98' Camry still overheating after repairs - Toyota Nation Forum : Toyota Car and Truck Forums
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post #1 of 7 Old 06-25-2019, 09:54 PM Thread Starter
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98' Camry still overheating after repairs

Hello fellow Camry enthusiasts, I was recently driving around and noticed my coolant was bubbling once I parked. I figured my coolant was getting old so I flushed it which made the issue much worse to the point it's actually overheating. That's when I replaced the thermostat temp sensor and the thermostat just in case, but that didn't work. The hot coolant wasn't leaving the block (lower radiator hose never gets hot) so Ive spent the last couple of days swapping out the water pump, but it's still overheating. I'm not even able to bleed the air out.. I'm convinced it's not a head gasket since there's no smoke coming from the exhaust and the oil is fine. Im completely stumped, any ideas?
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post #2 of 7 Old 06-25-2019, 10:13 PM
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What exact thermostat did you use? I recommend OEM thermostats only. I had a brand new aftermarket "Murray/Motorad" thermostat that was bad right out of the box. Caused me a lot of grief until I decided to suspect it and replaced it with an OE thermostat which resolved the problem.

Lift up the front of the car to help bleed out the air bubbles. I would still test for head gasket issues if you still have problems after confirming bleeding air bubbles out and verifying the thermostat quality. You can "rent" a chemical tester for free from some auto parts stores. You have to buy the chemical though.
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Last edited by John Anthony; 06-25-2019 at 10:23 PM.
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post #3 of 7 Old 06-25-2019, 10:50 PM
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+1 chemical block tester to check for blown head gasket. I'd also pull your new tstat and test it to see if it opens. If not, replace with OE Kuzeh or Tama (easiest way to get is to order an Aisin from NAPA or RockAuto, it's a reboxed Tama).

These cars are insanely easy to - and well-designed to - bleed. A spill-free funnel makes that even easier, but the bottom line is air in the system isn't really an issue unless you have an issue with the tstat, water pump, clog in system, or BHG.
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post #4 of 7 Old 06-25-2019, 11:06 PM Thread Starter
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The tstat I used was a Murray, it is
labeled OE however..
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post #5 of 7 Old 06-25-2019, 11:10 PM Thread Starter
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Everytime I turn it on to bleed the air, it'll start bubbling alittle but the air doesnt seem to come out until I actually turn. (It bubbles but the coolant doesn't go down till it's off)
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post #6 of 7 Old 06-26-2019, 09:10 AM
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Quote:
Originally Posted by Isaac Odom View Post
The tstat I used was a Murray, it is
labeled OE however..
Murray stinks and it is NOT an OE thermostat.


Quote:
Originally Posted by insightbrewery View Post
+1 chemical block tester to check for blown head gasket. I'd also pull your new tstat and test it to see if it opens. If not, replace with OE Kuzeh or Tama (easiest way to get is to order an Aisin from NAPA or RockAuto, it's a reboxed Tama).

These cars are insanely easy to - and well-designed to - bleed. A spill-free funnel makes that even easier, but the bottom line is air in the system isn't really an issue unless you have an issue with the tstat, water pump, clog in system, or BHG.

^^ One of the best posts I've read in a while.

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Last edited by John Anthony; 06-26-2019 at 09:20 AM.
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post #7 of 7 Old 06-26-2019, 09:50 AM
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Quote:
Originally Posted by Isaac Odom View Post
I was recently driving around and noticed my coolant was bubbling once I parked.
Did the fans start when this happened?

Quote:
That's when I replaced the thermostat temp sensor...
Do you mean the fan switch in the bottom of the rad?

Quote:
The hot coolant wasn't leaving the block (lower radiator hose never gets hot)
To test flow remove the t-stat, gut the internals (use the Murray for that). Then replace the stat housing and fill the system with coolant then start the engine. Remove the rad cap (cold engine) and observe the flow of coolant. If it's not flowing then maybe you have a plugged rad.

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