Thermostat replacement?

2000 LEXUS ES 300
165,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
CARPETMAN
  • MEMBER
  • 4 POSTS
Where is the thermostat located on a 2000 Lexus es300. I followed the upper radiator hose and took apart what i thought was the housing but this wasn't it. I've found several different answers for several year models but not this one in particular. Also would a stuck thermostat cause my car not to go into overdrive? I'm getting a code for insufficient temp for closed loop and knock sensor codes but nothing for my transmission. Pleaaaase help
Aug 27, 2009 at 7:24 AM
Advertisement
Avatar
2CARPRO JACK
  • CERTIFIED EXPERT
  • 11,533 POSTS
Yes, that can cause that code.Follow the lower hose to the engine, there you will find the t-stat housing. Here is a guide to help you step by step with diagrams below to show you on your car.

https://www.2carpros.com/articles/replace-thermostat

Check out the diagrams (Below). Please let us know what happens.
Image (Click to enlarge)
Attached Media
Aug 27, 2009 at 7:44 AM
Avatar
CARPETMAN
  • MEMBER
  • 4 POSTS
I think I see where it should be. Looks difficult to get to. What is the best plan for accessing it. Or am I in over my head. I'm not a mechanic obviously but would like to do this myself. thanks in advance
Aug 27, 2009 at 7:54 AM
Advertisement
Avatar
2CARPRO JACK
  • CERTIFIED EXPERT
  • 11,533 POSTS
I dont believe it is too difficult, just take your time and look at it for a minute before taking too much stuff apart.I cant find any pics or procedures for replacing it.
Aug 27, 2009 at 12:27 PM
Avatar
CARPETMAN
  • MEMBER
  • 4 POSTS
could this cause my car to not go into overdrive?
Aug 27, 2009 at 8:50 PM
Avatar
2CARPRO JACK
  • CERTIFIED EXPERT
  • 11,533 POSTS
Possibly.If it wont go into closed loop or is taking too long, the PCM may shut down particular things that it deems an issue for the particular code it has. You will need to clear the code when you are done and see what happens
Aug 28, 2009 at 7:38 AM
Avatar
55LJ
  • MEMBER
  • 1 POST
Engine Cooling problem
1995 Lexus ES 300 4 cyl Front Wheel Drive Automatic

How to locate and change?
Dec 7, 2020 at 8:26 AM (Merged)
Avatar
BLUELIGHTNIN6
  • CERTIFIED EXPERT
  • 16,542 POSTS


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_2361.jpg


https://www.2carpros.com/forum/automotive_pictures/261618_Noname1_5.jpg

Dec 7, 2020 at 8:26 AM (Merged)
Avatar
SMOOTH1234
  • MEMBER
  • 1 POST
do i have to remove the alternator to remove the thermostat
Dec 7, 2020 at 8:26 AM (Merged)
Avatar
BLUELIGHTNIN6
  • CERTIFIED EXPERT
  • 16,542 POSTS
To remove tstat you will first want to take the front right tire off then the dust guard for it; the thermostat housing should now be visable. Then you will want to take the plastic windshield washer, and engine coolant reserviors off to make the job easier. Next take the bottom rad. hose off the water pump(where it goes to, from the radiator). then take the three nuts that hold the thermostat housing together. Once these are off you can unplug electrical plug on top of the housing, pull that part of the housing off and there the thermostat sits
Dec 7, 2020 at 8:26 AM (Merged)
Avatar
JAZTELLO
  • MEMBER
  • 1 POST
i need to see a diagram of where the thermostat is located because my radiator broke..& now its fixed & its still over heating. I have bought the thermostat I jus need to know and see a visual where bout it is. thanks.
Dec 7, 2020 at 8:26 AM (Merged)
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.


https://www.2carpros.com/forum/automotive_pictures/12900_t_27.jpg

Dec 7, 2020 at 8:26 AM (Merged)
Avatar
BIG HAPA
  • MEMBER
  • 1 POST
Where can I locate the thermostat?
Dec 7, 2020 at 8:27 AM (Merged)
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS


https://www.2carpros.com/forum/automotive_pictures/12900_ts_5.jpg

https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
Dec 7, 2020 at 8:27 AM (Merged)