Toyota Yaris 2021 xp210 Coolant Leak and Engine Misfire

[alex25rrr]

I have a 2021 Toyota Yaris with the following problem: the coolant is leaking. I noticed sediment that looks like sand or dried coolant in the intake manifold of the first cylinder. The engine misfires for about half a minute when cold, then runs normally. Additionally, there’s a sound of liquid coming from under the driver’s feet when the internal combustion engine starts.

[alex25rrr]

7 minutes ago, alex25rrr said:

I have a 2021 Toyota Yaris with the following problem: the coolant is leaking. I noticed sediment that looks like sand or dried coolant in the intake manifold of the first cylinder. The engine misfires for about half a minute when cold, then runs normally. Additionally, there’s a sound of liquid coming from under the driver’s feet when the internal combustion engine starts.

 

[anchorman]

Read this - particularly right at the end which describes an internal EGR coolant leak.  It would explain the misfire and coolant loss but why it should manifest itself in cylinder one could be down to liquid not behaving like gas.  
 

https://toyota-club.net/files/faq/20-08-01_faq_df_r3_en.htm

[alex25rrr]

3 минуты назад ведущий сказал:

Прочитайте это - особенно прямо в конце, который описывает внутреннюю утечку охлаждающей жидкости EGR. Это объяснило бы осечка и потерю охлаждающей жидкости, но почему это должно проявляться в цилиндре, это может быть сверь то, что жидкость не ведет себя как газ.
 

https://toyota-club.net/files/faq/20-08-01_faq_df_r3_en.htm

Could this be a blown head gasket or a crack in the engine block?

[anchorman]

7 hours ago, alex25rrr said:

Could this be a blown head gasket or a crack in the engine block?

It could be either but I doubt it in one port like that.  It doesn’t start inside the port, it’s already started in the inlet manifold and the only coolant in there comes from the water cooled EGR valve.  I take it you have a non hybrid model?

[alex25rrr]

29 minutes ago, anchorman said:

It could be either but I doubt it in one port like that.  It doesn’t start inside the port, it’s already started in the inlet manifold and the only coolant in there comes from the water cooled EGR valve.  I take it you have a non hybrid model?

It's a hybrid version of the Toyota Yaris.

[skidlid]

Its only 3 years old (2021 car?), what about warranty?

[alex25rrr]

3 minutes ago, skidlid said:

Its only 3 years old (2021 car?), what about warranty?

My car has a mileage of 194,000 kilometers, so the warranty no longer applies to it:(((

[TonyHSD]

In this case trace down egr system for leaks, and particularly the egr cooler which best to be replaced. Carefully clean to perfection the valves and the galley as you don’t want any hard formation gets into cylinder and scratch it. , you gonna get high oil consumption afterwards. 
Really looks egr cooler leak rather than head gasket. 
https://www.ebay.co.uk/itm/324546255966?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=4oKqFtubSLG&sssrc=4429486&ssuid=p34UK1z2T4m&var=&widget_ver=artemis&media=COPY

[alex25rrr]

7 minutes ago, TonyHSD said:

In this case trace down egr system for leaks, and particularly the egr cooler which best to be replaced. Carefully clean to perfection the valves and the galley as you don’t want any hard formation gets into cylinder and scratch it. , you gonna get high oil consumption afterwards. 
Really looks egr cooler leak rather than head gasket. 
https://www.ebay.co.uk/itm/324546255966?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=4oKqFtubSLG&sssrc=4429486&ssuid=p34UK1z2T4m&var=&widget_ver=artemis&media=COPY

Thanks for the advice. I will check the EGR cooler for leaks.

[flash22]

The EGR cooler is a known issue especially where fuel quality may be an issue, this can blow the head gasket if you don't get on top of the issue

Introduction
This Technical Service Bulletin is to inform you of the diagnosis for the subject concern.
Description of the phenomenon

Some customers may experience and report white smoke, lack of coolant, and/or engine hesitation
(sometimes with DTC P319000 and/or P04019C) due to internal damages in the EGR system.
These phenomena may happen due to Chlorine contamination or durability issue. If you find white corrosion,
please refer to this TSB as this indicates contamination. Otherwise please follow the repair manual.

Detail

Corrosive chemicals cause severe damages in the EGR system.
Investigation of reported cases identified the presence of chemicals (Chloride, Chlorine and derivatives) which
are not originally present in the vehicle and are not generated during vehicle operation.
Fuel investigation of affected vehicles showed excessive levels of Chlorine.
How to differentiate between excessive chemical presence and other
White deposits (powder and/or crystals) are observed inside the EGR valve and/or EGR cooler (see picture).
As a cause, the fuel has excessive Chlorine. This case is not a manufacturing defect, and will not be covered
under warranty.

Please advise customer to use reliable fuel source and repair EGR system. For repair cost, please negotiate
with the vehicle owner / discuss with your NMSC;

 

[flash22]

Can you post a pic of your egr cooler inlet/ontlet

[alex25rrr]

18 minutes ago, flash22 said:

The EGR cooler is a known issue especially where fuel quality may be an issue, this can blow the head gasket if you don't get on top of the issue

Introduction
This Technical Service Bulletin is to inform you of the diagnosis for the subject concern.
Description of the phenomenon

Some customers may experience and report white smoke, lack of coolant, and/or engine hesitation
(sometimes with DTC P319000 and/or P04019C) due to internal damages in the EGR system.
These phenomena may happen due to Chlorine contamination or durability issue. If you find white corrosion,
please refer to this TSB as this indicates contamination. Otherwise please follow the repair manual.

Detail

Corrosive chemicals cause severe damages in the EGR system.
Investigation of reported cases identified the presence of chemicals (Chloride, Chlorine and derivatives) which
are not originally present in the vehicle and are not generated during vehicle operation.
Fuel investigation of affected vehicles showed excessive levels of Chlorine.
How to differentiate between excessive chemical presence and other
White deposits (powder and/or crystals) are observed inside the EGR valve and/or EGR cooler (see picture).
As a cause, the fuel has excessive Chlorine. This case is not a manufacturing defect, and will not be covered
under warranty.

Please advise customer to use reliable fuel source and repair EGR system. For repair cost, please negotiate
with the vehicle owner / discuss with your NMSC;

 

Yes, I read that information. There's no white smoke from the exhaust, but what interests me the most is why these deposits, crystalline and sandy, are only in the first cylinder in the cylinder head.

[alex25rrr]

20 minutes ago, flash22 said:

The EGR cooler is a known issue especially where fuel quality may be an issue, this can blow the head gasket if you don't get on top of the issue

Introduction
This Technical Service Bulletin is to inform you of the diagnosis for the subject concern.
Description of the phenomenon

Some customers may experience and report white smoke, lack of coolant, and/or engine hesitation
(sometimes with DTC P319000 and/or P04019C) due to internal damages in the EGR system.
These phenomena may happen due to Chlorine contamination or durability issue. If you find white corrosion,
please refer to this TSB as this indicates contamination. Otherwise please follow the repair manual.

Detail

Corrosive chemicals cause severe damages in the EGR system.
Investigation of reported cases identified the presence of chemicals (Chloride, Chlorine and derivatives) which
are not originally present in the vehicle and are not generated during vehicle operation.
Fuel investigation of affected vehicles showed excessive levels of Chlorine.
How to differentiate between excessive chemical presence and other
White deposits (powder and/or crystals) are observed inside the EGR valve and/or EGR cooler (see picture).
As a cause, the fuel has excessive Chlorine. This case is not a manufacturing defect, and will not be covered
under warranty.

Please advise customer to use reliable fuel source and repair EGR system. For repair cost, please negotiate
with the vehicle owner / discuss with your NMSC;

 

When the car is cold, it always runs rough for about half a minute, then it stops. I also constantly hear sounds when the engine starts, like some water is flowing near the driver's feet. This also lasts for about 2-3 seconds and then stops.

[alex25rrr]

16 minutes ago, flash22 said:

Can you post a pic of your egr cooler inlet/ontlet

Okay, I will take a photo later when I remove the EGR cooler again to check for leaks.

[alex25rrr]

17 minutes ago, flash22 said:

Can you post a pic of your egr cooler inlet/ontlet

Here is a photo I took when I removed the EGR valve for the first time. There was some kind of liquid on it, but I couldn't identify what it was.

[Cyker]

That looks pretty clean to me... I suspect the wetness is just water - Exhaust gas contains a LOT of water.

I can't get over what that stuff in intake #1 is - Coolant usually crystallizes to purpley-looking deposits but that looks like sand or rust or something tried to make nest in it!  

If you clean it out how fast does it come back...?

Have you had a look at the air filter? I'm curious if it's disintegrated or been chewed up by rats/mice or something...

Also, wow, nearly 200km in 3 years!? Even TonyHSD will find that impressive!  

[TonyHSD]

These crystals are normal , what is not normal is the coolant, it is clearly a coolant from the cooler. 
Cooler find that are like a small radiator, these gets corroded by the chemicals as mentioned by flash and the coolant starts leaking into exhaust gases which goes into intake manifold via egr valve. 

 

 

Why only on first cylinder is the coolant formation I can’t say for sure but it is possible the small holes on other two cylinders to be blocked since the car has some mileage on now, these when gets blocked and they do get they stop letting exhaust flow back into combustion, it’s like egr closed. 

 

[alex25rrr]

2 hours ago, Cyker said:

That looks pretty clean to me... I suspect the wetness is just water - Exhaust gas contains a LOT of water.

I can't get over what that stuff in intake #1 is - Coolant usually crystallizes to purpley-looking deposits but that looks like sand or rust or something tried to make nest in it!  

If you clean it out how fast does it come back...?

Have you had a look at the air filter? I'm curious if it's disintegrated or been chewed up by rats/mice or something...

Also, wow, nearly 200km in 3 years!? Even TonyHSD will find that impressive!  

The air filter is new. This weekend, I will remove the intake manifold and check for any deposits that have appeared. The mileage is indeed very high.😅

[alex25rrr]

11 minutes ago, TonyHSD said:

These crystals are normal , what is not normal is the coolant, it is clearly a coolant from the cooler. 
Cooler find that are like a small radiator, these gets corroded by the chemicals as mentioned by flash and the coolant starts leaking into exhaust gases which goes into intake manifold via egr valve. 

 

 

Why only on first cylinder is the coolant formation I can’t say for sure but it is possible the small holes on other two cylinders to be blocked since the car has some mileage on now, these when gets blocked and they do get they stop letting exhaust flow back into combustion, it’s like egr closed. 

 

Thanks for the advice. I'll try to remove the intake manifold this weekend and check if these holes are blocked or not. I'll clean everything once more. But today I discovered a new problem. When I open the radiator cap, there is a release of pressure, like a hiss. I did this when the engine was cold, and this shouldn't happen when it's cold.

[TonyHSD]

26 minutes ago, alex25rrr said:

Thanks for the advice. I'll try to remove the intake manifold this weekend and check if these holes are blocked or not. I'll clean everything once more. But today I discovered a new problem. When I open the radiator cap, there is a release of pressure, like a hiss. I did this when the engine was cold, and this shouldn't happen when it's cold.

That’s with the pressure from radiator cap is very likely normal, depending how much and how cold was the engine. 
Try again next day or after 4-5 hrs of been parked. 
Coolant if mixed with gases a lot will change its colour and from pink it will turn into brownish like and it will smell of petrol. 
You can open the radiator cap and let the engine running and see if any bubbles comes up. 

[alex25rrr]

1 minute ago, TonyHSD said:

That’s with the pressure from radiator cap is very likely normal, depending how much and how cold was the engine. 
Try again next day or after 4-5 hrs of been parked. 
Coolant if mixed with gases a lot will change its colour and from pink it will turn into brownish like and it will smell of petrol. 
You can open the radiator cap and let the engine running and see if any bubbles comes up. 

Alright, thanks. I'll try doing that tomorrow.

[alex25rrr]

20 hours ago, alex25rrr said:

Alright, thanks. I'll try doing that tomorrow.

 

[TonyHSD]

4 hours ago, alex25rrr said:

 

Looks ok to me. 
The steam on the back it’s normal too. 
Just check egr cooler and evening replace with new ( used clean is also an option). Monitor the situation and if unsure run more tests, test head gasket , coolant test for gases inside, all test and checks before you change any parts to make sure they do really need change. 

[alex25rrr]

Coolant continues to disappear; one liter has gone in a week.