KIA BESTA 2.7 spends a lot of water and heats up

In Kia Besta engines, when the cylinder head is resurfaced, the thermostat housing must also be resurfaced. If only the cylinder head is resurfaced, it will be uneven after reassembly. Another issue is that sometimes the problem originates in the fan; the centrifugal fan isn't working properly and isn't able to cool the engine. This engine shouldn't be run without a thermostat because the water doesn't circulate much to the radiator since the thermostat is a two-way type. Furthermore, special diesel antifreeze must be used; it's not expensive because it boils at a higher temperature than regular water. Another possibility is the water pump.

Hey friend! Here are a couple of tricks to try and find
the problem: 1- With the engine cold, remove the radiator cap, fill it with coolant, start the engine, and with a bucket in hand, keep adding coolant to the radiator and watching for air bubbles. A few might appear at first, but they should ALL disappear. If they don't disappear, there are internal problems in the engine. If there are no bubbles, then you have problems with leaks to the outside (radiator, water pump, heater core in the cabin, hoses, block seals, etc.). If it's the second case, add water mixed with coolant to make it white, and it will be easier to locate the leak... There you have it, the first chapter of the saga!
If bubbles are present: remove the glow plugs (or ignition plugs). Set the engine to top dead center (TDC) (exactly or hold it with a tool) and inject air into the combustion chambers. Any damaged cylinder will expel air through the radiator. This only tests the combustion chamber and the gasket. These are the routine and normal tests. If you want to test if any cylinder liner is cracked, that's a different story. See how easy it is? Good luck and... that's it! You decide the next chapter of this saga.

Hey friend, I wanted to tell you... someone else who has the same car recommended removing the thermostat... but it scares me. They say it should be removed in the summer and only put back in during the winter. What do you think? And that's why it's using water... and what's the best coolant? I'd really appreciate your advice.

I was told to remove the thermostat, but from what you're saying, I shouldn't... A friend told me it should be removed in the summer and only put back in the winter... that the worst thing is having a thermostat at all... What should I do? Thanks, friend!

Hi friend, in most vehicles, when you remove the thermostat, the engine coolant flows directly to the radiator, cooling it down faster. Imagine the thermostat as a valve for the water: it opens when the engine is hot, allowing water to flow through, and closes when the temperature drops, allowing the water to circulate only within the engine and not into the radiator. However, in the Kia Besta, the thermostat is a two-stage thermostat. The water flows converge at the thermostat, and when it opens in one direction, it simultaneously closes in the other, redirecting the water flow. When you remove it, not all the water goes to the radiator; only some of it flows, and some also circulates within the engine, leaving a section where the water stagnates and doesn't circulate. The engine still cools down due to the siphoning effect (hot water rises higher than cold water), but this isn't recommended.