLING SYSTEM
160M5-02
ON-VEHICLE INSPECTION
1. INSPECT COOLING SYSTEM FOR LEAKS
CAUTION:
To avoid the danger of being burned, do not remove the ra-
diator cap while the engine and radiator are still hot. Ther-
mal expansion will cause hot engine coolant and steam to
blow out from the radiator.
(a) Fill the radiator with coolant and attach a radiator cap tes-
ter.
A60522 (b) Warm up the engine.
(c) Pump it to 118 kPa (1.2 kgf/cm2, 17.1 psi) and check that
the pressure does not drop.
HINT:
If the pressure drops, check the hoses, radiator and water
pump for leaks. If the coolant has not leaked outside, check the
heater core, the cylinder block and the cylinder head.
2. CHECK ENGINE COOLANT LEVEL AT RESERVOIR
(a) Check that the engine coolant level is between the "LOW" and "FULL" lines when the engine is cold.
HINT:
If it is below the "LOW" line, check for leaks and add "Toyota Super Long Life Coolant" or similar high quality
ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid
organic acid technology up to the "FULL" line.
3. CHECK ENGINE COOLANT QUALITY
(a) Remove the radiator cap.
CAUTION:
To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator
are still hot. Thermal expansion will cause hot engine coolant and steam to blow out from the radiator.
(b) Check around the radiator cap and radiator filler hole for any excessive deposits of rust or scale, and
that the coolant is free from oil.
HINT:
If excessively dirty, replace the coolant.
(c) Reinstall the radiator cap.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2501
16-2
COOLING - COOLING SYSTEM
4. INSPECT FINS BLOCKAGE
(a) If fins are clogged, wash them with water or a steam
cleaner and dry with compressed air.
NOTICE:
S If the distance between the steam cleaner and the
core is too close, there is a possibility of damaging
the fins, so keep the following injection distance.
Injection Pressure Injection Distance
A73603
kPa (kgf/cm2, psi) mm (in.)
2,942 to 4,903
300 (11.811)
(30 to 50, 427 to 711)
4,903 to 7,845
500 (19.685)
(50 to 80, 711 to 1,138)
S If the fins are bent, straighten them with a screwdriver
or pliers.
S Be careful not to expose electronic components to
water.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2502
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