Question about 1991 Lexus LS 400

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So i changed the thermostat in my 1991 lexus 400 now my car is overheating thats never happened i also changed the radiator top can somebody please tell me whats going on

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Possible air block or you may have by mistake installed thermostat up side down. Also make sure cooling fans are working

Posted on Nov 08, 2016

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Posted on Jan 02, 2017

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3 Answers

My toyota camry 1994 is overheating after 100 kilometre drive


Might be a plugged up radiator

If you need further help, I’m available over the phone at https://www.6ya.com/expert/robert_573a00ba7e399076

Oct 24, 2015 | Toyota Cars & Trucks

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What does the ported vacumm switch do and could it be related to overheating


Overheating is caused by the following:
1. Defective thermostat
2. Clogged radiator with deposits due to age
3. Antifreeze that has not been changed for several years
The ported vacuum switch has nothing to do with the cooling system of your car. It just controls when vacuum gets to a particular part or not.

May 22, 2015 | 1991 Lexus LS 400

1 Answer

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


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

May 10, 2014 | 1991 Lexus ES 250

1 Answer

94.lexus ls400- keeps pushing radiator coolant out of overflow,


Your radiator could be glogged and causing it to back up out of overflow,drain coolant,if still good,save and remove bottom hose from radiator get hose and insert in radiator and let run and see how flow is,if clooged,go to autozone and tell them what is happening and they will get you what you need to unglog .To check water pump,unscrew radiator cap and put over opening,crank engine,let it get at operating temperature,remove cap and check flow.Click on link to view radiator flush. http://www.autozone.com/autozone/accessories/Fluids-and-Chemicals/Radiator-Cleaner-and-Additive/_/N-262g?filterByKeyWord=radiator+flush&fromString=search

Oct 20, 2012 | 1994 Lexus LS 400

1 Answer

The fans at front of lexus/92 LS 400 don't work


1992 ls400 engine light was on replaced thermostat now lights off......fans dont work anymore,last time it worked was about 3 weeks ago now having overheating probloms

Jun 10, 2012 | 1991 Lexus LS 400

2 Answers

My lexus ls400 1991 the two electri fan all time is on


Either the temperature sensor on the radiator, or the relay is bad.
Pull a wire off the temperature sensor on the radiator.
If it stops the fans, then the sensor is bad and the relay ok.

Jul 19, 2010 | 1991 Lexus LS 400

1 Answer

It shows it is over heating but I'm not sure it is we just put a new radiator in it and thermostat what else could it be


Water ump is out, thermostat installed incorrectly without gasket, thermostat bad out of box, electric cooling fan not funtioning, radiator cap bad.

Apr 28, 2010 | 1991 Lexus LS 400

1 Answer

My lexus ls400 u9 1991 is overheating


Suggest checking electric cooling fan operation, then replace thermostat.

Apr 25, 2010 | 1991 Lexus LS 400

1 Answer

1990 Lexus Ls 400. What tempture is my car suppose to run at?


your car should not be near that, it should stay at the middle line or a little under. You need to keep an eye on your radiator fluid level. I just changed the radiator and thermostat in my wifes car. DO NOT DRIVE YOUR CAR IF ITS RUNNING THAT HOT, IT WILL BLOW YOUR MOTOR!!!

Jul 25, 2009 | 1993 Lexus Ls 400

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