1NZ overheating

[tmontague]

Sorry, it was supposed to say "coolant sealer" those liquid seal-a-leak things that are harmful long term for your engine and other parts

[Yamidan]

So, thermostat is good (tested out of the car), water pump seems good and turns freely and quietly by hand. Coolant level is good, no air bubbles seem present.
Driving between 70-100km/h after 10 minutes the coolant temp goes to 90c and starts climbing rapidly (1degree every 3-5 minutes). Then I turn the heater on full, cabin fan on full and the temp drops to 85-90c and sits there rock solid. The air is blowing “scorching desert wind” hot and after a 30 minute drive the top rad hose is still cold and soft to squeeze. Starting to smell like a blocked rad to me unless I’ve missed something?

[Yamidan]

Originally Posted by tmontague

Sorry, it was supposed to say "coolant sealer" those liquid seal-a-leak things that are harmful long term for your engine and other parts

You were right on. I got around to pulling the rad today and the top tank was almost fully sealed with a sparkly porridge like substance.
New rad went in and the car won’t go over 81c now with the AC on full and heater tap closed. Hopefully there’s not more of this crap in the galleries.

[tmontague]

Originally Posted by Yamidan

You were right on. I got around to pulling the rad today and the top tank was almost fully sealed with a sparkly porridge like substance.
New rad went in and the car won’t go over 81c now with the AC on full and heater tap closed. Hopefully there’s not more of this crap in the galleries.

Glad to hear you got the problem sorted you should he good for the foreseen future, the rad tends to be the most narrow part of a cooling system so the block itself shouldn't be restricted due to that goop crap.

I have personally never found the 1nz to he hard to burn if you have the front jacked up, I just over fill the overflow reservoir when I'm re filling an empty system and after driving around a bit it will burp itself and pull from the overflow.

But as Barber stated, the funnel allows you to do it all in one shot in your driveway and is a convenient tool

[ojeysky]

Hello,

Can someone please help, when am on highway instead of my temperature staying below 90C it goes as far as 105C or more. I have changed gasket, coolant and rad cover.
However what I noticed is that whenever I am descending the temperature rapidly goes back to normal, is this a problem with breeze not getting to the radiator when moving on a flat surface?

I will appreciate all the help I can get here.

Thanks