1998 Toyota Sienna Thermostat replacement

Tiny
PAULTULIP
  • MEMBER
  • 1998 TOYOTA SIENNA
Engine Cooling problem
1998 Toyota Sienna 6 cyl Front Wheel Drive Automatic 170K miles

How do I remove the metal pipe that connects the lower radiator hose to the thermostat housing? Will I damage the rubber hose that connects to the housing if I remove it?
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Wednesday, July 14th, 2010 AT 6:38 PM

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Tiny
RASMATAZ
  • MEMBER
REMOVAL

HINT: Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

DRAIN ENGINE COOLANT
REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE
DISCONNECT ENGINE COOLANT TEMPERATURE (ECT) SWITCH CONNECTORS
DISCONNECT ENGINE WIRE PROTECTOR FROM WATER INLET AND RH CYLINDER HEAD


http://www.2carpros.com/forum/automotive_pictures/12900_t1_3.gif



Remove the 2 nuts, and disconnect the engine wire protector from the water inlet and cylinder head.

DISCONNECT WATER INLET PIPE FROM WATER INLET AND LH CYLINDER HEAD


http://www.2carpros.com/forum/automotive_pictures/12900_t2_2.gif



Remove the bolt, and disconnect the inlet pipe from the water inlet.
Remove the O-ring from the inlet pipe.
REMOVE WATER INLET AND THERMOSTAT


http://www.2carpros.com/forum/automotive_pictures/12900_t3_1.gif



Remove the 3 nuts, water inlet and thermostat.
Remove the gasket from the thermostat.

http://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Wednesday, July 14th, 2010 AT 6:51 PM

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