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Engine overheat

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Old Feb 27, 2018 | 04:08 AM
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Default Engine overheat

Engine overheating on slow speed and idle.
Replaced the radiator, fans are working fine, opened the thermostat valve also.
Still the problem exists.
​​​​​​Feont axke boots are wearing out faster coz of the over heat, I guess.
Pls help.
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Old Feb 27, 2018 | 08:43 AM
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What year and model? (330, 350, 400h)
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Old Feb 27, 2018 | 05:32 PM
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What do you mean by "opened the thermostat valve"? Are you referring to the bleeder located towards the rear of the thermostat housing? All this does is bleed air out of the system after opening it up for service, which you need to do after radiator replacement. Did you bleed it at the upper hose too (at radiator)- there is a spot for this as well. Sounds like you may still have air in it and need to bleed it out.
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Old Feb 28, 2018 | 05:34 AM
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Originally Posted by nvakeith
what year and model? (330, 350, 400h)
rx330,2004 model
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Old Feb 28, 2018 | 06:30 AM
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Originally Posted by NVAKeith
What year and model? (330, 350, 400h)
Originally Posted by chalkboss
What do you mean by "opened the thermostat valve"? Are you referring to the bleeder located towards the rear of the thermostat housing? All this does is bleed air out of the system after opening it up for service, which you need to do after radiator replacement. Did you bleed it at the upper hose too (at radiator)- there is a spot for this as well. Sounds like you may still have air in it and need to bleed it out.
It seems like this thermostat valve will open when the engine temperature goes up a certain level. So that tye engine coolant will fully flow into the circuit.
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Old Feb 28, 2018 | 06:31 AM
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Originally Posted by ChunksRX
It seems like this thermostat valve will open when the engine temperature goes up a certain level. So that tye engine coolant will fully flow into the circuit.
Simply removed this valve so all the time there will be full flow of the coolant to the circuit.
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Old Feb 28, 2018 | 08:22 AM
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You removed the thermostat? Not sure why you would do this; if removed will cause your overheat. I suggest replacing the thermostat and seal and leave the system as the factory intended.
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Old Feb 28, 2018 | 11:42 AM
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Originally Posted by ChunksRX
Engine overheating on slow speed and idle.
Replaced the radiator, fans are working fine, opened the thermostat valve also.
Still the problem exists.
​​​​​​Feont axke boots are wearing out faster coz of the over heat, I guess.
Pls help.
Here's my original thread back in '17 with a similar issue - https://www.clublexus.com/forums/rx-...erheating.html

The resolution to my issue is referenced in post #8

Hope this helps you out!
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Old Feb 28, 2018 | 11:56 AM
  #9  
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Originally Posted by chalkboss
What do you mean by "opened the thermostat valve"? Are you referring to the bleeder located towards the rear of the thermostat housing? All this does is bleed air out of the system after opening it up for service, which you need to do after radiator replacement. Did you bleed it at the upper hose too (at radiator)- there is a spot for this as well. Sounds like you may still have air in it and need to bleed it out.
I'm pretty unsure if the mechanix done air bleeding.
I will ask to redo it.
Thanks for the reply😃
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