1995 Lexus GS 300 over heating

Tiny
MIZZFAITH
  • MEMBER
  • 1995 LEXUS GS 300
  • 0.5L
  • 6 CYL
  • AUTOMATIC
  • 90,000 MILES
I just replaced my fan clutch on my car two days ago because of over heating and today it ran hot on me again?
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Wednesday, March 25th, 2015 AT 8:50 PM

3 Replies

Tiny
CARADIODOC
  • EXPERT
At what speed did it overheat? If this was at highway speed, the fan isn't even needed thanks to natural air flow. You might consider having your mechanic perform a chemical test at the radiator to check for a leaking cylinder head gasket. That can allow combustion gases to pool under the thermostat which will cause it to not open.
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Wednesday, March 25th, 2015 AT 9:21 PM
Tiny
MIZZFAITH
  • MEMBER
I was at complete stop when it happens the second time! I just bought this car and ever sense I have bought it shakes real bad when I come to a complete stop. Now its over heatingon me and push I still owe 2500 on it ! I'm just wondering is it worth me keeping it and fixing it if it is a blown head gasketare the motor! I'm lost
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Thursday, March 26th, 2015 AT 12:42 AM
Tiny
CARADIODOC
  • EXPERT
Now that you've added more symptoms, a leaking cylinder head gasket is a good suspect, but there's a quick chemical test that can be performed to confirm that. Typically you'll be losing coolant too. The test involves drawing air from the radiator through a glass cylinder with two chambers partially-filled with a special dark blue liquid. If combustion gases are leaking into the cooling system, the liquid will turn bright yellow. Those gases can pool under the thermostat and prevent it from opening. Thermostats have to be hit with hot liquid to open. Hot air won't do it.

Personally, I'd rather see you spend your money on a head gasket than on a newer car. I am really opposed to all the proliferation of unnecessary, complicated, and expensive computers. As cars get newer, the engineers keep trying to outdo each other to see who can dream up the most insanity.
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Saturday, March 28th, 2015 AT 10:20 PM

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