Question about 1991 Lexus ES 250

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Where do you find the thermostat for the radiator on a 1991 lexus es 250?

Vehicle is overheating, replaced radiator hoses, still overheating, we think that the thermostat is stuck, but cant find it

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Hi, Most of the time you can follow the UPPER radiator hose to the engine and there will be the thermostat housing. On Reverse Flow cooling systems you follow the LOWER radiator hose. All the thermostat does is trap coolant in the engine until it reaches a certain temperature, then opens to the radiator to be cooled. Don't forget to bleed the air from the highest place in the cooling system. Sometimes that's the reservoir, but look for a small plug high on engine. Good luck

Posted on May 10, 2014

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Posted on Jan 02, 2017

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  • 32 Answers

SOURCE: Change spark plugs on Lexus ES 250

No you can get to them by using an extension on your rachet with a rotating socket. Play around with the extension and rotating sockets to see which works best.

Posted on Dec 24, 2008

mkv0525
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SOURCE: 1991 Lexus ES 250 Ignition Problem - Won't start

You need to check timing belt. could have broke belt.Also you should look at water pump if you replace belt.It is driven by the t-belt.

Posted on May 27, 2009

  • 86 Answers

SOURCE: I have a 1997 Lexus ES 300. I need to replace the

yup just follow the hose. remove hose from water neck and remove 2 bolts. let me know how it worked for you.richie

Posted on Jun 29, 2009

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SOURCE: 93 lexus gs 300 overheats. i changed water pump,

Try blowing the radiator fins out (from the inside) with compressed air--bugs and other debris can clog the air flow. Do the radiator fan(s) run when hot? If not, check for blown fuse, seized fan motor(s), bad relay, or bad engine thermal sensor. Is it losing coolant water from somewhere?

Posted on Jul 16, 2009

  • 11800 Answers

SOURCE: I have a 1992 Lexus ES300 that wont start. I think

Yes, you could replace just the heads, bu i don't think they are the problem - it's much more likely that the head gaskets have failed , they are the ones that you should replace first.

Posted on Feb 14, 2011

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Related Questions:

1 Answer

I have a 91 Lexus 250 how do I replace the thermostat


Locate the thermostat housing first...trace the upper radiator hose running to the motor, where it connects to the motor is the housing...usually held in place by 2 bolts...the thermostat is inside this housing when removed from the motor...You can ask ti see the thermostat ...be sure to use the same type of coolant, unless you drain and flush the radiator, and system...Why changing this now...Is your motor overheating?

Jul 11, 2016 | Lexus Cars & Trucks

1 Answer

How to replace thermostat on Lexus ES 300


The thermostat is located inside the thermostat housing, which is attached to the upper radiator hose.

Sep 01, 2013 | 1995 Lexus ES 300

1 Answer

I cannot find the thermostat on my 1991 lexus es 250. Any info would help.


the thermostat is usually in the housing where the top radiator hose connects onto the engine.....chers.

Sep 08, 2011 | 1991 Lexus ES 250

1 Answer

1991 lexus es250 installed new radiator and themostat and car still over heats could it be as simple as replacing the radiator cap ?


YES!! if the cap is faulty the coolant boils out and wham! the coolant boils and air-locks the water pump.

Jun 06, 2011 | 1991 Lexus ES 250

1 Answer

I cant find the thermastat on my 91 lexus es250


FIND YOUR UPER RADIATOR HOSE FOLLOW ID TO THE MOTOR THARE YOU WILL FIND A NECK WITH TWO OR THREE BOLTS REMOVE THE NECK AND THARE IS THE THERMOSTAT

Apr 22, 2011 | 1991 Lexus ES 250

2 Answers

My 1990 lexus runs hot after a half a mile


your thermostat may be stuck closed,try replacing that 1'st

Jun 10, 2009 | 1991 Lexus ES 250

1 Answer

1991 Lexus ES 250 Ignition Problem - Won't start


You need to check timing belt. could have broke belt.Also you should look at water pump if you replace belt.It is driven by the t-belt.

May 26, 2009 | 1991 Lexus ES 250

1 Answer

I have a 1991 lexus that needs a radiator. Is it complicated and expensive to replace a radiator in a lexus?


Not too complicated, removing the fans is the hardest part. Try an aftermarket site like rockauto.com.

Mar 04, 2009 | 1991 Lexus ES 250

1 Answer

Change spark plugs on Lexus ES 250


No you can get to them by using an extension on your rachet with a rotating socket. Play around with the extension and rotating sockets to see which works best.

Dec 24, 2008 | 1991 Lexus ES 250

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