Overheating Issue - Page 3 - Toyota Yaris Forums

Eli Lilly · 09-27-2012, 06:27 PM

Quote:

Originally Posted by YanMinor

I thought the radiator top-off fixed the problem, but I'm certain that I shouldn't have to do this yearly.... The fan still doesn't come on when I run it for several minutes, and I think that it may be problem with the thermostat or the water pump. Does either one sound more likely than the other? Are their corresponding fixes DIYable?
!

I'd guess the thermostat before the water pump. Water pumps usually leak as their failure mode, the only way they quit pumping without having eaten the serpentine belt would be for the vanes to get eaten away, which is very, very, very uncommon with modern engine coolant.

-E

Arod0610 · 07-06-2018, 09:36 PM

So I just changed the water pump radiator and thermostat and I’m still having overheating problems ... and tips or help I can get is appreciated!!

06YarisRS · 07-06-2018, 11:53 PM

Quote:

Originally Posted by Arod0610

So I just changed the water pump radiator and thermostat and I’m still having overheating problems ... and tips or help I can get is appreciated!!

Are you positive you put enough coolant in the car? You might have an airlock. I've done many coolant changes and the Yaris purges air pretty easily if you have enough coolant in the system. If you have a smart phone you can pick up Torque Pro app and a cheap OBD2 bluetooth adapter (everything for under $20.00) and monitor coolant temps. That's what I use so as I approach ~180 F, I start feeling the upper rad hose for heat to see that the thermostat is opening.

Arod0610 · 07-07-2018, 02:01 AM

yeah I’m positive it has enough coolant... just today the coolant was spilling threw the resivor tank

tmontague · 07-06-2018, 09:59 PM

Define overheating - what are you experiencing? Could be a bad rad cap, could be a faulty coolant temp sensor, could be a blown head gasket etc etc

Arod0610 · 07-06-2018, 10:35 PM

I can drive the car for about 15-20 minutes before it goes hot also when the ac is on it goes hot faster

stykerdk · 07-07-2018, 07:34 AM

And the electric fan is running, it should run when the AC is on.
And on mine 2013 the rpm on the fan increases when the coolant get hot.
So it could be the thermoswitch on the coolant.

Bluevitz-rs · 07-07-2018, 09:07 AM

Pull the rad cap while cold, start the engine and let it heat up. If start seeing bubbles you have a head gasket leak. Had that happen on an old CRX race car I used to crew for.

Arod0610 · 07-07-2018, 11:57 AM

I tried the rad cap all I get is a couple air bubbles... could it be a bad thermostat?

hw6515 · 07-07-2018, 02:10 PM

If everything started when you ran the car with low coolant level I think air could be the problem.

Double check all your work and flush the whole system as instructed in the water pump replacement guide.

Properly fill and bleed the air out of the system, use toyota coolant.

Arod0610 · 07-07-2018, 03:09 PM

Got it... thanks for all the help really appreciate it

07-06-2018, 09:59 PM	#5
tmontague View User's Garage Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012 Location: Caledonia Ont. Posts: 2,938	Define overheating - what are you experiencing? Could be a bad rad cap, could be a faulty coolant temp sensor, could be a blown head gasket etc etc __________________ No one ever wants to give a Yaris the point by...

07-07-2018, 07:34 AM	#7
stykerdk Yaris Hybrid Limited 2015 Drives: yaris Hybrid limited 2015 Join Date: Mar 2012 Location: Denmark Posts: 176	And the electric fan is running, it should run when the AC is on. And on mine 2013 the rpm on the fan increases when the coolant get hot. So it could be the thermoswitch on the coolant. __________________ Yaris Hybrid Limited 2015 C-HR 1,8 Hybrid premium 2020

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07-06-2018, 09:36 PM	#2
Arod0610 Drives: 2007 yaris Join Date: Jan 2018 Location: California Posts: 5	So I just changed the water pump radiator and thermostat and I’m still having overheating problems ... and tips or help I can get is appreciated!!

07-07-2018, 02:01 AM	#4
Arod0610 Drives: 2007 yaris Join Date: Jan 2018 Location: California Posts: 5	yeah I’m positive it has enough coolant... just today the coolant was spilling threw the resivor tank

07-06-2018, 10:35 PM	#6
Arod0610 Drives: 2007 yaris Join Date: Jan 2018 Location: California Posts: 5	I can drive the car for about 15-20 minutes before it goes hot also when the ac is on it goes hot faster

07-07-2018, 09:07 AM	#8
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Pull the rad cap while cold, start the engine and let it heat up. If start seeing bubbles you have a head gasket leak. Had that happen on an old CRX race car I used to crew for.

07-07-2018, 11:57 AM	#9
Arod0610 Drives: 2007 yaris Join Date: Jan 2018 Location: California Posts: 5	I tried the rad cap all I get is a couple air bubbles... could it be a bad thermostat?

07-07-2018, 02:10 PM	#10
hw6515 Drives: 08 Yaris AT, 350Z GT MT Join Date: Feb 2013 Location: U.S Posts: 70	If everything started when you ran the car with low coolant level I think air could be the problem. Double check all your work and flush the whole system as instructed in the water pump replacement guide. Properly fill and bleed the air out of the system, use toyota coolant.

07-07-2018, 03:09 PM	#11
Arod0610 Drives: 2007 yaris Join Date: Jan 2018 Location: California Posts: 5	Got it... thanks for all the help really appreciate it