Thermostat location

Tiny
MOTHAFUKIN NANA
  • MEMBER
  • 2001 TOYOTA AVALON
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 2,000 MILES
I cannot find the thermostat in my car listed above it is the XL model.
Saturday, November 11th, 2017 AT 3:24 AM

8 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Here is a diagram of its location. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Saturday, November 11th, 2017 AT 5:21 AM
Tiny
DOIT4NOW
  • MEMBER
  • 1 POST
  • 2000 TOYOTA AVALON
  • 3.0L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 214,000 MILES
Where is the thermostat located
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hello,

Here is a guide to help walk you through the repair and a diagram below to show you how on your car.

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

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
KWARNER40
  • MEMBER
  • 1 POST
  • 2000 TOYOTA AVALON
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 147,000 MILES
Where is the thermostat located?
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
STEVEW84
  • MECHANIC
  • 673 POSTS


https://www.2carpros.com/forum/automotive_pictures/170495_thermostat_1.jpg



Its a bit of a PITA to do. its on the driver's side of the block. HTH.
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
GBRIGHT07
  • MEMBER
  • 1 POST
  • 2000 TOYOTA AVALON
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 165,000 MILES
Where is the thermostat located on a 2000 Avalon? How difficult of a reapir is it? What diagrams are available to view as a guide?
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
REMOVAL:

Position a suitable drain pan under the radiator drain cock and drain the cooling system.
On the 1MZ-FE engine, you may have to remove the air cleaner cap assembly. Be sure to label all wiring disconnected.
Disconnect the water temperature switch harness from the water inlet housing (except 5S-FE engines).
Remove the oil filter on 5S-FE engines that are equipped with an oil cooler.
On the 1MZ-FE engines, remove the heater hose covering the housing.
Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
Remove the thermostat and rubber O-ring gasket from the water inlet housing.


https://www.2carpros.com/forum/automotive_pictures/261618_1_35.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_2_66.jpg



https://www.2carpros.com/forum/automotive_pictures/261618_3_30.jpg



INSTALLATION:

Make sure all the gasket surfaces are clean. Clean the inside of the inlet housing and the radiator hose connection with a rag.
Install the new rubber O-ring gasket onto the thermostat.
Align the jiggle valve with the upper side of the stud bolt.
Position the water inlet housing with the thermostat over the studs on the water pump and install the two nuts. Tighten the two nuts to 78 inch lbs. (9 Nm) on 4 cyl. engines, 14 ft. lbs. (20 Nm) and 69 inch lbs. (8 Nm) on 1MZ-FE engines.

NOTE
Don't forget to install a new O-ring onto the water inlet pipe. Apply soapy water to the O-ring prior to installation.

Connect the lower radiator hose to the inlet housing and install the hose clamp. On the 1MZ-FE engine, tighten the bolt retaining the water inlet pipe to the cylinder head to 14 ft. lbs. (20 Nm).
Attach the water temperature switch connector.
On the 1MZ-FE engines, install the heater hose removed.
Install the oil filter and check the oil level if removed.
If removed, install the air cleaner cap assembly on the 1MZ-FE engines.
Fill the cooling system with a good brand of ethylene glycol based coolant.
Start the engine and inspect for leaks.
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Monday, September 7th, 2020 AT 11:54 AM (Merged)
Tiny
JAXN
  • MEMBER
  • 1 POST
The water inlet housing on my 2000 Avalon has THREE (3) studs/nuts, NOT two. Hopefully this will save some people some difficulty. I know other versions do only have two. I have the 1MZFE engine version MCX20L manufactured in 03/00. The picture shown here actually shows 3 studs but the wording says 2.
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Monday, September 7th, 2020 AT 11:54 AM (Merged)

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