qewani1

Hi,

Could i have OEM part numbers for:
1. Engine Coolant Thermostat
2. Thermostat Gasket

As per below DIY
http://www.lexls.com/tutorials/cooling/thermostat.html

Do i need to disconnect the water inlet hose? Or i can just replace it by removing water inlet only with hose connected?

timmy0tool

iTrader: (7)

look it up here:
http://lexus.sewellparts.com/oem-cat...S400-2000.html

no need to disconnect the hose from the inlet if all you are replacing is the thermostat. just unbolt the inlet from the housing.

Stroock639

90916-03100 is the thermostat

16346-50010 is the gasket

disconnecting the hose will probably make it easier to collect the coolant that will drain out, the "official procedure" is to completely drain the coolant but that's a bit over the top. also not a bad idea to make sure that the coolant isn't still burning hot when you do this

qewani1

Thanks
Thermostat' s rubber was completely damaged.
Now my car' s engine does not run cold while driving and it reach normal operating temperature faster now!