Engine heating like hell !!!! - Toyota Yaris Forums

Bony_ahmed · 05-21-2017, 08:49 AM

i've oem rad.....synthetic coolant....the car is not over heating....but heat comes inside the cabin....and engine heats up like hell.....need advice. Do i need to change the water pump.....or buy a bigger radiator.....or do nothing

Bluevitz-rs · 05-21-2017, 09:28 AM

Make sure you're using the proper red coolant.

And make sure your heater controls aren't broken. If the cable came off it could be stuck at full heat.

DiCaprio · 05-21-2017, 09:41 AM

I've never really noticed heat coming inside the cabin, except when driving at full throttle on the autobahn. I'm not sure, but i think the headers of every single engine available for the Yaris are facing towards the cars firewall. So the headers could cause your cabin to heat up quite a lot. So maybe a exhaust heat wrap can cope with that.

But if you are not driving at full throttle and heat still comes inside your cabin, that would mean that most likely something is wrong with your cooling system.

SirDigby · 05-21-2017, 01:20 PM

DEI also makes a product called Reflect-A-Gold that is adhesive 18k gold you can stick to your firewall and cover your ECU. awesome product for blocking radiant heat. also hood vents remove heat as well.

jra · 05-21-2017, 07:38 PM

Could be hot water valve to your heater core letting water circulate, valve not closed all the way, or a bad valve, I've had heater valves that were closed but would still let water through. Touch your heater hoses at the firewall, if both hoses are hot, it's the heater valve.

tmontague · 05-21-2017, 08:27 PM

Quote:

Originally Posted by jra

Could be hot water valve to your heater core letting water circulate, valve not closed all the way, or a bad valve, I've had heater valves that were closed but would still let water through. Touch your heater hoses at the firewall, if both hoses are hot, it's the heater valve.

I thought there is always coolant flow to the hear exchanger, it is just the air flowbtjat changes to include or exclude the hear or cold outside air?

Bony_ahmed · 05-22-2017, 03:50 PM

i've checked everything......no problems anywhere....thinking about adding an external fan to improve cooling......r there any drawbacks to that ?

05-21-2017, 08:49 AM	#1
Bony_ahmed Drives: Toyota Yaris SEdan Join Date: Oct 2016 Location: Dhaka, Bangladesh Posts: 36	Engine heating like hell !!!! i've oem rad.....synthetic coolant....the car is not over heating....but heat comes inside the cabin....and engine heats up like hell.....need advice. Do i need to change the water pump.....or buy a bigger radiator.....or do nothing

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05-21-2017, 09:28 AM	#2
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	Make sure you're using the proper red coolant. And make sure your heater controls aren't broken. If the cable came off it could be stuck at full heat.

05-21-2017, 09:41 AM	#3
DiCaprio Just a Gaijin View User's Garage Drives: 2006 Yaris 4 door 1.3l Join Date: Apr 2017 Location: Germany Posts: 139	I've never really noticed heat coming inside the cabin, except when driving at full throttle on the autobahn. I'm not sure, but i think the headers of every single engine available for the Yaris are facing towards the cars firewall. So the headers could cause your cabin to heat up quite a lot. So maybe a exhaust heat wrap can cope with that. But if you are not driving at full throttle and heat still comes inside your cabin, that would mean that most likely something is wrong with your cooling system.

05-21-2017, 01:20 PM	#4
SirDigby View User's Garage Drives: 2007 yaris 3 door Join Date: Sep 2015 Location: Denver, Colorado Posts: 1,000	DEI also makes a product called Reflect-A-Gold that is adhesive 18k gold you can stick to your firewall and cover your ECU. awesome product for blocking radiant heat. also hood vents remove heat as well.

05-21-2017, 07:38 PM	#5
jra Drives: 2015 yaris L Join Date: Jun 2016 Location: Indiana Posts: 77	Could be hot water valve to your heater core letting water circulate, valve not closed all the way, or a bad valve, I've had heater valves that were closed but would still let water through. Touch your heater hoses at the firewall, if both hoses are hot, it's the heater valve.

05-22-2017, 03:50 PM	#7
Bony_ahmed Drives: Toyota Yaris SEdan Join Date: Oct 2016 Location: Dhaka, Bangladesh Posts: 36	i've checked everything......no problems anywhere....thinking about adding an external fan to improve cooling......r there any drawbacks to that ?