Loosing water from reservoir and radiator

Welcome to 2CarPros.

I'm a bit confused. The heading says it is losing coolant from the radiator and reservoir, but you indicate you can't see where it is leaking. Do you mean there is coolant loss in those components with no visible leaks?

If so, have you checked to see if by chance coolant is mixing with the engine oil? Also, is there any white smoke from the exhaust?

Take a look through this link and see if anything mirrors what you are experiencing. The link is related to a bad head gasket and explains what you may see and how to check.

https://www.2carpros.com/articles/head-gasket-blown-test

Here is a link that explains how to find and repair a leak. Also, I attached one that explains how to pressure test the cooling system to help find leaks. You will need the pressure tester, but most parts stores will lend or rent one to you.

https://www.2carpros.com/articles/car-is-leaking-coolant

https://www.2carpros.com/articles/radiator-pressure-test

Let me know if any of this helps or if you have other questions.

Take care,
Joe

yes, there is coolant loss from both reservoir and radiator. I have checked oil and no water in oil there are no bubbles coming up in radiator. when I remove cap and there is no white smoke. I have looked on Pajero forum and they speak about losing water through the water pump into the valleys of the motor. I am sorry but I hit a couple of wrong buttons when I first asked this question. The car is a 2005 Pajero exceed 4 cylinder diesel turbo.

Welcome back:

Not a problem. It has to be going somewhere. Is there anything under the vehicle? I'm not familiar with your vehicle, but usually when a water pump begins to fail, they will leak through a weep hole and it is evident. Don't laugh, but is there any evidence of coolant on the interior floor? A heater core can leak too. Also, a radiator cap that doesn't hold pressure can allow coolant to evaporate.

Let me know. Like I mentioned, I'm not too familiar with this vehicle, but I will try to help. If you see nothing leaking, what I suggest is to pressurize the cooling system to see if that helps and if it holds pressure. Take a look through this link:

https://www.2carpros.com/articles/radiator-pressure-test

Here is a general link discussing how to fix a coolant leak:

https://www.2carpros.com/articles/car-is-leaking-coolant

Let me know if that helps. I will watch for your reply.

Take care,

Joe

nothing on the floor of garage and nothing in floor of car. radiator cap new and thermostat new.

Welcome back:

Listen, if there is no evidence of a leak, what I would do is pressurize the system with the pressure tester and see if it holds pressure. We know the coolant is going somewhere. If there are no external leaks, I have a feeling it's going into the engine.

Let me know.

Joe

I suspect water is going into engine.

Welcome back, Chris.

If water is entering the engine, then you should see evidence of it in the motor oil. Usually it will cause the oil to become a creamy tan color where it mixed. Check for evidence of that and let me know what you find.

Joe

think it is leaking into combustion chamber. no water in oil oil is clean.

Most times, but not always, you will see excessive white smoke from the exhaust if that is happening. Is there any evidence of that?

Joe

no white smoke.

Welcome back:

At this point, since there is a question if it could be a head gasket, I recommend doing a compression test. See if the compression is low in one of the cylinders. Take a look through these links and let me know if they help.

https://www.2carpros.com/articles/the-reasons-for-low-compression

https://www.2carpros.com/articles/symptoms-of-low-compression

https://www.2carpros.com/articles/how-to-test-engine-compression

Let me know.

Take care,
Joe