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1997 Toyota T100 Question: i have a 1997 toyota t100 3.4 ltr. 6 cyl. i recently overheated it causing



stoobydooby, 3.4L V6, Venice, FL, September 22, 2011, 23:26

i have a 1997 toyota t100 3.4 ltr. 6 cyl.
i recently overheated it causing my head gaskets to blow ,,, i got a friend of mine to take the motor apart . i had my heads completely rebulit from natl cyl, head in tampa
that mechanic said my heads turned out great ,,, but my mechanic who put it all back together either didnt do something right or something else is wrong because now
the cooling system will not except a thermostat we tried 3 different new ones fail safe ones and it still over heated so we took and left the thermostat out ,, it runs cold now but it idols really high,,, there must be some reason why it wont except a thermostat but my friend cant figure it ou t,,, he swears he put it all back together to the T by the book ,, so any suggestions ??? please desperate stressed confused and out of money now ,,,, please help thanks

2 Answers
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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, September 23, 2011, 01:24

    The T100 is a great engine earlier 4 Runners had head gasket problems. The original thermostat has a bypass valve at the base of it. three nuts holding the housing on very straight forward to replace, (about 35 minutes). What caused the truck to over heat in the first place. Is the radiator working correctly, not restricted internally? Is the cooling fan hub working correctly? There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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  • Answer #2

    February 02, 2014, 08:14

    Hi, were you able to figure out what the problem was? I have the same problem. After the mechanic did the head gasket, the idle was too high. Then other parts were replaced, including the idle control unit (wrong part replace), thermostat, etc. The last thing he did was to replace the temp sensor. Now the idle is normal, but it overheating. So, IDK if it's the sensor because I believe the sensor does not control the temperature, it only provides a reading. Or, IDK if the mechanic did something wrong.
    Please let me know. Thanks.

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