LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Apparently this temp is normal?

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Old 07-17-17, 02:55 AM
  #16  
deanshark
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Originally Posted by 981uz
I really appreciate your help, The thermostat is actuality new I got it done a month ago when I got the coolant flushed. They measured the temp and the internal sensor is measuring 192F, the thermo gun measured 195F. This is what is leading me to believe the sensor or the cluster is off. Its also a OEM 180 degree thermostat as well. I would think if the car started reaching up to the 200's it would cause the gauge to read at the temp mine is at.
Just curious but who bought and changed the thermostat? Is it possible a 195* tstat was put in and not a 180*?
Old 07-18-17, 12:00 AM
  #17  
Losiracer2
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Originally Posted by YODAONE
A scan tool.that can read coolant temperature input might provide insight..

Another thing...

Many of us still.have original radiators...

After 20+ years there is going to be a fair amount of crud in the radiator fins that are reducing it's efficiency....removal, inspectionl and cleaning (or replacement DENSO.95+ are inexpensivet) are in order.

Also expired is the foam sealing strips with pressure sensitive adhesive that are used between radiator and shroud...which reduces efficiency.

Anyone source a durable replacement?
Good point. I didn't recall initially, but the previous owner replaced the original radiator in my 97' with a Denso aftermarket one just before I purchased, so that could be helping make the car run as cool as it is. The original one cracked the neck somewhere around 244k when he got it back in late 2014, just to give you an idea of life expectancy.
Old 07-18-17, 07:35 AM
  #18  
SW17LS
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Did you wind up taking it to Nelson? He said it was fine?
Old 07-18-17, 09:36 AM
  #19  
981uz
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Originally Posted by SW15LS
Did you wind up taking it to Nelson? He said it was fine?
Hey!, I did actually end up taking it to him and he flushed the coolant and changed the thermostat but the gauge has started to creep higher. I'm starting to believe the problem lies within the gauge cluster.
Old 07-18-17, 09:54 AM
  #20  
SW17LS
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My guess is that's the case...
Old 07-18-17, 01:51 PM
  #21  
alien1974
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thats normal, mine is exactly the same
Old 07-19-17, 10:34 AM
  #22  
dicer
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In the old days 180 degree was the norm. With emissions stuff the engines are run hotter to keep the emissions down so as high as 220 or so can be normal these days.
If the gauge in the car is not in the correct spot then its either the gauge or the sensor.
Old 07-19-17, 06:42 PM
  #23  
deanshark
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Originally Posted by dicer
In the old days 180 degree was the norm.
Oh yea, gotta love the old days.When a human brain tuned an engine, not a computer. Didn't need a T-stat, in the summer.
Old 07-20-17, 09:59 AM
  #24  
LS9698
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The temp gauge on my 96 LS has never worked, when measuring the coolant it's around 190f or so. It's never over heated and never worried me.

I bought a new Denso radiator for my 98 LS on Amazon for $69.00, thermostat has 82C stamped on it (179.6F)
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