Water "Disappearing" From Tank

[IanDaddy]

yes, battery water is distilled water.

 

[terry8]

Mystery Almost Solved

The "mystery" is almost solved now. The fan which I had replaced recently with a taiwanese equivalent was not operating at high speed when needed to and thus the temperature of the water were boiling. The water tank was old and water was forced out there and one of the O ring in one of the hose were also old.

Will know by Monday if these are the cause

Terry

 

[terry8]

Still leaking Problem not solved

 

[moots]

yowzer...............5 litres of water in a day.?that is a hellava lot of water to go in a day.shud be easy to detect.do a cooling system pressure test with engine hot and cold.surely some water will be spitting from somewhere.

and the distillled water/battery water thingy...that is an overkill ....really.fill it with 50/50 tap water and coolant.you'll be fine.of crs you can also use evian if you want to......

 

[terry8]

Pressure test done with both engine hot & cold - shows no drop of pressure but I am sure it's a leak somewhere - maybe a hairline crack

 

[jarance]

Pressure test done with both engine hot & cold - shows no drop of pressure but I am sure it's a leak somewhere - maybe a hairline crack

How do you do pressure test when engine is HOT?

 

[terry8]

The mechanic did this by running the car for half an hour with the water cap opened. It is definitely leaking somewhere.

Then he capped it with his equipment and he pump the pressure up to a certain pressure and watch the gauge.

Terry

 

[jarance]

The mechanic did this by running the car for half an hour with the water cap opened. It is definitely leaking somewhere.

Then he capped it with his equipment and he pump the pressure up to a certain pressure and watch the gauge.

Terry

While the engine is warming up, did you see any water overflowing from the radiator inlet where the cap is to be?

When water is overflowing from the cooling system, what would think is replacing the water? Air !! Your mechanic is inducing air pocket in the cooling system.

I have mentioned many time in my postings that the pressure test is NOT a sure way of finding leaks. This is based on my 12 years driving a BMW.

Here is a tip on how to check for leak.

1. Filled the radiator with water.
2. Open the bleeder to bleed the air and keep filling until all the air bubbles is purge out.
3. Start the engine and rev up the engine speed.
4. Keep filling the radiator and check the bleeder cap for air bubbles. If there is none, close the bleeder cap.
5. Keep filling the water until overflow. (Basically not allow any air in the radiator)
6. After the engine is warm up for about 10 minutes, off the engine. Wait 1 minute and check for water drop let from the bottom of the car.
7. Trace the source of the water droplet.

The above test is basically heat up the water and expanding it. If there is no air trapped in the cooling system, the cooling system will be pressurise by the expanding water. If there is any leak it will be seen by the formation of water droplet.

Remember to drain the excess water after the above test.

 

[terry8]

While the engine is warming up, did you see any water overflowing from the radiator inlet where the cap is to be?

When water is overflowing from the cooling system, what would think is replacing the water? Air !! Your mechanic is inducing air pocket in the cooling system.

I have mentioned many time in my postings that the pressure test is NOT a sure way of finding leaks. This is based on my 12 years driving a BMW.

Here is a tip on how to check for leak.

1. Filled the radiator with water.
2. Open the bleeder to bleed the air and keep filling until all the air bubbles is purge out.
3. Start the engine and rev up the engine speed.
4. Keep filling the radiator and check the bleeder cap for air bubbles. If there is none, close the bleeder cap.
5. Keep filling the water until overflow. (Basically not allow any air in the radiator)
6. After the engine is warm up for about 10 minutes, off the engine. Wait 1 minute and check for water drop let from the bottom of the car.
7. Trace the source of the water droplet.

The above test is basically heat up the water and expanding it. If there is no air trapped in the cooling system, the cooling system will be pressurise by the expanding water. If there is any leak it will be seen by the formation of water droplet.

Remember to drain the excess water after the above test.

All the above been done several times already.

There is still a leak but the mechanic said that at least the water was not boiling after he changed the fan. Now he has a problem finding where the leak is.

Terry

 

[jarance]

All the above been done several times already.

There is still a leak but the mechanic said that at least the water was not boiling after he changed the fan. Now he has a problem finding where the leak is.

Terry

I find it hard to believe that your mechanic have done what I have described. It is totally different from your mechanic procedure.

If you cannot find the leak, ask your mechanic to dismantle the 2 rubber hoses, the expansion tank, the radiator and inspect all individual component individually.

I found the source of the leak under the rubber hose and also under the radiator nozzle. All of the hairline crack cannot be seen as they are hidden.

 

[terry8]

The mechanic has already replaced the expansion tank and some O rings in the hose. Still leaking somewhere.

Terry

 

[Hellraiser]

bro, try to get a second opinion. water problem is freaking serious. you don't want to be stranded somewhere along the expressway.

 

[terry8]

Yes it serious - the car is with the mechanic since last week. I'm not driving it around.

Terry

 

[jarance]

If all fail, try changing the radiator cap.

 

[initialM]

If I dun have any record or history of the car, I change all the cooling system of the car. BMW a lots of plastic & very sensitive to pressure. Must do proper air bleeding oso.:listen:

 

[terry8]

If all fail, try changing the radiator cap.

Yes this is one item we are suspecting to be part of the problem

 

[affan66]

my radiator cap was the culprit when I lost coolant.
Open the cap when cold. CHeck and see if the O-ring is still bulging out or flat with the plastic surface. If flat, change it.

 

[jarance]

!@#$%^&*() Aiyoyo..

After 1 year of trouble free with the cooling system, my car suddenly have low coolant alarm.

Have to top up about 1 liter of water after every 100 Km. So far check but cannot find the leak.
Suspect could be the rubber hose for the Aircon/heater because I have not change that hose.

Planning to send to workshop ASAP for through check. sigh..

 

[Alex5522]

!@#$%^&*() Aiyoyo..

After 1 year of trouble free with the cooling system, my car suddenly have low coolant alarm.

Have to top up about 1 liter of water after every 100 Km. So far check but cannot find the leak.
Suspect could be the rubber hose for the Aircon/heater because I have not change that hose.

Planning to send to workshop ASAP for through check. sigh..

Bro

Biasa la wear and tear

 

[QD250]

check:

top hose
bottom hose

and

rear hose , behind the engine under the cabin filter...