Question about 1991 Toyota MR2

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Where is the egr mod located on a 1991 lexus es 250

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When the throttle valve is positioned above port R, the EGR vacuum modulator will close the atmosphere
passage and open the EGR valve to increase the EGR gas, even if the exhaust pressure is insufficiently low. ON TOP OF PLENTIUM

Posted on Jul 31, 2013

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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

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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

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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

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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