System not pressurized? Try pressure test to see if it holds pressure
My Coolant keeps boiling with normal temperature what’s is the issue
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I would check to see if you have either of these issues first since they are easy to diagnose and cost the cheapest to replace.
1. Bad/Faulty Reservoir Cap
2. Small crack somewhere on the coolant reservoir tank itself. I actually had this issue and had to replace the tank. Takes about 10 minutes along with the air burping process.
1. Bad/Faulty Reservoir Cap
2. Small crack somewhere on the coolant reservoir tank itself. I actually had this issue and had to replace the tank. Takes about 10 minutes along with the air burping process.
Greetings, most every 1.4t owner has had coolant system issues. It is THE most important system regarding this engine to keep in good condition. That means air/water tight and 100% sealed up to 20 psi.
imho and as briefly as I can say pertaining to the cruze gen1 and from my own experience:
1. replace your coolant reservoir and cap. The photo clearly shows it has been leaking. Less than $30 us. Dorman or Acdelco.
2. Follow the upper smaller hose from the reservoir down to the coolant outlet. That connector is very fragile, replace hose if leaking.(acdelco) The hottest coolant liquid flows through the outlet from the engine and is directed to the radiator(big hose on front), oil cooler(smaller hose on front), the heater core hose(on back), and the return to reservoir(hose on top), and...another?. It has 1 of 2 coolant temperature sensors integrated. It is made of plastic and breaks apart under extreme heat. Replace it if leaking. $20 us. Acdelco
3. Follow the large hose down to the radiator inlet. the radiator on the cruze seems to be robust and is rarely the problem unless structural damage has happened.
4. Go to the radiator outlet on the other side and follow the large hose to the thermostat. Replace the thermostat if older than 50k Mi. $45 us. Acdelco. Also, the 2nd coolant temperature sensor is on the outlet side, edge of the radiator with an electrical connector.(can leak, but prob not). Also, the bleed screw is on back of radiator toward top, white color.
5. The thermostat is bolted to the water pump inlet. check for water pump leaks under that side of the engine. Water pump warrenty up to 10years/130k mi.
6. Check oil cooler(behind turbo) and turbo coolant hose connections for leaks. ( stick your fingers everywhere on cold engine for coolant drips)
You will get to know your car easily and most handy people can perform these repairs themselves with the correct inexpensive tools. Good Luck! Hope this helps, long post...I was in a sharing mood...
I am open to corrections if I missed or mis-stated anything.
Please check the "how to" section on the forum.
@Blasirl
imho and as briefly as I can say pertaining to the cruze gen1 and from my own experience:
1. replace your coolant reservoir and cap. The photo clearly shows it has been leaking. Less than $30 us. Dorman or Acdelco.
2. Follow the upper smaller hose from the reservoir down to the coolant outlet. That connector is very fragile, replace hose if leaking.(acdelco) The hottest coolant liquid flows through the outlet from the engine and is directed to the radiator(big hose on front), oil cooler(smaller hose on front), the heater core hose(on back), and the return to reservoir(hose on top), and...another?. It has 1 of 2 coolant temperature sensors integrated. It is made of plastic and breaks apart under extreme heat. Replace it if leaking. $20 us. Acdelco
3. Follow the large hose down to the radiator inlet. the radiator on the cruze seems to be robust and is rarely the problem unless structural damage has happened.
4. Go to the radiator outlet on the other side and follow the large hose to the thermostat. Replace the thermostat if older than 50k Mi. $45 us. Acdelco. Also, the 2nd coolant temperature sensor is on the outlet side, edge of the radiator with an electrical connector.(can leak, but prob not). Also, the bleed screw is on back of radiator toward top, white color.
5. The thermostat is bolted to the water pump inlet. check for water pump leaks under that side of the engine. Water pump warrenty up to 10years/130k mi.
6. Check oil cooler(behind turbo) and turbo coolant hose connections for leaks. ( stick your fingers everywhere on cold engine for coolant drips)
You will get to know your car easily and most handy people can perform these repairs themselves with the correct inexpensive tools. Good Luck! Hope this helps, long post...I was in a sharing mood...
I am open to corrections if I missed or mis-stated anything.
Please check the "how to" section on the forum.
@Blasirl
Thanks BossGreetings, most every 1.4t owner has had coolant system issues. It is THE most important system regarding this engine to keep in good condition. That means air/water tight and 100% sealed up to 20 psi.
imho and as briefly as I can say pertaining to the cruze gen1 and from my own experience:
1. replace your coolant reservoir and cap. The photo clearly shows it has been leaking. Less than $30 us. Dorman or Acdelco.
2. Follow the upper smaller hose from the reservoir down to the coolant outlet. That connector is very fragile, replace hose if leaking.(acdelco) The hottest coolant liquid flows through the outlet from the engine and is directed to the radiator(big hose on front), oil cooler(smaller hose on front), the heater core hose(on back), and the return to reservoir(hose on top), and...another?. It has 1 of 2 coolant temperature sensors integrated. It is made of plastic and breaks apart under extreme heat. Replace it if leaking. $20 us. Acdelco
3. Follow the large hose down to the radiator inlet. the radiator on the cruze seems to be robust and is rarely the problem unless structural damage has happened.
4. Go to the radiator outlet on the other side and follow the large hose to the thermostat. Replace the thermostat if older than 50k Mi. $45 us. Acdelco. Also, the 2nd coolant temperature sensor is on the outlet side, edge of the radiator with an electrical connector.(can leak, but prob not). Also, the bleed screw is on back of radiator toward top, white color.
5. The thermostat is bolted to the water pump inlet. check for water pump leaks under that side of the engine. Water pump warrenty up to 10years/130k mi.
6. Check oil cooler(behind turbo) and turbo coolant hose connections for leaks. ( stick your fingers everywhere on cold engine for coolant drips)
You will get to know your car easily and most handy people can perform these repairs themselves with the correct inexpensive tools. Good Luck! Hope this helps, long post...I was in a sharing mood...
I am open to corrections if I missed or mis-stated anything.
Please check the "how to" section on the forum.
@Blasirl
just buy a whole new reservoir mine was doing the same earlier this year. mine had a hairline crack on that upper inlet hose.
The gauge is not working properly, see the same issue I had years ago and what I've done to make it work. No issues since.Temperature Half but Coolant keep boiling
1.4 ECO - Thermostat Swap - 221°F to 176°F! | Chevrolet Cruze Forums (cruzetalk.com)
My temp gauge stays one notch below half from low 180s to right about 237. In this pic at 240.8 the gauge has started moving up. I shut it off that day at 242. Didn't get the "A/C off" message that day, so that happens above 242. The issue that day was the fan not running.
A few days ago I did the aluminum outlet, and the Volt thermostat. Heater still works fine, and so far it doesn't look like I lost any mpg, car stays around 185 now. The thermostat is my second best mod, right behind the ebay flvv that allows my to drive 4 days on a tank of gas.
![Speedometer Odometer Trip computer Tachometer Gauge]()
A few days ago I did the aluminum outlet, and the Volt thermostat. Heater still works fine, and so far it doesn't look like I lost any mpg, car stays around 185 now. The thermostat is my second best mod, right behind the ebay flvv that allows my to drive 4 days on a tank of gas.
There are now aftermarket METAL Coolant outlets that can be purchased....I highly suggest going that route for anyone that has theirs stock part fail. I replaced the stock Delco one 3...yes...3 times before they finally came up with a metal aftermarket option. This part should NEVER have been made out of plastic to begin with...but I digress.2. Follow the upper smaller hose from the reservoir down to the coolant outlet. That connector is very fragile, replace hose if leaking.(acdelco) The hottest coolant liquid flows through the outlet from the engine and is directed to the radiator(big hose on front), oil cooler(smaller hose on front), the heater core hose(on back), and the return to reservoir(hose on top), and...another?. It has 1 of 2 coolant temperature sensors integrated. It is made of plastic and breaks apart under extreme heat. Replace it if leaking. $20 us. Acdelco
@Blasirl
I am having the same issue with my 2014 Cruze. I have already replaced the water pump and a leaking hose. Now after getting to normal operating temperature the coolant in the reservoir is boiling and coming out of hole beneath the cap. I have contemplated changing the thermostat but could it just be the reservoir?
Could be. The cap needs to make a seal with the top of the tank and hold pressure up to 20psi. I made a pressure tester that pumps into the 5/16ths hose that goes into the top of the tank.. This proves that my cap/tank interface is good and it vents right at 20psi.I am having the same issue with my 2014 Cruze. I have already replaced the water pump and a leaking hose. Now after getting to normal operating temperature the coolant in the reservoir is boiling and coming out of hole beneath the cap. I have contemplated changing the thermostat but could it just be the reservoir?
If you want to make a pressure tester you just need a length of fuel hose a guage and a 1/4inch air pressure regulator. Also get an air hose fitting for the inlet side of the pressure reg... All for less than $20 at Harbor Freight.
Connect your air compressor to the inlet side of the regulator and you can now wind up the discharge pressure. It will maintain a constant pressure. Connect this to the tank and plug the other end of the hose.
Now you can pressure test your entire cooling system overnight with a cold engine. If you any leaks anywhere thiis thing will find it.
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