Question about 1995 Toyota 4Runner

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Over heating I flushed radiator/coolling system, replaced thermostat.  And temp gage now goes higher than before!  Needle sits right at, and slightly to right of middle of gage.  Used to sit just left to middle of gage.  At times, surges up.... I slow down, turn heater on, shift to neutral and coast as far/long as possible, keep ECT on, and it comes down. Need to replace radiator, slight pin hole on top of radiator now, thinking time to replace water pump, hopefully it's easy enough to do myself, any thoughts? Next, I've read/heard of running with NO thermostat or cutting it in half? What are the pro's and con's to this? I know this year model is prone to this problem... are there known fixes? PLEASE let me know any ideas to fix with out dumping tons of cash into this! Ed

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  • edjfinn Mar 04, 2009

    Thank you Joe,

    I know the radiator has ran it's course, and is gonna get replaced.  Just seemed odd to spike in temp after doing the up keep to help it work better!  This truck has been running hot for the past 2 years, hopefully it's all due to this old radiator and gets fixed w/ a new one.  I live in San Diego, so the heater issue isn't too big a deal, I thought maybe just run w/out the thermostst through summer, but thank you for informing of the increased fuel comsumption!  If it runs as hot as it used to after a new radiator... I'll let it do so, rather run hot than use more gas, I'm only getting 14mpg or so now as it is!
    Thank you for the help!


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The radiator needs to have a rot out or get replaced. Over time the water deposits build up inside radiator and affect heat transfer.Keep your thermostst in. If you remove it your gas miledge will drop because the coolant temp sensor will tell the computer that the truck is not warmed up yet and the computer will tell the fuel injectors to ad more fuel. also in winter your heater will take a long time to heat up. Joe ASE Master Tech

Posted on Mar 04, 2009

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