I have The European Chevrolet Spark from 2013, 1.0L Petrol (Isuzu engine) with a manual gearbox, and I found out the NORMAL coolant temperature is around 105 degrees(221 F) and the car does NOT overheat - the thermostat opens at 102 or 105 and the fan starts at 107 degrees(225F).
The car is running like a clock(around 200k km)
I was shocked that for GM this temperature is normal. Is there a way to change those parameters using OBD software?
Is there a way to change those parameters using OBD software?
No. Coolant temperature is regulated by the mechanical valve called a thermostat.
The entire engine will be designed around this temperature setpoint, so I wouldn't mess with it.
Engines do run more efficiently at a higher temp. And with such small displacement, maybe emissions aren't such a big deal.
https://www.youtube.com/watch?v=e6GGBGAa2Hg
If that's the temperature the engine is designed to run at don't try to change it. Bear in mind that in a pressurized cooling system running a 50/50 mix of water/antifreeze at 15 psi (typical for most vehicles) the coolant won't boil until it reaches over 260 degrees. Just be sure your antifreeze and radiator cap are OK and service your cooling system regularly.
No. Coolant temperature is regulated by the mechanical valve called a thermostat.
In theory, I can find a similar one in the Autoparts shop from another car brand, but I still need to change the software, because the fan will start again at 107 degrees.
But maybe for a 2000-3000 Euros car, it doesn`t worth it.
In long term, I think that this will affect the head gasket! (now it`s 200k km on LPG)
No, it's not worth it. A few degrees of coolant temperature won't make any difference to your head gasket. Combustion temperatures are many times higher. And if the coolant isn't hot enough you'll get sludgy oil.
Next time please include important information (like LPG) in your original question. It's normal for propane engine to run a bit hotter.
"It's normal for propane engine to run a bit hotter"
Can confirm. LPG, for an engine, is equal to very high octane petroleum. Even in the best-finetuned LPG engine, its combustion parameters are not optimal enough for an engine designed for burning petrol, and it a) burns hotter than petrol, and b) burns longer, hence not exactly where the engine supposes fuel to burn (partly in the exhaust manifold), thus frying valves and engine heads. So if I had LPG I would always have a spare engine head in my garage 😉
The car has a factory LPG system and all the mileage was done on LPG(200k). That's my second Spark. The first one last 250k (I did 100k) and then It was totaled after a car accident with a Mercedes. The engine is strong, but the gearbox is the only weakest point. The Spark saved me a lot of money — here a gallon of gas costs almost 8 dollars and the LPG is 3 times less.
at 15 psi (typical for most vehicles) the coolant won't boil until it reaches over 260 degrees.
In my cap said 20psi
close enough
Better yet. At 20 psi a 50/50 mix won't boil until it reaches 275 degrees.