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What would make a 1995 Toyota Tacoma run hot?

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Old 23 Sep 2010, 10:09 pm   #1 (permalink)
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Default What would make a 1995 Toyota Tacoma run hot?
I have a 1995 Toyota Tacoma 4x4 v6 automatic. It is trying to run hot. Just replaced the thermostat and that wasn't it. The top half of the radiator and the top radiator hose gets hot and the bottom half of the radiator and bottom hose stay cold..I had it checked by 2 mechanics and it is not a cracked or blown head. Any suggestions on what might be causing this???















one mechanic said that the thermostat wasn't locked up and the radiator was fine but hydrocarbons were getting into the cooling system and the other said that the thermostat was locked up and replaced it but didn't know what was wrong and thinks we should try to replace the radiator..the whole bottom half and bottom house are completely cold like water can't circulate at all...neither mechanic knew what was wrong with it, even after the $100 a piece we spent to get it tested. They both say it shows no signs of a cracked or blown head..
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Old 23 Sep 2010, 10:25 pm   #2 (permalink)
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By you saying that the bottom of the radiator stays cold you have a coolent problem, there is no flow.















Maby a plugged radiator or bad water pump or the thermostat in wrong.















Something is causing your coolant not to flow that is why the lower half of the radiator is cold.
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Old 23 Sep 2010, 10:40 pm   #3 (permalink)
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The rad core is plugged at the bottom. Get new rad or rebuild it.
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Old 23 Sep 2010, 10:54 pm   #4 (permalink)
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what did the two mechanics have to say?the top hose and radiator should be hotter than the bottom is the rad full?water pump,fan,fan belts,rad fins clean,leaks,temp sensor?ttora.com is a great site for help
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Old 23 Sep 2010, 11:09 pm   #5 (permalink)
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Low coolant level.
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