Hai guys, i need help...

My VIOS 2012 got overheat issues, coolant from engine got push into spare tank.
Means engine got empty but spare tank full. the coolant do not rotate back to engine. i have to topup engine coolant manualy.

1. I went to OFFICIAL Toyota SC, they said the radiator fan got problem, so need to change motor and blade. No leaking, pressure test also OK.

2. Then i went to other NOT OFFICIAL Toyota SC, they said change waterpump, thermostat, clean radiator. Fan is OK, No Leaking. I also thing fan is OK since i test it myself.

So i did No. 2, Change waterpump, thermostat, clean radiator and new coolant. But after few days overheat issues happened again.

Now im ready to change the Radiator Fan.

anyone had the same experience and know the solution? please let me know...

from my googleling most suggest No. 2, that why i did that.

Parking

I rather trust SC than google search...

If both method cost diff below 1k, for me i go with SC.

Anything can claim back... but for outside shop? U got warranty ka?

trust SC for this case.. anything can get back with SC

Check the radiator cap

yo open your engine oil see what color now? brown or black ?

yup. by right should replace this first

not expensive even

+1

So.. you have difficulty starting the car the in the morning?

watercooling is not hard. find the hot hose & cold hose.
trace ur radiator temp & fan speed using obd

answer will be clear

Head gasket gone.

You should go sc. Anything happen can refer back.

Now sudah buat dua kerja.

yup NCP 93 model got this problem, I've encountered before 3 years ago. Changed radiator fan and also some other things. Bill was a hefty one ~1k from Toyota SC but now all SC become dealer own dealer operate already so no more UMW quality. That was the final time entering Toyota SC, better get the service done outside and cheaper too.

There was a problem with a minor vibration when the fan kicks in, juddering for a short while then goes off. After that spare parts replacement no more already. It's a small issue but needs attention, consider cheap since it's only one time issue.

That dugong Vios god car, will be keeping since it's almost bulletproof and very less issue.

Additional. Do check the aircon fan compressor clutch...is also a known issue for replacement after so many years running. Get the one from Denso and you're good to go.

This post has been edited by metalfire: Mar 23 2021, 06:29 PM

Check if the coolant is oily?

I faced this before too
check engine oil, most probably become brown colour
observe reserve tank, got bubbles coming out from tube or not, suspected engine head warped, engine coolant leaking into engine or gas from inside engine leaking into rediator
for me, I overhall the engine and everything back to normal.

Head warped. Need to do a top overhaul.

Do a compression test on all 4 cylinders first to verify.

fill up radiator. dont close cap.
start enjin & see pancut or not

yes, this is the 1st thing i changed, forgot to mention.

For 8 years never services/repair outside, all at Official Toyota SC, but only this time the answer do not convinced me, since the fan is working when i test it.
But i will refer them back and change the fan.

pancuted, coolant overflow.

No problem

i will check, but i just did the interval service at Toyota SC.


this is expensive

yes, change fan motor and blade around 1k.
what spare parts you change?

yes, this car still feel buttery smooth, only this issue give me headache.

Not Oily

will check
how much overhaul cost you?

This post has been edited by Atsumori: Mar 23 2021, 07:19 PM

need to differentiate if just normal coolant overflow because the coolant heated up. but if you say constant air bubbles coming from radiator, coolant pancuted, most probably head gasket gone already. last time i watch my mechanic work, they place a bottle with water on top of the radiator, air bubbles keep coming up.

head gasket gone what to do and how much it will cost?

pancut mean ur piston compress fuel explode high pressure gas come out the wrong hole. gasket leak

depends. if only replace head gasket, probably few hundreds. the gasket itself is cheap, but takes a lot of work and time to get the head out.

if the head already warped due to the heat, then the cost will be more.

Seriously, this was one of the major reasons i sold my Vios.

The overheat and water lost couldn't be detected. Even change hose and radiator.

SC only said change fan, which is one thing.

But outside shop change 3 things.

I'm trying to find the reason why you wanna change 2 things.

my foreman told me before, if ur car has overheated before, depends on how severe it is, it might caused the engine block to become disfigured (senget), once it became senget thats all, no matter what u do, will hv water leak and evaporated.

sounds like the head... change it.

if fan is the issue, your temperature will drop when you are driving.
only obvious rising when you are idling.

+1

went throught this, however my case built up slowly in the time of many months

best to just overhaul it

if the engine block already disfigured, overhaul will not solve the problem lol. thats y u need to hv a good foreman, they can spot this issue which they know overhaul alone cant solve it.

dey ur car have thermostat or not..sometimes thermostat problem already..thermostat like gate for the water to flow inside ur engine..b4 change waterpump try remove the upper hose..see water flow out or not when ur engine running..

I guess he is right

I drive the car about 5 mins in overheat condition just to get to a workshop. That did the damage

sorry that time 3-4 years ago, forgot already what other spare parts got change.

Car issue sure everybody headache, not only you...well maybe those got plenty of money and many different cars to drive different level lar.

I haven't done overhaul yet but do check with a good mech outside. Don't need to do it at Toyota SC anymore since they charge arm and leg for it.

If not oily I think still not so serious.

Mostly like others said your engine head gasket most likely need replacement, more worrying is if the metal corroded caused leak, that one u need cari potong engine top sudah.

Damage how much? U need open up only know, if lucky few hundreds, if unlucky few thousands.

And check also if the radiator is bubling like they suggest, if bubling really means leaking already, worst thing you don't want it to happen is the water leak in to your combustion chamber or mixed with engine fluid, that's why I asked about if Radiator fluid is oily.

Change the whole radiator, get a double layer radiator, get a performance radiator fan. Remove thermostate.

You will never see your temperature gauge move higher than 20%

i guess SC notice the fan motor is weak .
they should know as they have the experience dealing with some cases .

you observe overheating is town driving 50km/h or highway driving at 110?

next is change fan,
else
Change Radiator...
cleaning will not help.

does coolant loss over the time?

there's vios trusted specialist located in Klang, the shop name "V Max Garage" or you can search this friendly guy name "Low Soon Seng" on Fb.